Patent application number | Description | Published |
20100036154 | PROCESS FOR THE CONTINUOUS PREPARATION OF (CYCLO)ALIPHATIC DIISOCYANATES - The invention relates to a multi-stage process for the continuous, phosgene-free preparation of (cyclo)aliphatic diisocyanates that comprises the conversion of (cyclo)aliphatic diamines into the corresponding (cyclo)alkylene biscarbamates and the thermal cleaving of the latter into the (cyclo)alkylene diisocyanates and alcohol. The urea used in accordance with the invention and also the urea employed for the preparation of urea equivalents (e.g. alkyl carbonates, alkyl carbamates) as a possible precursor for the synthesis of the (cyclo)aliphatic biscarbamates is unconditioned. | 02-11-2010 |
20100041921 | PROCESS FOR PREPARING 3-AMINOMETHYL-3,5,5-TRIMETHYLCYCLOHEXYLAMINE - The invention relates to an improved process for preparing | 02-18-2010 |
20100094058 | METHOD FOR PRODUCTION OF TRIMETHYLHEXAMETHYLENEDIAMINE - Process for preparing trimethylhexamethylenediamine | 04-15-2010 |
20100261237 | FERMENTATIVE PRODUCTION OF ACETONE FROM RENEWABLE RESOURCES BY MEANS OF NOVEL METABOLIC PATHWAY - The invention describes a process for preparing acetone starting from acetyl-coenzyme A comprising process steps A. enzymatic conversion of acetyl-CoA into acetoacetyl-CoA B. enzymatic conversion of acetoacetyl-CoA into acetoacetate and CoA and C. decarboxylation of acetoacetate to acetone and CO | 10-14-2010 |
20100317893 | METHOD FOR PRODUCING DIAMINODIPHENYL ALKANES - The invention relates to a method for producing diaminodiphenyl alkanes, wherein an aromatic amine, which can be substituted or unsubstituted, is reacted with a C1-C3 aldehyde in the presence of a heterogeneous catalyst, said catalyst being a mesoporous acidic ion exchanger based on a divinylbenzene/styrene copolymer and the catalyst having acid centers in a concentration of 2 to 6 eq/kg measured according to DIN 54 403 and the average pore diameter of the catalyst particles being 10 to 32 nm measured according to ASTM D 4222, and the content of polynuclear compounds in the reaction mixture being >10 and ≦15% by weight. | 12-16-2010 |
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 |
20120101304 | CELLS AND METHOD FOR PRODUCING ACETONE - The invention relates to cells and a method for producing acetone. | 04-26-2012 |
20130253226 | PROCESS FOR PREPARING 3-AMINOMETHYL-3,5,5-TRIMETHYLCYCLOHEXYLAMINE - The invention relates to an improved process for preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine, referred to hereinafter as isophoronediamine or, in abbreviated form, IPDA, by: I. preparation of isophorone by catalyzed aldol condensations with acetone as reactant; II. reaction of isophorone with HCN to form isophoronenitrile (IPN, 3-cyano-3,5,5-trimethylcyclohexanone); III. catalytic hydrogenation and/or catalytic reductive amination (also referred to as aminative hydrogenation) of 3-cyano-3,5,5-trimethylcyclohexanone, hereinafter called isophoronenitrile or, in abbreviated form, IPN, to give the isophoronediamine. | 09-26-2013 |
20130261341 | PROCESS FOR PREPARING 3-AMINOMETHYL-3,5,5-TRIMETHYLCYCLOHEXYLAMINE - The invention relates to an improved process for preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine, referred to hereinafter as isophoronediamine or IPDA for short, by means of catalytic hydrogenation and/or catalytic reductive amination (also referred to as aminating hydrogenation) of | 10-03-2013 |
20130261343 | METHOD FOR PRODUCING ISOPHORONE - The invention relates to a method for producing isophorone by catalyzed aldol condensation of acetone as an educt, reprocessing the reaction product, hydrolyzing the product stream, and separating into an organic and an aqueous fraction, obtaining isophorone from the organic fraction, distillatively reprocessing the aqueous fraction, and feeding the vapors from the head of the distillative reprocessing apparatus into the hydrolysis apparatus. | 10-03-2013 |
20140021141 | RADIAL PIPE REACTOR - An arrangement for addition of chlorine dioxide to flowing water in a pipeline is provided. The reactants are reacted in a reaction chamber located in the flow of water and the chlorine dioxide is passed from the reaction chamber directly into the flowing water. | 01-23-2014 |
20140113341 | ABE FERMENTATION METHOD COMPRISING PRODUCT ABSORPTION THROUGH ISOPHORON - The invention relates to a method comprising the following method steps: A) providing an aqueous solution comprising microorganisms producing low-molecular, organic compounds; B) introducing at least one gas or gas mixture into the aqueous solution; C) recovering the gas flow through a compound comprising an isophoron; and optionally D) separating the low-molecular, organic compound from the composition comprising the isophoron. | 04-24-2014 |
20140114085 | PROCESS FOR PREPARING 3-CYANO-3,5,5-TRIMETHYLCYCLOHEXANONE - The present invention refers to the preparation of 3-cyano-3,5,5-trimethylcyclohexanone (isophorone nitrile, abbreviation IPN) using a calcium alkoxide, particularly calcium ethoxide, as catalyst. | 04-24-2014 |
20140302176 | METHOD OF TREATING WATER WITH CHLORINE DIOXIDE - The present invention relates to a method of preparing chlorine dioxide (ClO | 10-09-2014 |