Class / Patent application number | Description | Number of patent applications / Date published |
564415000 | Forming amine group directly by reduction | 70 |
20080293972 | Process for Preparing Substituted Anisidines - Disclosed is a process for preparing substituted anisidines of formula I starting from substituted cyclic hydroxy-ketones II via aromatization through a substituted oxime intermediate IV in which R is C | 11-27-2008 |
20110196175 | Hydroxylation of Beta-Dicarbonyls with Zirconium Catalysts - The present invention pertains to a process for preparing a compound of Formula I that is achiral, racemic or enantiomerically enriched at the hydroxylation center indicated by * | 08-11-2011 |
20110245540 | PROCESS FOR PRODUCING XYLYLENEDIAMINE - The invention provides a process for producing xylylenediamine, including supplying a solution of phthalonitrile dissolved in a solvent to a reactor filled with a catalyst and hydrogenating the phthalonitrile to produce xylylenediamine, characterized in that the process includes halting supply of the solution; (2) bringing a washing liquid into contact with the catalyst, the washing liquid having a phthalonitrile content of 3 mass % or less and a xylylenediamine content of 1 mass % or more; and after completion of the contact, resuming supply of the solution, and employing the catalyst continuously in hydrogenation. Through the production process of the invention, the catalyst can be employed continuously for a long period of time, and the catalyst-related cost can be considerably reduced. | 10-06-2011 |
20120123164 | Combinations of Eszopiclone and Trans 4-(3,4-Dichlorophenyl)-1,2,3,4-Tetrahydro-N-Methyl-1-Napthalenamine or Trans 4-(3,4-Dichlorophenyl)-1,2,3,4-Tetrahydro-1-Napthalenamine, and Methods of Treatment of Menopause and Mood, Anxiety, and Cognitive Disorders - One aspect of the present invention relates to pharmaceutical compositions containing two or more active agents that when taken together can be used to treat, e.g., menopause, mood disorders, anxiety disorders, or cognitive disorders. The first component of the pharmaceutical composition is a sedative eszopiclone. The second component of the pharmaceutical composition is trans 4-(3,4-dichlorophenyl)-1,2,3,4-tetrahydro-N-methyl-1-napthalenamine or trans 4-(3,4-dichlorophenyl)-1,2,3,4-tetrahydro-1-napthalenamine. The present invention also relates to a method of treating menopause, perimenopause, mood disorders, anxiety disorders, and cognitive disorders. | 05-17-2012 |
20160122285 | Process for the preparation of 2-substituted-1,4-benzenediamines and salts thereof - A process for the preparation of 2-substituted-1,4-benzenediamines, a cosmetically acceptable salt thereof, or mixture thereof. The process according to the present invention is a particularly cost effective process in that it avoids sophisticated chemical steps which requires special equipment or expensive catalysts and in that it comprises a recycling step of one of the starting materials, namely the 2-substituted aniline. | 05-05-2016 |
564416000 | Of nitro or nitroso | 65 |
20090076307 | Aromatic diamine compound and aromatic dinitro compound - A novel aromatic diamine compound obtained by introducing aromatic amino groups into both terminals of a specific bifunctional phenylene ether oligomer and a novel aromatic dinitro compound obtained by introducing aromatic nitro groups into both terminals of a specific bifunctional phenylene ether oligomer, these compounds being used as raw materials for obtaining high molecular weight materials having high heat resistance, a low dielectric constant, a low dielectric loss tangent and a low water absorption coefficient. | 03-19-2009 |
20140303402 | PROCESS FOR THE PREPARATION OF SULFONAMIDE COMPOUNDS - Process for the preparation of known sulfonamides having antibacterial activity applicable on industrial scale, which allows their production in high yields and purity, comprising in particular the step of nucleophile aromatic substitution and oxidation in suitable conditions. | 10-09-2014 |
564417000 | Preparing compound which contains halogen bonded directly to carbon | 9 |
20120296122 | FLUOROETHER-FUNCTIONALIZED AMINOAROMATIC COMPOUNDS AND DERIVATIVES THEREOF - Disclosed are fluoroether-functionalized aminoaromatic compounds and derivatives thereof. The compounds disclosed have utility as functionalized monomers and co-monomers in polyamides, polyoxadiazoles. Incorporation of the monomers into polymers can provide improved soil resistance to articles produced from the polymers. | 11-22-2012 |
