Patent application number | Description | Published |
20090163687 | PROCESS FOR PREPARING 3-METHYLBUT-1-ENE - The present invention relates to the preparation of 3-methylbut-1-ene from a hydrocarbon stream I comprising isobutene by feeding a hydrocarbon stream II which comprises at least 70% by mass of isobutene in relation to the olefins present in the hydrocarbon stream and which has been obtained from hydrocarbon stream I or is identical to it to a process step for hydroformylation in which isobutene is hydroformylated in the presence of a rhodium catalyst, hydrogenating the aldehyde obtained from the hydroformylation of isobutene to the corresponding alcohol and preparing 3-methylbut-1-ene by water elimination from the alcohol. | 06-25-2009 |
20090301348 | MIXTURE OF DIESTERS OF DIANHYDROHEXITOL DERIVATIVES WITH CARBOXYLIC ACIDS OF THE EMPIRICAL FORMULA C8H17COOH, PROCESS FOR PREPARING THESE DIESTERS, AND USE OF THESE MIXTURES - The present invention relates to a mixture comprising diesters of the formula (I) where R | 12-10-2009 |
20100137486 | MIXTURE OF ALICYCLIC POLYCARBOXYLIC ESTERS HAVING HIGH CIS CONTENT - The present invention relates to mixtures of alicyclic polycarboxylic esters with high cis content, to a process for their preparation by ring-hydrogenation of the corresponding aromatic polycarboxylic esters, and also to the use of the mixtures. | 06-03-2010 |
20100210880 | MULTISTAGE CONTINUOUS PROCESS FOR THE HYDROFORMYLATION OF HIGHER OLEFINS OR OLEFIN MIXTURES - The invention relates to a process for the continuous preparation of aldehydes and/or alcohols having at least 6 carbon atoms by multistage hydroformylation of olefins or olefin mixtures having at least 5 carbon atoms in the presence of unmodified cobalt complexes, in which at least two reactors are operated at different temperatures in the temperature range from 100 to 220° C. and pressures of from 100 to 400 bar, which is characterized in that
| 08-19-2010 |
20100249464 | ONE-STAGE CONTINUOUS PROCESS FOR HYDROFORMYLATING HIGHER OLEFINS OR OLEFIN MIXTURES - The invention relates to a one-stage continuous process for hydroformylating olefins having at least 5 carbon atoms to the corresponding aldehydes and/or alcohols having at least 6 carbon atoms in the presence of unmodified cobalt catalysts in a process in which, in the presence of an aqueous phase and of an organic phase, catalyst formation, catalyst extraction and hydroformylation proceed in the same reactor, which is characterized in that more aqueous cobalt salt solution is fed into the reactor as an aqueous phase with the liquid reaction mixture and is discharged from the reactor with the gas phase, and in that the level of the aqueous bottom phase is kept constant by continuously conducting a portion of the aqueous bottom phase out of the reactor. | 09-30-2010 |
20110060169 | HYDROGENATION CATALYST AND PROCESS FOR PREPARING ALCOHOLS BY HYDROGENATION OF CARBONYL COMPOUNDS - The invention relates to a hydrogenation catalyst which comprises a support material and at least one hydrogenation-active metal and in which the support material is based on titanium dioxide, zirconium dioxide, aluminium oxide, silicon oxide or mixed oxides thereof and the hydrogenation-active metal is at least one element from the group consisting of copper, cobalt, nickel, chromium, wherein the support material contains the element barium. | 03-10-2011 |
20110130595 | PROCESS FOR PREPARING C5 ALDEHYDE MIXTURES WITH A HIGH N-PENTANAL CONTENT - A process for preparing a C | 06-02-2011 |
20120035382 | METHOD FOR SEPARATION AND PARTIAL RETURN OF RHODIUM AND CATALYTICALLY EFFECTIVE COMPLEX COMPOUNDS THEREOF FROM PROCESS STREAMS - The invention relates to a method for separating and partially returning transition metals and/or catalytically effective complex compounds thereof from a reaction mixture by combining one at least one-stage membrane separation and an adsorption, wherein a current comprising a catalyst, comprising a transition metal, is divided over at least one one-stage membrane separation step in a transition metal enriched retentate stream that resupplies the reaction mixture and a transition metal depleted permeate stream and the transition metal depleted permeate stream is further supplied to an adsorption step. The invention further relates to a method for producing tridecanals. | 02-09-2012 |
