Patent application number | Description | Published |
20080221351 | Method for the Production of Adipodinitrile by Hydrocyanation of 1,3-Butadiene - A process is described for preparing adiponitrile by hydrocyanating 1,3-butadiene over a catalyst, by, in a first process step, hydrocyanating 1,3-butadiene to 3-pentenenitrile over at least one nickel(0) catalyst, and, in a second process step, hydrocyanating 3-pentenenitrile to adiponitrile over at least one nickel(0) catalyst with addition of at least one Lewis acid, wherein at least one of the at least one nickel(0) catalysts used in the particular process steps is transferred into the other process step. | 09-11-2008 |
20080227214 | Method for the Hydrocyanation of 1,3-Butadiene - A process is described for preparing 3-pentenenitrile by hydrocyanating 1,3-butadiene in the presence of at least one catalyst, wherein unhydrocyanated 1,3-butadiene is removed from the effluent of the hydrocyanation and recycled into the process, and the recycled 1,3-butadiene is monitored for the content of hydrogen cyanide. | 09-18-2008 |
20080227998 | Method For Producing 3-Pentenenitrile - A process is described for preparing 3-pentenenitrile, characterized by the following process steps:
| 09-18-2008 |
20080242883 | Method for the Hydrocyanation of Butadiene - A process is described for preparing 3-pentenenitrile by hydrocyanating 1,3-butadiene in the presence of at least one catalyst, wherein the reaction is carried out in a loop reactor having external pumped circulation and jet nozzle for driving the internal circulation. | 10-02-2008 |
20080242885 | Method for Hydrocyanation - A process is described for removing hydrogen cyanide from mixtures comprising pentenenitrile, wherein the removal is effected by an azeotropic distillation of hydrogen cyanide with 1,3-butadiene. | 10-02-2008 |
20080242886 | Continuous Method for the Production of Linear Pentene Nitriles - A process is described for continuously hydrocyanating 1,3-butadiene in the presence of at least one nickel(0) catalyst with chelate ligands, wherein 1,3-butadiene and hydrogen cyanide are used in a molar ratio of from 1.6:1 to 1.1:1. | 10-02-2008 |
20080275266 | Method for the Production of Pentene Nitriles From N-Butane - A process is described for hydrocyanating 1,3-butadiene over at least one nickel(0) complex having phosphorus ligands as a catalyst, wherein the 1,3-butadiene is used in a mixture with n-butane and the mixture contains from 60 to 90% by volume of 1,3-butadiene and from 40 to 10% by volume of n-butane. | 11-06-2008 |
20080281119 | Separation of Nickel(0) Complexes and Phosphorus-Containing Ligands from Nitrile Mixtures - A process for extractively removing nickel(0) complexes having phosphorus ligands and/or free phosphorus ligands from a reaction effluent of a hydrocyanation of unsaturated mononitriles to dinitriles by extraction by means of a hydrocarbon, a phase separation of the hydrocarbon and of the reaction effluent into two phases being effected at a temperature T (in ° C.), | 11-13-2008 |
20080281120 | Method for Producing Linear Pentenenitrile - A process is described for preparing 3-pentenenitrile, characterized by the following process steps:
| 11-13-2008 |
20090187039 | Production of 3-pentenenitrile from 1,3-butadiene - A process is described for preparing 3-pentenenitrile by hydrocyanating 1,3-butadiene, wherein 1,3-butadiene is reacted with hydrogen cyanide in the presence of at least one catalyst and the stream resulting therefrom is purified distillatively, the bottom temperature during the distillation not exceeding 140° C. | 07-23-2009 |
20090281356 | METHOD FOR PRODUCING ORGANIC PHOSPHOROUS COMPOUNDS CONTAINING HALOGENE - Method of producing compounds of the general formula | 11-12-2009 |
20100331564 | METHOD FOR PRODUCING URETHANES COMPOSED OF MONO AND DI-FUNCTIONAL AROMATIC AMINES - The object of the invention is to provide a process for preparing urethanes by reacting aromatic amines with a dialkyl carbonate, wherein the alkyl radical of the organic dialkyl carbonate comprises from 2 to 18 carbon atoms, and the reaction is carried out in the presence of a base. | 12-30-2010 |
20110004012 | METAL CARBAMATES FORMED FROM TOLYLENEDIAMINES - The invention provides metal carbamates of the general formula (I) | 01-06-2011 |
20110015424 | METAL CARBAMATES FORMED FROM DIAMINOPHENYLMETHANE - The invention provides metal carbamates of the general formula (I) | 01-20-2011 |