20120296123 | FLUOROETHER-FUNCTIONALIZED NITROAROMATIC COMPOUNDS AND DERIVATIVES THEREOF - Disclosed are functionalized fluoroether-functionalized nitroaromatic compounds and derivatives thereof. The compounds disclosed have utility as precursors of functionalized monomers and co-monomers in polyamides, polyoxadiazoles and the like. Incorporation of the monomers into polymers can provide improved soil resistance to articles produced from the polymers. | 11-22-2012 |
20120296124 | Efficient and Recyclable Heterogeneous Nanocatalysts - Efficient and recyclable heterogeneous nanocatalysts and methods of synthesizing and using the same are provided. | 11-22-2012 |
20130035511 | PROCESS FOR HYDROGENATING ORGANIC COMPOUNDS WITH HYDROGEN IN THE GAS PHASE IN THE PRESENCE OF A CATALYST - Process for hydrogenating organic compounds in the gas phase in the presence of a catalyst comprising a nanoparticulate palladium cluster and a gas- and liquid-permeable shell comprising zirconium oxide. | 02-07-2013 |
20130072722 | SUPPORTED METAL CATALYSTS - The present invention relates to supported metal catalysts, wherein the catalysts are modified by at least one amine, a method for the preparation thereof and hydrogenation processes utilising the supported metal catalysts. | 03-21-2013 |
20140066658 | Method for Hydrogenating Nitroaromatic Systems with Selected Platinum Catalysts - A method is described for the catalytic hydrogenation of aromatic nitro compounds with hydrogen to the corresponding amines in the presence of a supported catalyst comprising platinum. The method is characterized in that the catalyst comprising platinum has been modified with a tungsten compound and with a phosphorus compound in an oxidation state of <5. High yields and high selectivities are possible with the method. | 03-06-2014 |
20150080609 | PROCESS FOR REDUCING CHLORONITROBENZENE CATALYZED BY PLATINUM-NANOPARTICLES STABILIZED ON MODIFIED MONTMORILLONITE CLAY | 03-19-2015 |
20150329485 | METHOD FOR PRODUCING BIS(3-AMINOPHENYL)DISULFIDES AND 3-AMINOTHIOLS - The present invention relates to a novel method for preparing bis(3-aminophenyl)disulphides of the general formula (I) and 3-aminothiols of the general formula (II), | 11-19-2015 |
20150352488 | METHOD AND APPARATUS FOR NENOXING WASTE GASES FROM NITRATION - The invention relates to a method for reducing the concentration of nitrogen oxides in waste gases released dating the production of organic amino compounds, wherein an organic compound is first reacted with NO | 12-10-2015 |
564418000 | Preparing compound which contains hydroxy, bonded directly to carbon, or ether | 8 |
20080221358 | Method of Synthesizing Key Intermediates for the Production of Camptothecin Derivatives - The present invention discloses a process for efficient production of 2-amino-5-hydroxypropiophenone corresponding to the AB ring part of camptothecin (CPT) skeleton, which is a key intermediate useful for the total synthesis of camptothecin analogs including 7-Ethyl-10-hydroxy camptothecin and novel intermediates thereof. | 09-11-2008 |
20110092740 | SINGLE-STEP CATALYTIC PREPARATION OF PARA-AMINOPHENOL - The method of using a bi-functional catalyst for the one-step preparation of para-aminophenol. The catalyst includes a mixture of a hydrogenation noble metal and a zirconium sulfate. Also, an improved single-step process for the preparation of para-aminophenol from nitrobenzene, in an aqueous medium, using the bi-functional catalyst. | 04-21-2011 |
20120130128 | Methods of Synthesizing 2-Methoxymethyl-1,4-Benzenediamine - Disclosed is a method of making 2-methoxymethyl-1,4-benzenediamine that includes hydrogenating 1-benzylamino-2-(methoxymethyl)-4-nitrobenzene in the presence of a hydrogenation catalyst. | 05-24-2012 |
20130006017 | NOVEL DIAMINE COMPOUND AND PRODUCTION METHOD THEREOF - The present invention provides a novel diamine compound represented by formula (1) below. A in formula (1) denotes an optionally-substituted divalent aliphatic group (having a carbon number of 10 or less) or an optionally-substituted divalent aromatic group (having the number of rings of 4 or less), for example. The diamine compound of the present invention can be used as a raw material or a crosslinking agent for polyamide, polyimide, polyurethane, epoxy resin, etc. | 01-03-2013 |
20130012741 | 2,4,5-TRIAMINOPHENOLS AND RELATED COMPOUNDS - New triaminophenol compositions and related compounds are disclosed, as are processes for their preparation and for the preparation of novel salts and diacid complexes from such compounds. Polymers prepared from these compositions can be made into high strength fiber, film, and tape and are useful in applications such as protective apparel, aircraft, automotive components, personal electronics, and sports equipment. | 01-10-2013 |