20120046503 | METHOD FOR ENRICHING A HOMOGENEOUS CATALYST FROM A PROCESS FLOW - The invention relates to a method for enriching a homogenous catalyst from a process flow comprising said homogenous catalyst as a component, wherein the process flow is conducted over at least one membrane and wherein the membrane wholly or partially comprises a polymer that has planar polymer units connected to one another via a rigid link and wherein the linker is contorted, such that at least one planar polymer unit is connected to at least one second planar polymer unit via the link, in a non-co-planar arrangement. The invention furthermore relates to a method for producing tridecanal. | 02-23-2012 |
20120116140 | WORK-UP OF A 3-METHYL-1-BUTENE-CONTAINING MIXTURE - The invention is a method for processing a mixture containing water, 3-methyl-1-butene and at least one other methylbutene. The method comprises primary distillation of the mixture, giving a gaseous primary overhead product containing methylbutene and water and a water-free primary bottom product containing 3-methyl-1-butene; condensation of the gaseous primary overhead product so as to give a condensate comprising a liquid aqueous phase and a liquid organic phase; separation of the condensate into a liquid aqueous phase and a liquid organic phase; discharge of the liquid aqueous phase; recirculation of the organic phase to the primary distillation; and finally secondary distillation of the water-free primary bottom product from the primary distillation so as to give a secondary overhead product comprising 3-methyl-1-butene and a secondary bottom product. The secondary overhead product obtained has a purity which enables it to be used directly as monomer or comonomer for preparing polymers or copolymers. | 05-10-2012 |
20120123169 | PROCESS FOR PREPARING ALPHA,BETA-UNSATURATED C10-ALDEHYDES - The invention relates to a method for continuously producing α,β-unsaturated C | 05-17-2012 |
20120136186 | METHOD FOR PRODUCING LOW-ODOR N-BUTANE - The invention relates to a method for producing low-odor n-butane by catalytic hydrogenation of a feed mixture. The aim of the invention is to provide such a method, wherein the feed material, in addition to n-butane, n-butene and up to 1 mass % formic acid and/or up to 1 mass % pentanals and/or up to 0.5 mass % pentanols, also comprises carbon monoxide. The aim is achieved by treating the feed mixture in the temperature range of 15 to 120° C. with an aqueous solution of an alkali metal or alkaline earth metal hydroxide in the concentration range of 0.5 to 30 mass % and subsequently subjecting the feed mixture to the catalytic hydrogenation. | 05-31-2012 |
20120136190 | PRODUCTION OF 3-METHYLBUT-1-EN BY MEANS OF DEHYDRATION OF 3-METHYLBUTANE-1-OL - The invention relates to a process for preparing 3-methyl-1-butene by dehydration of 3-methyl-1-butanol over an aluminium-containing oxide in the temperature range from 200 to 450° C. in the gas phase or mixed liquid/gas phase, characterized in that an aluminium-containing oxide having a predominantly mesoporous pore structure whose: | 05-31-2012 |
20120172624 | PROCESS FOR PREPARING DECANECARBOXYLIC ACIDS - The invention relates to a process for preparing a mixture of isomeric decane-carboxylic acids, which comprises the following steps: | 07-05-2012 |
20120190895 | PRODUCING ALPHA,BETA-UNSATURATED ALDEHYDES BY MEANS OF A REACTION MIXING PUMP - The invention relates to a method for producing α,β-unsaturated aldehydes, wherein a catalytic aldol condensation of charged aldehydes is carried out in the presence of an aqueous base within a continuous-flow reactor. The aim of the invention is to provide a method for aldolizing aldehydes that can be carried out in a particularly economical manner. The aim is achieved by using a reaction mixing pump as the reactor. | 07-26-2012 |
20120253083 | METHOD FOR PRODUCING DECANOLS BY MEANS OF HYDROGENATING DECENALS - The present invention relates to a method for producing at least one decanol by means of hydrogenating at least one decenal, wherein a first hydrogenation is carried out in the liquid phase on a solid first catalyst, wherein the first catalyst contains copper and nickel. The aim of the invention is to provide a method of the type mentioned above, according to which decenals can be hydrogenated into decanols in high yields even after long operating periods. The content of non-reacted decenals in the hydrogenation discharge in particular should be less than 1500 ppm. Said aim is achieved by carrying out the hydrogenation in two steps, which is to say in a first step in a known manner using a catalyst comprising copper, nickel and optionally chromium and/or barium oxide, and subsequently in a second step using a different catalyst that must be free of copper, chromium and nickel. | 10-04-2012 |
20150018576 | METHOD AND DEVICE FOR THE HYDROFORMYLATION OF ISOBUTENE AND FOR THE SEPARATION OF THE PRODUCT MIXTURE - The invention relates to a method for producing a product mixture ( | 01-15-2015 |