20110137067 | METHOD FOR PRODUCING URETHANES COMPOSED OF DI-FUNCTIONAL AROMATIC AMINES AND DIALKYL CARBONATES - A process for preparing urethanes by reacting aromatic diamines with a dialkyl carbonate, wherein the alkyl radical of the organic dialkyl carbonate comprises 2-18 carbon atoms and one or more heteroatoms and the reaction is performed in the presence of a catalyst. | 06-09-2011 |
20110166377 | METHOD FOR THE SEPARATION OF PENTENENITRILE ISOMERS - A process is described for separating mixtures of isomeric pentenenitriles, in which at least one isomer is removed from the mixture, wherein the separation of the substance mixtures of isomeric pentenenitriles is effected distillatively under reduced pressure. | 07-07-2011 |
20110178329 | PROCESS FOR PREPARING ISOCYANATES BY THERMAL DISSOCIATION OF CARBAMATES - The invention relates to a process for preparing isocyanates by thermal dissociation of carbamates and separation by distillation of the reaction mixture from the carbamate dissociation, comprising the corresponding isocyanate and the corresponding alcohol, by distillation in a column (K) having an enrichment section (V) and a stripping section (A), where the carbamate (1) is introduced between the enrichment section (V) and the stripping section (A) and the isocyanate is taken off as a constituent of the bottom stream (2) and the alcohol is taken off as a constituent of the overhead stream (3) from the column (K), in the presence of an inert solvent, wherein an intermediate boiler having a boiling point between the boiling point of the isocyanate and the boiling point of the alcohol under the operating conditions of the carbamate dissociation is used as inert solvent and is fed as external runback (4) in liquid form in a purity of >95% by weight, based on the total weight of the external runback (4), in the upper region of the enrichment section (V) and as gaseous, superheated stream (5) into the lower region of stripping section (A) at one or more points. | 07-21-2011 |
20110207634 | PREPARING ETHER CARBOXYLATES - The present invention relates to a process for preparing ether carboxylates. | 08-25-2011 |
20110207651 | PREPARING ETHER CARBOXYLATES - The present invention relates to a process for preparing ether carboxylates. | 08-25-2011 |
20110257431 | PROCESS FOR PRODUCING SIDE PRODUCT-FREE AMINOCARBOXYLATES - The present invention relates to a process for preparing aminocarboxylates, proceeding from amines, by employing a reaction sequence composed of ethoxylation to amino alcohols and subsequent oxidative dehydrogenation to the corresponding aminocarboxylates, especially the alkali metal or alkaline earth metal salts of the complexing agents MGDA (methylglycinediacetic acid), EDTA (ethylenediaminetetra-acetic acid) and GLDA (glutamic acid diacetic acid) or the free acids thereof. | 10-20-2011 |
20110288326 | PROCESS FOR ISOMERIZING CIS-2-PENTENENITRILE TO 3-PENTENENITRILES - A process for isomerizing cis-2-pentenenitrile to 3-pentenenitriles, by isomerizing cis-2-pentenenitrile with amidines, tertiary amines or mixtures thereof as a catalyst at temperatures of 80 to 200° C. and a pressure of 0.01 to 50 bar. | 11-24-2011 |
20120101303 | METHYL-SUBSTITUTED TETA COMPOUNDS - The invention relates to a process for preparing triethylenetetramine substituted by at least one methyl group (Me-TETA or methyl-substituted TETA compounds). Me-TETA is prepared by hydrogenating biscyanomethylimidazolidine (BCMI) in the presence of a catalyst. The present invention further relates to methyl-substituted TETA compounds as such. The present invention further relates to the use of methyl-substituted TETA compounds as a reactant or intermediate in the production of, for example, coatings or adhesives. | 04-26-2012 |
20120178958 | METHOD FOR PRODUCING LINEAR PENTENENITRILE - A method for producing 3-pentenenitrile is provided that includes: (a) isomerizing an educt stream containing 2-methyl-3-butenenitrile on at least one dissolved or dispersed isomerisation catalyst to form a stream (1), which contains the isomerisation catalyst(s), 2-methyl-3-butenenitrile, 3-pentenenitrile and (Z)-2-methyl-2-butenenitrile; (b) distilling the stream (1) to obtain a stream (2) as the overhead product, which contains 2-methyl-3-butenenitrile, 3-pentenenitrile and (Z)-2-methyl-2-butenenitrile and a stream (3) as the bottom product, which contains the isomerisation catalyst(s); (c) distilling the stream (2) to obtain a stream (4) as the overhead product, which is enriched with (Z)-2-methyl-2-butenenitrile in comparison to stream (2), and a stream (5) as the bottom product, which is enriched with 3-pentenenitrile and 2-methyl-3-butenenitrile in comparison to stream (2); (d) distilling stream (5) to obtain a stream (6) as the bottom product, which contains 3-pentenenitrile and a stream (7) as the head product containing 2-methyl-3-butenenitrile. | 07-12-2012 |