20140094626 | FLUIDIC CHANNEL COATED WITH METAL CATALYSTS AND DEVICES AND METHODS RELATING THERETO - The invention provides a method for coating fluidic channels, particularly millifluidic channels, with a catalyst coating having controlled dimensions and morphology, and methods for preparing such channels, and devices that can be used in combination with the channels. The invention further provides portable, hand-held millifluidic devices applicable for a wide variety of uses including molecular reduction reactions, in situ material characterization, in situ reaction catalysis characterization, in situ reaction mechanism characterization, nanomaterial synthesis, nanostructured metal and metal oxide growth and coating of channels, continuous flow cell culturing, enzymatic catalysis, biomolecular catalysis, combinatorial chemistry, reactions involving homogeneous catalysts bound to channel walls, peptide synthesis, nucleic acid synthesis, synthesis of pharmaceutical intermediates, biofunctionalization of nanomaterials or a combination thereof. | 04-03-2014 |
20140121414 | Process for Preparing Primary Intermediates for Dyeing Keratin Fibers - A process has been developed for preparing 2-methoxymethyl-1,4-benzenediamine (IV-a), other compounds of formula (IV), and the salts thereof, all of which may be used as primary intermediates in compositions for dyeing keratin fibers. | 05-01-2014 |
20140121415 | Process for Preparing Primary Intermediates for Dyeing Keratin Fibers - A process has been developed for preparing 2-methoxymethyl-1,4-benzenediamine (IV-a), other compounds of formula (IV), and the salts thereof, all of which may be used as primary intermediates in compositions for dyeing keratin fibers. | 05-01-2014 |
564419000 | With initial nitration step | 3 |
20130197268 | METHOD FOR PRODUCING NITROBENZENE BY ADIABATIC NITRIDING - The invention relates to a process for the continuous production of nitrobenzene by nitration of benzene with a mixture of nitric acid and sulfuric acid under adiabatic conditions, in which unreacted benzene is separated from the crude product obtained after phase separation before washing thereof, using the adiabatic heat of reaction. | 08-01-2013 |
20140243556 | CONTINUOUS TWO STEP FLOW SYNTHESIS OF M-AMINO ACETOPHENONE - Disclosed herein is a continuous tubular reactor based conversion of acetophenones to amino substituted acetophenones wherein the nitration is carried out at −10 to 10° C. followed by reduction to m-nitrophenone resulting in uniform output of product, said process comprising the steps of: a) Nitrating acetophenone with nitrating agent (nitration mixture or fuming nitric acid) at −10 to 10° C.; b) Isolating m-nitro acetophenone from a mixture of o and m-nitro acetophenone and c) Reducing the m-nitro to obtain m-amino acetophenone. | 08-28-2014 |
20150038743 | Efficient Continuous Process for Manufacturing of 4-Aminodiphenylamine From Aniline and Nitrobenzene - An efficient continuous manufacturing process for 4-aminodiphenylamine by coupling aniline with nitrobenzene in the presence of tetramethylammonium hydroxide (TMAH) as a base, using flow reactors wherein base decomposition is considerably reduced by optimizing base quantity, process conditions and process equipment. | 02-05-2015 |
564420000 | By direct hydrogenation | 43 |
20090005598 | SYSTEM AND PROCESS FOR THE PRODUCTION OF ANILINE AND TOLUENEDIAMINE - A method for producing aniline or toluenediamine is disclosed which comprises forming a dispersion comprising hydrogen gas bubbles dispersed in a liquid medium comprising either nitrobenzene or dinitrotoluene, wherein the hydrogen gas bubbles have a mean diameter less than 1 micron; and subjecting the dispersion to hydrogenation reaction promoting conditions comprising pressure less than about 600 kPa and temperature less than about 200° C., whereby at least a portion of the nitrobenzene or dinitrotoluene is hydrogenated to form aniline or toluenediamine, respectively. A system for carrying out the method is also disclosed. | 01-01-2009 |
20090018366 | PRODUCTION AND USE OF SUPPORTED ACTIVATED BASE METAL CATALYSTS FOR ORGANIC TRANSFORMATION - Method for the production of supported activated metal catalysts, whereby an alloy, a metal powder, a pore builder is dispersed in a water, the dispersion is sprayed on a support which is the dried, calcined and activated. The catalysts can be used for organic transformations, i.e. for hydrogenation reactions. | 01-15-2009 |
20090048465 | PROCESS FOR PREPARING 4-AMINODIPHENYLAMINE - A process for preparing 4-aminodiphenylamine having the steps of reacting nitrobenzene and aniline in the presence of a complex base catalyst, hydrogenating the reaction mixture with hydrogen, a powdery composite catalyst, and a hydrogenation solvent; separating, recovering, and reusing the complex base catalyst and the powdery composite catalyst from the reaction mixture; separating, recovering, and reusing aniline, and optionally water, from the reaction mixture; refining the reaction mixture to obtain 4-aminodiphenylamine. The complex base catalyst comprises tetraalkyl ammonium hydroxide, and tetraalkyl ammonium salt. | 02-19-2009 |
