Class / Patent application number | Description | Number of patent applications / Date published |
560347000 |
Carbonyl dihalide reactant (e.g., phosgene, etc.)
| 74 |
560345000 |
Carbamate reactant (i.e., reactant contains -O-C(=O)-NH- group (wherein substitution may be made for hydrogen only)
| 15 |
560344000 |
Reactant containing -NH-C(=O)-NH- group (wherein substitution may be made for hydrogen only)
| 8 |
560341000 |
Carbon monoxide utilized | 5 |
20080269515 | Process for the oxidation of a gas mixture containing hydrogen chloride - Chlorine is prepared by catalytic oxidation of a hydrogen chloride stream having a content of sulfur in elemental or bonded form of less than 100 ppm, preferably less than 50 ppm, more preferably less than 5 ppm, most preferably less than 1 ppm, based on the weight of the hydrogen chloride stream. | 10-30-2008 |
20100217035 | PROCESS FOR PREPARING ISOCYANATES - The present invention relates to a process for preparing diisocyanates from diamines and phosgene in the gas phase. | 08-26-2010 |
20120108843 | PROCESS FOR THE PREPARATION OF LIGHT-COLORED IOCYANATES OF A DIPHENYLMETHANEDIISOCYANATE SERIES - The present invention accordingly provides a process for preparing light-coloured polyphenylene-polymethylene polyisocyanates comprising the steps (a) providing an amount of chlorine, (b) separating the chlorine provided in the step (a) to obtain a first chlorine fraction having a content of free and bound bromine and iodine of <50 ppm and a second chlorine fraction having an increased content of free and bound bromine and iodine that depends on the original amount of bromine and iodine in the chlorine provided in step (a) and the separation split, (c) reacting carbon monoxide with at least a portion of the first chlorine fraction to form a first phosgene fraction, (d) reacting carbon monoxide with at least a part of the second chlorine fraction to form a second phosgene fraction, (e) reacting at least a portion of a first phosgene fraction with at least one amine of the diphenylmethane diamine series (MDA) to form the corresponding polyphenylene-polymethylene polyisocyanate (PMDI), and (f) reacting at least a portion of the second phosgene fraction with at least one primary amine with the exception of mono- and polyphenylene-polymethylene polyamines to form an at least one isocyanate-containing reaction solution. | 05-03-2012 |
20120172620 | PROCESS FOR PREPARING LIGHT-COLOURED ISOCYANATES OF THE DIPHENYLMETHANE SERIES - The present invention relates to a process for preparing light-coloured polyphenylene-polymethylene-polyisocyanate (PMDI), comprising the steps (a) providing carbon monoxide and chlorine, (b) reacting carbon monoxide with chlorine to form phosgene, (c) reacting the phosgene from step (b) with at least one primary amine with the exception of mono- and polyphenylene-polymethylene polyamines with an excess of phosgene to form an at least one isocyanate containing reaction solution, and hydrogen chloride, (d) separating excess phosgene from the isocyanate-containing reaction solution obtained in step (c), (e) providing at least one polyphenylene-polymethylene polyamine, and (f) reacting at least a portion of the phosgene separated in step (d) with the at least one polyphenylene-polymethylene polyamine to form the light-coloured polyphenylene-polymethylene polyisocyanate. | 07-05-2012 |
20150353481 | OXIDATIVE CARBONYLATION OF PRIMARY AMINES TO ISOCYCANATES CATALYZED BY GROUP X DIVALENT NOBLE METAL COMPOUNDS OR COMPLEXES - Processes for the preparation of monoisocyanates, diisocyanates or polyisocyanates of the present invention are described which comprises reacting monomeric or oligomeric primary amines or diamines, and carbon monoxide at atmospheric pressure in the presence of a catalytic amount of a compound or a complex of a divalent metal selected from palladium, nickel and platinum, and in the presence of stoichiometric or catalytic quantities of benzoquinone as an oxidant. Isocyanates are produced in high yields and purities. They can be isolated as free isocyanates or as blocked isocyanates by in situ reaction with blocking agents that contain an active hydrogen being attached to oxygen, sulfur or nitrogen. Monoisocyanates and diisocyanates serve as chemical, agricultural or pharmaceutical intermediates. Diisocyanates and polyisocyanates are used to produce polyurethanes, polyureas, polyisocyanurates and related polymers. | 12-10-2015 |
560348000 |
Carbamyl halide reactant (i.e., reactant contains halo-C(=O)-NH- group, wherein substitutuion may be made for hydrogen only) | 1 |