20120203022 | METHOD FOR PRODUCING URETHANES - The content of the invention is a process for preparing urethanes by reaction of aromatic amines with a dialkyl carbonate, wherein the alkyl radical of the organic dialkyl carbonate comprises 4-18 carbon atoms and is branched in the 2 position, and the reaction is performed in the presence of a substoichiometric amount of base, based on the amino groups. | 08-09-2012 |
20120209024 | PROCESS FOR COPRODUCING DI- AND/OR POLYISOCYANATES AND GLYCOLS - A process for coproducing di- and/or polyisocyanates and glycols, comprising process stages A, B, C and E for preparing glycols and process stages A, C, D, E, F and G for preparing di- and/or polyisocyanates, | 08-16-2012 |
20120245377 | PROCESS FOR PREPARING ISOCYANATES BY THERMALLY CLEAVING CARBAMATES - A process is proposed for preparing isocyanates by thermally cleaving carbamates to obtain a carbamate cleavage gas comprising the corresponding isocyanate and the corresponding alcohol, which comprises quenching the carbamate cleavage gas in the presence of an ether which functions as an inhibitor for the reverse reaction of the isocyanate with the alcohol. | 09-27-2012 |
20120253072 | PROCESS FOR THE PREPARATION OF AROMATIC FORMAMIDES - The invention relates to a process for the preparation of formamides by reacting aromatic amines with a formic acid ester in the presence of a catalyst, wherein the catalyst is a phosphorus-containing acid or a Lewis-acidic metal salt. | 10-04-2012 |
20120264973 | PROCESS FOR PREPARING AMINOPOLYCARBOXYLATES PROCEEDING FROM AMINO ACIDS - The present invention relates to a process for preparing aminopolycarboxylates proceeding from an amino acid which, in a
| 10-18-2012 |
20120302783 | PROCESS FOR PREPARING AMINOPOLYCARBOXYLATES - What is proposed is a process for preparing aminopolycarboxylates proceeding from the corresponding polyalkanolamines by oxidative dehydrogenation in the presence of a catalyst comprising 1 to 90% by weight of copper, based on the total weight of the catalyst, using a base, which comprises first performing a partial conversion of the polyalkanolamine to a reaction mixture comprising the aminopolycarboxylate at a temperature in the range from 140 to 180° C. until at least 10 to 90 mol % of the polyalkanolamine has been depleted, and then continuing the conversion at elevated temperature. | 11-29-2012 |
20130006013 | PROCESS FOR THE PRODUCTION OF POLYISOCYANATES - The invention provides a multistage process for continuously preparing organic polyisocyanates, preferably diisocyanates, more preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic polyamines with carbonic acid derivatives and alcohols into monomeric polyurethanes of low molecular mass, and the dissociation of said polyurethanes. The invention further provides an associated preparation process in which at certain reaction stages the polyisocyanates prepared and unutilizable residues are removed and reusable by-products and intermediates are recycled to preliminary stages. | 01-03-2013 |
20130053536 | PROCESS FOR PREPARING EDDN AND/OR EDMN AND A PROCESS FOR PREPARING DETA AND/OR TETA - A process for preparing EDDN and/or EDMN by
| 02-28-2013 |
20130053537 | PROCESS FOR REGENERATING RANEY CATALYSTS - A process for regenerating Raney catalysts by treating the catalyst with liquid ammonia with a water content of less than 5% by weight and with hydrogen having a partial pressure of 0.1 to 40 MPa in the temperature range from 50 to 350° C. for at least 0.1 hour. | 02-28-2013 |
20130053538 | PROCESS FOR PREPARING EDFA AND/OR EDMFA AND DETA AND/OR TETA - A process for reacting ethylenediamine (EDA) with formaldehyde to give ethylenediamine-formaldehyde adduct (EDFA) and/or ethylenediamine-monoformaldehyde adduct (EDMFA), which comprises performing the reaction of FA with EDA at a temperature in the range from 20 to 70° C. | 02-28-2013 |
20130053539 | PROCESS FOR PREPARING EDDN AND/OR EDMN AND PROCESS FOR PREPARING DETA AND/OR TETA - A process for preparing EDDN and/or EDMN by conversion of FA, HCN and EDA, the reaction being effected in the presence of water, wherein the reaction mixture from the conversion of EDA, HCN and FA is cooled after leaving the reactor. | 02-28-2013 |