20100228056 | Magnetic Separation Apparatus and Method for Recovery of Solid Material From Solid-Liquid Mixture - The present invention relates to a magnetic separation apparatus for continuous separating and recovering magnetic solid particles from a solid-liquid mixture. The apparatus includes at least one magnetic separation unit and each unit includes: an outer cylindrical vessel having a material inlet, a first outlet, and a second outlet; an inner cylindrical vessel, at least part of which extends along the axis inside the first cylindrical vessel without contacting with the inner surface of the outer cylindrical vessel; and a magnet, rendering the bottom of the inner cylindrical vessel magnetism during the first period and making the part of the surface lose its magnetism during a second period. When the solid-liquid mixture flows through the magnetic surface of the inner cylindrical vessel in the passage, the magnetic solids are absorbed and separated from the mixture. | 09-09-2010 |
20100324336 | PROCESS FOR THE PRODUCTION OF AROMATIC AMINES - Aromatic amines produced by hydrogenation of the corresponding nitroaromatic compounds are purified in a specified manner. In the purification procedure, the particular amine is initially mixed with an aqueous solution of a base. The organic and aqueous phases are then separated by adding excess water. | 12-23-2010 |
20110130592 | Catalyst and Process for Hydrogenating Organic Compounds - The invention relates to a catalyst and a process for hydrogenating organic compounds. | 06-02-2011 |
20110237836 | Method for Producing Alkylnitrobenzenes and Alkylanilines, Unbranched in the 1'-Position, from Nitrotoluenes - The present invention relates to a process for preparing nitrobenzene derivatives and aniline derivatives, which are of significance as intermediates for fungicidally active alkylanilides. | 09-29-2011 |
20120083626 | PROCESS FOR PREPARING AN AROMATIC AMINE AND APPARATUS THEREFOR - The invention relates to a process for obtaining at least one aromatic amine from a liquid mixture comprising water and the at least one aromatic amine by extracting with at least one nitroaromatic in an extraction column ( | 04-05-2012 |
20120172627 | SYSTEMS AND METHODS FOR PRODUCING AROMATIC AMINES AND REMOVING PHENOL THEREFROM - Systems and methods for producing aromatic amines and removing phenol therefrom are provided. The method can include hydrogenating one or more aromatic nitro compounds to produce a reaction product comprising one or more aromatic amines, water, and phenol. The method can also include contacting the reaction product with one or more ion exchange materials to produce an aromatic amine product that contains less phenol than the reaction product. The one or more ion exchange materials can be solid, semi-solid, or a combination thereof. | 07-05-2012 |
20120197044 | PRODUCTION METHOD FOR 4,4'-BIS(ALKYLAMINO) DIPHENYLAMINE - The present invention relates to a production method for 4,4′-bis(alkylamino)diphenylamine, and more specifically relates to a method in which 4,4′-dinitrodiphenylamine (4,4′-DNDPA) is produced by reacting urea with nitrobenzene in the presence of a polar organic solvent and a base catalyst, and then the 4,4′-bis(alkylamino)diphenylamine (4,4′-BAADA) is produced by subjecting the 4,4′-DNDPA and a ketone to hydrogenation in the presence of a hydrogenation catalyst. | 08-02-2012 |
20120215029 | PROCESS FOR PREPARING AROMATIC AMINES - A process for preparing aromatic amines by hydrogenation of nitroaromatics in the presence of catalysts, forming a fluid, amine-comprising reaction mixture in a reactor, wherein chromatographic analysis of the reaction mixture is carried out to determine the concentration of nitro and nitroso compounds in the reaction mixture. | 08-23-2012 |
20120238779 | OPTIMIZED INTRODUCTION OF THE STARTING MATERIALS FOR A PROCESS FOR PREPARING AROMATIC AMINES BY HYDROGENATION OF NITROAROMATICS - The invention relates to a process for preparing aromatic amines by hydrogenation of corresponding nitroaromatics by means of hydrogen, and also an apparatus suitable for this purpose. In particular, the invention relates to a process for preparing toluenediamine (TDA) by hydrogenation of dinitrotoluene (DNT). | 09-20-2012 |