20130079550 | STATIC REACTIVE JET MIXER, AND METHODS OF MIXING DURING AN AMINE-PHOSGENE MIXING PROCESS - This disclosure relates to a static mixer ( | 03-28-2013 |
Entries |
Document | Title | Date |
20090005589 | SYSTEM AND PROCESS FOR PRODUCTION OF TOLUENE DIISOCYANATE - A method for producing toluene diisocyanate is disclosed which comprises forming a dispersion comprising phosgene gas bubbles dispersed in toluene diamine liquid phase, wherein said gas bubbles have a mean diameter less than 1 micron; and subjecting the dispersion to phosgenation reaction conditions, whereby at least a portion of the toluene diamine is phosgenated to form toluene diisocyanate. A system for carrying out the phosgenation of toluene diamine is also disclosed. | 01-01-2009 |
20100010256 | PROCESSES FOR HYDROGEN CHLORIDE OXIDATION USING OXYGEN - Processes which include: (a) providing a gas phase comprising hydrogen chloride; (b) oxidizing the hydrogen chloride in a reactor to form a product gas comprising chlorine, unreacted hydrogen chloride and water, the reactor having structural parts with inner surfaces that are contacted during oxidation by one or both of the gas phase and the product gas; (c) cooling the process gas; (d) separating the unreacted hydrogen chloride and water from the product gas; (e) drying the product gas; and (f) separating the chlorine from the product gas; wherein the inner surfaces of the reactor structural parts that are contacted during oxidation by one or both of the gas phase and the product gas are comprised of a nickel material having a nickel content of at least 60 wt. %, are described. | 01-14-2010 |
20100185011 | PROCESS FOR PREPARING MIXTURES OF DIPHENYL-METHANE DIISOCYANATES AND POLYPHENYL-POLYMETHYLENE POLYISOCYANATES - The present invention relates to a process for preparing mixtures of diphenylmethane diisocyanates and polyphenyl polymethylene polyisocyanates by sequential reaction of benzene to nitrobenzene to aniline to polyphenyl polymethylene polyamines to polyphenyl polymethylene polyisocyanates wherein the benzene used as the starting material contains 500 to 5000 ppm w/w toluene and/or xylenes. | 07-22-2010 |
20110021810 | METHOD FOR PREPARING ISOCYANATES BY LIQUID-PHASE THERMAL CRACKING - The present invention discloses a method for preparing isocyanates by liquid-phase catalytic thermal cracking. In this method, in a reaction-rectification thermal cracking reactor, using a catalyst composition comprising a superfine powder metal oxide catalyst and an ionic liquid, an alkyl or aryl dialkylurethane, or multialkylurethane being a reactant is liquid-phase thermal cracked for a reaction time of 0.5-3 h under a reaction temperature of 160-220° C. and an absolute pressure of 1000-8000 Pa so as to prepare the corresponding isocyanate. The invention has the characteristics of low thermal cracking temperature, high yield of target products, relatively simple reaction apparatus and good universality for substrates (the yields of HDI, MDI, TDI, HMDI, NDI and IPDI or the like are all >85%) and the like. | 01-27-2011 |
20110028755 | LOW CHLORINE, MULTI-STAGED METHOD FOR PRODUCING CYCLOALIPHATIC DISOCYANATES - Low chlorine, multi-staged method for producing cycloaliphatic diisocyanates. The invention relates to a multi-staged method for the continuous low-chlorine production of cycloaliphatic diisocyanates, comprising the synthesis of diaminodipheynl alkanes, the hydration thereof into the corresponding cycloaliphatic diamines and the subsequent conversion of cycloaliphatic diamines to the corresponding cycloalkylene biscarbamates and the thermal cleaving of the latter into the cycloaliphatic diisocyanates and alcohol. | 02-03-2011 |
20120016154 | PROCESS FOR PREPARING ISOCYANATES - The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the gas phase, if appropriate in the presence of an inert medium, in which the amine and the phosgene are first mixed and converted to the isocyanate in a reactor, and in which a reaction gas which comprises isocyanate and hydrogen chloride and leaves the reactor is cooled in a quench space of a quench by adding a quench medium. The quench medium on addition to the quench space has a temperature above the condensation temperature or the desublimation temperature of the reaction gas. | 01-19-2012 |
20120253063 | PROCESS FOR PREPARING ISOCYANATES - Process for preparing aromatic isocyanates by reacting the corresponding formamides with an oxygen-comprising gas over noble metal catalysts at temperatures of from 300 to 600° C. and a contact time of from 1 to 1000 ms, wherein:
| 10-04-2012 |