20130053540 | PROCESS FOR PREPARING TETA - A process for preparing TETA and/or DETA by the action of EDDN and/or EDMN with hydrogen in the presence of a catalyst, wherein the catalyst used is a catalyst of the Raney type and the pressure in the course of hydrogenation is in the range from 170 to 240 bar. | 02-28-2013 |
20130053584 | PROCESS FOR PREPARING EDDN AND/OR EDMN BY REACTING EDFA AND/OR EDMFA WITH HCN - A process for reacting ethylenediamine-formaldehyde adduct (EDFA) and/or ethylene-diamine-monoformaldehyde adduct (EDMFA) with hydrogen cyanide (HCN) in a reactor with limited backmixing at a temperature in the range from 20 to 120° C., wherein the residence time in the reactor is 300 seconds or less. | 02-28-2013 |
20130053597 | PROCESS FOR PREPARING EDDN, EDMN, TETA AND DETA - A process for preparing ethylenediaminediacetonitrile (EDDN) and/or ethylenediamine-monoacetonitrile (EDMN) by conversion of formaldehyde (FA), hydrogen cyanide (HCN) and ethylenediamine (EDA), which comprises using stabilizer-free HCN, or HCN which has been stabilized with an organic acid, in the process. | 02-28-2013 |
20130060002 | PROCESS FOR WORKING UP REACTION OUTPUTS FROM THE HYDROGENATION OF EDDN OR EDMN - A process is disclosed for separating the output from the reaction of EDDN or EDMN with hydrogen in the presence of THF, a catalyst, TETA or DETA, water, and optionally organic compounds having higher and lower boiling points than TETA or DETA. Hydrogen is removed, and the output is supplied to a distillation column DK1 in which an azeotrope, optionally comprising organic compounds with a boiling point lower than TETA or DETA, is removed from the top. A product comprising TETA or DETA is removed from the bottom and passed cinto a distillation column DK2, removing THF. A stream comprising TETA or DETA passes from the bottom of DK2. The DK1 azeotrope is condensed. Phase separation is induced by the addition of an organic solvent essentially immiscible with water, and the mixture is separated. The organic phase is recycled into DK1 and the water phase is discharged. | 03-07-2013 |
20130079492 | PROCESS FOR PREPARING EDDN AND EDMN - A process for preparing EDDN and/or EDMN by conversion of FA, HCN and EDA, the reaction being effected in the presence of water, and, after the conversion, water being depleted from the reaction mixture in a distillation column, which comprises performing the distillation in the presence of an organic solvent which has a boiling point between water and EDDN and/or EDMN at the distillation pressure existing in the column or which forms a low-boiling azeotrope with water. | 03-28-2013 |
20130085286 | Unknown - A process for preparing amines of the formula (II) | 04-04-2013 |
20130090452 | PROCESS FOR PREPARING EDDN AND/OR EDMN BY CONVERSION OF FACH AND EDA - A process for reacting formaldehyde cyanohydrin (FACH) with ethylenediamine (EDA) in a reactor with limited backmixing at a temperature in the range from 20 to 120° C., wherein the residence time in the reactor is 300 seconds or less. | 04-11-2013 |
20130090453 | Process for preparing TETA and DETA - A process for preparing TETA and/or DETA by hydrogenating EDDN and/or EDMN with hydrogen in the presence of a catalyst, which comprises preparing EDDN and/or EDMN from FA, HCN and EDA in the presence of toluene as a solvent and performing the hydrogenation in suspension mode in the presence of THF. | 04-11-2013 |
20130144080 | PROCESS FOR OBTAINING A DIALKYL CARBONATE AND AN ALKYLENE GLYCOL - The invention relates to a process for obtaining a dialkyl carbonate and an alkylene glycol from a stream comprising dialkyl carbonate, alkylene carbonate, alkylene glycol and alcohol, comprising the following steps:
| 06-06-2013 |
20130165689 | PROCESS FOR PREPARING ONE OR MORE COMPLEXING AGENTS SELECTED FROM METHYLGLYCINEDIACETIC ACID, GLUTAMIC ACID DIACETIC ACID AND SALTS THEREOF - Process for preparing one or more complexing agents selected from methylglycinediacetic acid, glutamic acid diacetic acid and salts thereof | 06-27-2013 |
20130231495 | METAL CARBAMATES FORMED FROM TOLYLENEDIAMINES - The invention provides metal carbamates of the general formula (I) | 09-05-2013 |
20130281727 | METAL CARBAMATES FORMED FROM DIAMINOPHENYLMETHANE - The invention provides metal carbamates of the general formula (I) | 10-24-2013 |
20130289299 | Process for Isomerization of CIS-2-Pentenenitrile to 3-Pentenenitriles - The present invention relates to an improved process for batchwise or continuous isomerization of cis-2-pentenenitrile to 3-pentenenitriles in the presence of 1,4-diazabicyclo[2.2.2]octane as catalyst. | 10-31-2013 |