20120264976 | HYDROGENATION CATALYST, PROCESS FOR ITS PRODUCTION AND ITS USE - To provide a hydrogenation catalyst which does not contain chromium oxide, unlike conventional copper/chromium oxide catalysts, and therefore does not cause any environmental contamination or health hazard, and which shows an activity, selectivity and durability at equivalent or higher levels to or than those of conventional copper/chromium oxide catalysts. A hydrogenation catalyst which comprises, as the main components, (1) copper and (2) at least one member selected from the group consisting of silicon oxide, calcium oxide and calcium silicate, wherein the content of the copper is from 20 to 60 wt % based on the entire amount of the hydrogenation catalyst, and in the calcium silicate, the molar ratio of calcium oxide (CaO) to silicon oxide (SiO | 10-18-2012 |
20130006018 | PROCESS FOR THE CONVERSION OF AROMATIC NITRO COMPOUND INTO AMINES - A process for hydrogenating an aromatic nitro compound according to the invention comprises
| 01-03-2013 |
20130079560 | SOLID BASE CATALYST AND METHOD FOR MAKING AND USING THE SAME - A solid base catalyst having a carrier, an organic base, and an inorganic base. Both of the organic base and inorganic base are loaded on the carrier. The solid base catalyst is especially suitable for the synthesis of 4-Aminodiphenylamine (4-ADPA). | 03-28-2013 |
20130131384 | PROCESS FOR RESTORING CATALYST ACTIVITY - The present invention relates to a process for restoring the activity of spent catalysts for the hydrogenation of aromatic nitro compounds, in which a regeneration comprising at least a first burning off stage, a first washing stage, a second burning off stage and a second washing stage is carried out at periodic intervals. | 05-23-2013 |
20130204043 | METHOD FOR CONTINUOUSLY PRODUCING NITROBENZENE - The present invention relates to a continuous process for the production of nitrobenzene by nitration of benzene with nitric acid or mixtures of nitric acid and sulfuric acid to give a crude nitrobenzene, washing of the crude nitrobenzene by means of at least one of each of an acid, alkaline and neutral washing, there being obtained a pre-purified nitrobenzene which, as well as containing nitrobenzene, at least contains also low boilers, optionally middle boilers as well as high boilers and salts, wherein the pre-purified nitrobenzene is purified further by separating off low boilers in a distillation apparatus by evaporation of the low boilers, and separation of nitrobenzene from the resulting further purified nitrobenzene in a distillation apparatus by partial evaporation of nitrobenzene, wherein pure nitrobenzene is removed from the distillation apparatus in gaseous form and is subsequently condensed, and wherein the non-evaporated portion of the further purified nitrobenzene is fed back into the washing at any desired point. | 08-08-2013 |
20130211141 | MONITORING OF THE STOICHIOMETRIC RATIO IN THE REACTION OF NITROAROMATICS WITH HYDROGEN - The present invention relates to a continuous process for preparing at least one aromatic amine by hydrogenation of at least one nitroaromatic by means of hydrogen, where a liquid phase comprising at least the aromatic amine and a gas phase comprising at least hydrogen are present, in the presence of a catalyst suspended in the liquid phase at a temperature of from 50 to 250° C. and a pressure of from 5 to 50 bar, wherein the pressure in the reactor is kept essentially constant by continuous adaptation of the amount of hydrogen fed to the reactor, the total amount of hydrogen fed to the reactor is monitored and the introduction of the at least one nitroaromatic is interrupted if the hydrogen uptake in the reactor is not at least 50 mol % of the amount of hydrogen required for stoichiometric reaction of the at least one nitroaromatic to form the at least one aromatic amine. | 08-15-2013 |
20130296610 | CHEMICAL REACTOR HAVING WOVEN WIRE MESH PRODUCT AS A RETAINING DEVICE FOR PARTICLES - In a chemical reactor for heterogeneously catalysed reaction of a fluid, comprising a holding device for catalyst particles and/or inert particles ( | 11-07-2013 |
20140046096 | PROCESS FOR PURIFYING ANILINE FROM GAS PHASE HYDROGENATIONS - The invention relates to a process for purifying aniline produced by gas-phase hydrogenation of nitrobenzene, by fractional condensation of the crude reaction product obtained in gaseous form so that at least two liquid process products, a partial condensate (PK) and a total condensate (TK), are obtained, wherein the condensation leading to the formation of PK is carried out at higher temperature than the temperature leading to the formation of TK, a product stream originating from PK and a product stream originating from TK are each passed separately from one another into a distillation column consisting of at least one stripping section and at least one rectifying section, wherein the product stream originating from PK is introduced into the lower section of the distillation column between the lowermost stripping section and the section which follows, and the product stream originating from TK is introduced into the top of the distillation column above the uppermost rectifying section, and the desired purified aniline is withdrawn in a side stream between the lowermost stripping section and the uppermost rectifying section of the distillation column. | 02-13-2014 |
