| 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 |
| 20090270645 | METHOD FOR THE SEPARATION OF NICKEL(0) COMPLEXES AND PHOSPHOROUS-CONTAINING LIGANDS FROM NITRILE MIXTURES - A process for extractively removing nickel(0) complexes having 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 nitrile-containing solution into two phases being effected, by feeding at least one polar additive to the hydrocyanation effluent (feedstream) and/or to the extraction stage. | 10-29-2009 |
| 20090280544 | METHOD FOR PRODUCING OPTICALLY ACTIVE 2-BENZYLOXYCYCLOHEXYLAMINE - The present invention relates to a method for the enantioselective acylation of trans-2-benzyloxycyclohexylamine or cis-2-benzyloxycyclohexylamine, according to which an enantiomer mixture of 2-benzyloxycyclohexylamine is reacted with an acylation agent in the presence of a hydrolase. The invention also relates to a method for producing optically active trans-stereoisomers of 2-benzyloxycyclohexylamine. | 11-12-2009 |
| 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 |