20140107378 | PROCESS FOR OBTAINING PURE ANILINE - A process for obtaining pure aniline contains
| 04-17-2014 |
20140200370 | APPARATUS AND PROCESS FOR THE CONTINUOUS REACTION OF LIQUIDS WITH GASES - The present invention relates to an apparatus of the loop Venturi reactor type for the continuous reaction of liquids with gases, in particular for hydrogenations, oxidations or acetylations, e.g. for the preparation of toluenediamine by hydrogenation of dinitrotoluene, and a process for the continuous reaction of liquid reactants with gaseous reactants in the apparatus. Here, the cooling medium surrounds the tubes of the heat exchanger of the apparatus of the invention whereas the reaction takes place in the tubes. | 07-17-2014 |
20150080610 | PROCESS FOR THE PURIFICATION OF ANILINE FROM GASE PHASE HYDROGENATIONS - The present invention relates to a process for the purification of aniline which originates from gas phase hydrogenations. In this process, only a minimum proportion of the aniline has to be evaporated and condensed again. The process is highly efficient in removing compounds which have phenolic hydroxyl groups and results in minimal losses of aniline. This process also reduces the unwanted coupling mechanisms in the division of the overall crude product in the fraction condensation into individual substreams and the subsequent workup of these. | 03-19-2015 |
20150080611 | METHOD FOR STARTING A REACTION DURING THE PRODUCTION OF AROMATIC AMINES FROM NITROAROMATICS - The present invention relates to a method of producing aromatic amines by hydrogenation of aromatic nitro compounds. This method comprises the steps:
| 03-19-2015 |
564421000 | Group VI metal containing catalyst utilized | 8 |
20080234518 | Process for producing aromatic amines - Aromatic amines are produced by adiabatic hydrogenation of nitroaromatic compounds in the gas phase on one or more fixed catalysts. The nitroaromatic reactant is passed over the catalyst under pressure and at elevated temperature with hydrogen, water, optionally nitrogen and substantially in the absence of the aromatic amine produced from the nitroaromatic. | 09-25-2008 |
20100048955 | PROCESS FOR PREPARING AROMATIC AMINES IN A FLUIDIZED-BED REACTOR - A process for preparing aromatic amines by catalytic hydrogenation of the corresponding nitro compound in a fluidized-bed reactor, in which a gaseous reaction mixture comprising the nitro compound and hydrogen flows from the bottom upward through a heterogeneous particulate catalyst forming a fluidized bed, wherein the fluidized bed is provided with internals which divide the fluidized bed into a plurality of cells arranged horizontally in the fluidized-bed reactor and a plurality of cells arranged vertically in the fluidized-bed reactor, with the cells having cell walls which are permeable to gas and have openings which ensure an exchange number of the heterogeneous, particulate catalyst in the vertical direction in the range from 1 to 100 liters/hour per liter of reactor volume, is proposed. | 02-25-2010 |
20100174116 | Activated Base Metal Catalysts - Nitro-compounds are hydrogenated with an activated Ni catalyst that is doped during and/or after activation with one or more elements from the list of Mg, Ca, Ba, Ti, Zr, Ce, Nb, Cr, Mo, W, Mn, Re, Fe, Co, Ir, Ni, Cu, Ag, Au, Rh, Ru and Bi whereas the Ni/Al alloy may not, but preferentially can contain prior to activation one or more doping elements from the list of Ti, Ce, V, Cr, Mo, W, Mn, Re, Fe, Ru, Co, Rh, Ir, Pd, Pt and Bi. If the Ni/Al alloy contained one or more of the above mentioned suitable alloy doping elements prior to activation, the resulting catalyst can then be doped with one or more of the elements from the list of Mg, Ca, Ba, Ti, Zr, Ce, V, Nb, Cr, Mo, W, Mn, Re, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au and Bi by their adsorption onto the surface of the catalyst. | 07-08-2010 |
20100204517 | Activated Base Metal Catalysts - Nitro-compounds are hydrogenated with an activated Ni catalyst that has an average particle size (APS) less than 25 μm and is doped with one or more elements from the list of Mg, Ce, Ti, V, Nb, Cr, W, Mn, Re, Fe, Ru, Co, Rh, Ir, Pt, Cu, Ag, Au and Bi via its/their addition to the alloy before activation and/or doped with one or more elements from the list of Mg, Ce, Ti, V, Nb, Cr, W, Mn, Re, Fe, Ru, Co, Rh, Ir, Ni, Cu, Ag, Au and Bi by their adsorption onto the surface of the activated catalyst. This invention also includes the hydrogenation of nitro-compounds with an activated Ni catalyst that has and APS less than 20 μm and is doped with one or more elements from the list of Mg, Ce, Ti, V, Nb, Cr, W, Mn, Re, Fe, Ru, Co, Rh, Tr, Pt, Pd, Mo, Cu, Ag, Au and Bi via its/their addition to the alloy before activation and/or doped with one or more elements from the list of Mg, Ce, Ti, V, Nb, Cr, W, Mn, Re, Fe, Ru, Co, Rh, Ir, Ni, Cu, Pd, Pt, Mo, Ag, Au and Bi by their adsorption onto the surface of the activated catalyst. | 08-12-2010 |
20110295039 | PROCESS FOR PREPARING TOLUENEDIAMINE BY HYDROGENATION OF DINITROTOLUENE - The invention relates to a process for the continuous preparation of toluenediamine by liquid-phase hydrogenation of dinitrotoluene by means of hydrogen in the presence of a suspended, nickel-comprising catalyst in a reactor with a product isolation unit downstream of the reactor to give a product output from the reactor comprising a liquid phase comprising toluenediamine and dinitrotoluene, in which the nickel-comprising catalyst is suspended, wherein the concentration of dinitrotoluene in the liquid phase of the product output from the reactor in the region between the reactor and the downstream product isolation unit is set to a value in the range from 1 to 200 ppm by weight, based on the total weight of the liquid phase of the product output from the reactor. | 12-01-2011 |
20120065431 | METHOD FOR PRODUCING AROMATIC AMINES - The invention relates to a process for preparing aromatic amines by catalytically hydrogenating the corresponding aromatic nitro compound, which comprises using a copper catalyst with a support comprising SiO | 03-15-2012 |
20130150623 | PROCESS FOR PRODUCING HYDROGEN OR HEAVY HYDROGENS, AND HYDROGENATION (PROTIATION, DEUTERATION OR TRITIATION) OF ORGANIC COMPOUNDS USING SAME - An object is to provide a process for providing hydrogen or heavy hydrogens conveniently without the necessity of large-scale equipment and a process capable of performing hydrogenation (protiation, deuteration or tritiation) reaction conveniently without the use of an expensive reagent and a special catalyst. The production process includes a process for producing hydrogen or heavy hydrogens, containing subjecting water or heavy water to mechanochemical reaction in the presence of a catalyst metal, and a process for producing a hydrogenated (protiated, deuterated or tritiated) organic compound, containing subjecting an organic compound and water or heavy water to mechanochemical reaction in the presence of a catalyst metal. | 06-13-2013 |
20150087862 | METHOD FOR STOPPING A REACTION DURING THE PRODUCTION OF AROMATIC AMINES FROM NITROAROMATICS - The present invention relates to A method for producing aromatic amines by the hydrogenation of aromatic nitro compounds. This method comprises:
| 03-26-2015 |
564422000 | Group VIII metal containing catalyst utilized | 11 |
20090124834 | COMPOSITE MATERIAL COMPOSED OF NANOPARTICLES OF TRANSITION METAL AND MAGNETIC FERRIC OXIDE, A METHODE OF PREPARING THE SAME, AND USES OF THE SAME - A composite material composed of nanoparticles of transition metal(s) and magnetic ferric oxide, a method of preparing the same, and uses of the same are provided. The composite material is substantially composed of nanoparticles of transition metal(s) or alloy thereof and nanoparticles of magnetic ferric oxide, the size of nanoparticles of transition metal(s) or alloy thereof is in the range of 0.7 to 5 nm, the size of nanoparticles of magnetic ferric oxide is in the range of 5 to 50 nm, and the amount of transition metal(s) or alloy thereof is in the range of 0.1 to 30 wt %, based on the total weight of composite material, the magnetic ferric oxide is gamma-Fe | 05-14-2009 |
20100130788 | METHOD FOR PRODUCING AMINES - The invention relates to a process for preparing aromatic amines by catalytic hydrogenation of the corresponding nitro compounds, in particular for preparing toluenediamine by hydrogenation of dinitrotoluene, wherein hydrogenation catalysts in which a mixture of nickel, palladium and an additional element selected from the group consisting of cobalt, iron, vanadium, manganese, chromium, platinum, iridium, gold, bismuth, molybdenum, selenium, tellurium, tin and antimony is present as active component on a support are used. | 05-27-2010 |
20110275858 | METHOD FOR PRODUCING TOLUYLENEDIAMINE BY HYDROGENATING DINITROTOLUENE - A process for preparing tolylenediamine by hydrogenating dinitrotoluene with hydrogen in the presence of a suspended catalyst
| 11-10-2011 |
20160038917 | HYDROGENATION CATALYSTS - Catalysts for hydrogenation comprise a catalytic material and an inorganic matrix component, wherein the catalytic material comprises: at least one metal component comprising a metal selected from the group consisting of copper, manganese, zinc, nickel, cobalt, and iron; and an alkali metal component or an alkaline earth metal component; wherein the inorganic matrix component based on at least a silica sol component and a clay material; wherein the catalytic material and the inorganic matrix component are processed together to form the catalyst; and wherein the catalyst has a mesopore volume in the range of 50-90 by weight % of an overall pore volume. Catalysts are effective for converting acetophenone to methylphenyl carbinol and/or for converting nitrobenzene to aniline. | 02-11-2016 |
564423000 | Group VIII noble metal containing catalyst utilized | 7 |
20100145100 | PROCESS FOR THE PREPARATION OF AMINES - The present invention relates to a process for the preparation of syn-enriched 5-amino-9-isopropyl-benzonorbomene in which the ratio of compounds of formula (Ia(syn)) to compounds of formula (Ib(anti)) is from 70:30 to 99:1, which process comprises reacting a compound of formula (Il) in a pressure vessel with hydrogen in the presence of a palladium catalyst and a solvent, at a pressure of at least 2 bar and a temperature of from 00 C to 45° C., to form syn-enriched 5-amino-9-isopropyl-benzonorbomene. | 06-10-2010 |
20100160686 | Process for the Preparation of Monomers for Polybenzimidazole Materials - A process is provided to produce 2,3,5,6-tetraaminotoluene. Highly pure salts of 2,3,5,6-tetraaminotoluene are produced via reduction of 2,6-diamino-3,5-dinitrotoluene. The 2,3,5,6-tetraaminotoluene salt is precipitated as a clean (>99% purity) product. The salt is a precursor for monomers to make a polybenzimidazole for high performance fibers. | 06-24-2010 |
20100249460 | Fast Filtering Powder Catalytic Mixtures - The catalytic mixture resulting of a metal powder catalyst with a solid material (referred to here as a reaction-aid) that has good filtering properties, does not interfere with the reaction, does not interfere with recycling the catalyst back into the reaction, does not interfere with the refining and recovery of the metal from the catalyst after it is spent, and will not become separated from the catalyst during the preparation of this catalytic mixture, the chemical reaction or the separation of this catalytic mixture from the reaction medium, whereas the ratio of the reaction aid to the catalyst ranges from 0.05 to 20 on a weight basis. A preferred metal powder catalyst is acetylene black supported precious metal. Preferred reaction aids are sibunit powder or activated carbon. The catalytic mixture can be used for the catalytic transformation of compounds, such as the hydrogenation of olefins, or the hydrogenation of nitro compounds. | 09-30-2010 |
20100280271 | PROCESS FOR THE PREPARATION OF AROMATIC AMINES - Nitroaromatic compounds are hydrogenated in the gas phase to form aromatic amines with hydrogen in the presence of one or more catalysts arranged in stationary or virtually stationary beds in a reactor. In this process, the catalyst in the reactor is at least partly replaced continuously or at periodic intervals. At least 10% of the catalyst is replaced within each 20 day interval subsequent to start up of the reaction. | 11-04-2010 |
20130123540 | METHOD FOR PRODUCING 2,5-DIAMINOTOLUENE - The invention relates to a method for producing 2,5-diaminotoluene by catalytic hydrogenation in an aprotic-non-polar solvent or in a mixture made of two or more aprotic-nonpolar solvents with hydrogen in the presence of a catalyst or a mixture of two or more catalysts. The invention further relates to crystalline 2,5-diaminotoluene having characteristic crystal modification. As compared to conventional forms of administration common in industry, this is characterised in that it is largely insensitive to air oxidation. | 05-16-2013 |
20140128638 | PROCESS FOR PREPARING AROMATIC AMINES - The invention relates to a process for the continuous preparation of aromatic amines by hydrogenation of the corresponding nitroaromatics in the presence of catalysts arranged in reaction spaces, in which an adiabatically operated reaction space RA is connected downstream of an isothermally operated reaction space RI and RA additionally also has a separate feed for the nitroaromatic to be hydrogenated, RI is fed with the nitroaromatic to be hydrogenated from the start to the end of the hydrogenation, and the product mixture emerging from RI is fed into RA from the start to the end of the hydrogenation, wherein RA can additionally be fed via the separate feed with the nitroaromatic to be hydrogenated. | 05-08-2014 |
20140309457 | CATALYST AND METHOD FOR PRODUCING AROMATIC AMINES IN THE GAS PHASE - The present invention relates to a catalyst comprising a ceramic support with a BET surface area of less than 40 m | 10-16-2014 |