Patent application number | Description | Published |
20080269528 | Method for the Production of Optically Active Carbonyl - The present invention relates to a process for preparing optically active carbonyl compounds by asymmetrically hydrogenating α,β-unsaturated carbonyl compounds in the presence of optically active transition metal catalysts which are soluble in the reaction mixture and have at least one carbon monoxide ligand. The present invention especially relates to a process for preparing optically active aldehydes or ketones, in particular citronellal, by asymmetrically hydrogenating the corresponding optically active α,β-unsaturated aldehydes or ketones. | 10-30-2008 |
20090030235 | METHOD FOR FRACTIONATING STEREOISOMERIC COMPOUNDS - The present invention relates to a method for fractionating stereoisomeric compounds which have at least one alcohol and/or amino group. | 01-29-2009 |
20090227801 | LIGANDS FOR USE IN ASYMMETRIC HYDROFORMYLATION - The invention relates to chiral phosphorus chelate compounds, to catalysts comprising such a compound such a compound as the ligand, and to asymmetric synthesis methods in the presence of such a catalyst. | 09-10-2009 |
20090326226 | METHOD FOR ASYMMETRIC SYNTHESIS - The present invention relates to a process for asymmetric synthesis in the presence of a chiral catalyst comprising at least one complex of a metal of transition group VIII with ligands capable of dimerization via noncovalent bonds, such catalysts and their use. | 12-31-2009 |
20100048959 | METHOD FOR THE HYDROFORMYLATION OF OLEFINS - The present invention relates to a process for preparing hydroformylation products of olefins having at least four carbon atoms, in which a high proportion of both the linear C | 02-25-2010 |
20100152494 | METHOD FOR SYNTHESIZING OPTICALLY ACTIVE CARBONYL COMPOUNDS - The present invention relates to a process for preparing optically active carbonyl compounds by asymmetrically hydrogenating α,β-unsaturated carbonyl compounds in the presence of optically active transition metal catalysts which are soluble in the reaction mixture and have at least one carbon monoxide ligand, the optically active catalyst which has at least one carbon monoxide ligand and is to be used in each case being prepared by pretreating a catalyst precursor with a gas mixture comprising carbon monoxide and hydrogen and the asymmetric hydrogenation being performed in the presence of carbon monoxide supplied additionally to the reaction mixture. | 06-17-2010 |
20100249467 | METHOD FOR PRODUCING OPTICALLY ACTIVE, RACEMIC MENTHOL - The present invention relates to a particularly economic overall method for producing menthol, specifically for producing optically active, essentially enantiomerically and diastereomerically pure L-menthol and racemic menthol, starting from the starting material citral which is available inexpensively on an industrial scale. The method comprises the following steps | 09-30-2010 |
20110028746 | METHOD FOR THE DECARBOXYLATIVE HYDROFORMYLATION OF ALPHA, BETA- UNSATURATED CARBOXYLIC ACIDS - The present invention relates to a process for preparing aldehydes by reacting an α,β-unsaturated carboxylic acid or a salt thereof with carbon monoxide and hydrogen in the presence of a catalyst comprising at least one complex of a metal of transition group VIII of the Periodic Table of the Elements with at least one compound of the formula (I), | 02-03-2011 |
20110045560 | METHOD FOR PRODUCING OPTICALLY ACTIVE 2-METHYL-ALKANOLS - A process for preparing optically active 2-methylalkan-1-ol of the general formula (III) comprising the following steps:
| 02-24-2011 |
20110319657 | Process for the Preparation of Formic Acid - Process for obtaining formic acid by thermal separation of a stream comprising formic acid and a tertiary amine (I), in which a liquid stream comprising formic acid and a tertiary amine (I) in a molar ratio of from 0.5 to 5 is produced by combining tertiary amine (I) and a formic acid source, from 10 to 100% by weight of the secondary components present therein are separated off and formic acid is removed by distillation in a distillation apparatus at a bottom temperature of from 100 to 300° C. and a pressure of from 30 to 3000 hPa abs from the liquid stream obtained, the bottom discharge from the distillation apparatus being separated into two liquid phases and the upper liquid phase being recycled to the formic acid source and the lower liquid phase being recycled for separating off the secondary components and/or to the distillation apparatus. | 12-29-2011 |
20110319658 | PROCESS FOR PREPARING FORMIC ACID BY REACTION OF CARBON DIOXIDE WITH HYDROGEN - A process for preparing formic acid by reaction of carbon dioxide ( | 12-29-2011 |
20120022290 | Process for Preparing Formic Acid by Reaction of Carbon Dioxide with Hydrogen - A process for preparing formic acid by reaction of carbon dioxide ( | 01-26-2012 |
20120071690 | PRODUCTION OF FORMAMIDES - A process is proposed for production of formamides by reaction of carbon dioxide with hydrogen in a hydrogenation reactor I in the presence of
| 03-22-2012 |
20120157711 | PROCESS FOR PREPARING FORMIC ACID BY REACTING CARBON DIOXIDE WITH HYDROGEN - The present invention relates to a process for preparing formic acid by reacting carbon dioxide ( | 06-21-2012 |
20130012739 | PROCESS FOR PREPARING FORMIC ACID BY REACTING CARBON DIOXIDE WITH HYDROGEN - A process for preparing formic acid by reacting carbon dioxide with hydrogen in a hydrogenation reactor in the presence of a catalyst comprising an element of group 8, 9 or 10 of the Periodic Table, a tertiary amine and a polar solvent to form formic acid-amine adducts which are subsequently dissociated thermally into formic acid and tertiary amine. | 01-10-2013 |
20130046118 | METHOD FOR PRODUCING OPTICALLY ACTIVE, RACEMIC MENTHOL - The present invention relates to a particularly economic overall method for producing menthol, specifically for producing optically active, essentially enantiomerically and diastereomerically pure L-menthol and racemic menthol, starting from the starting material citral which is available inexpensively on an industrial scale. The method comprises the following steps
| 02-21-2013 |
20130102807 | PROCESS FOR PREPARING FORMAMIDES AND FORMIC ESTERS - A process for preparing carboxylic acid derivatives of the formula H—(C═O)—R, R is OR | 04-25-2013 |
20130123526 | PROCESS FOR PREPARING FORMIC ACID BY REACTION OF CARBON DIOXIDE WITH HYDROGEN - The invention relates to a process for preparing formic acid by reaction of carbon dioxide with hydrogen in a hydrogenation reactor in the presence of a transition metal complex as a catalyst comprising at least one element from group 8, 9 or 10 of the Periodic Table and at least one phosphine ligand with at least one organic radical having at least 13 carbon atoms, of a tertiary amine and of a polar solvent to form a formic acid-amine, adduct, which is subsequently dissociated thermally to formic acid and the corresponding tertiary amine. on unit. | 05-16-2013 |
20130331607 | PROCESS FOR PREPARING FORMIC ACID - A process for preparing formic acid by hydrogenation of carbon dioxide in the presence of a tertiary amine (I), a diamine (II), a polar solvent and a catalyst comprising gold at a pressure of from 0.2 to 30 MPa abs and a temperature of from 0 to 200° C., wherein the catalyst is a heterogeneous catalyst comprising gold. | 12-12-2013 |
20140024854 | PROCESS FOR PREPARING CARBOXYLIC ACID ESTERS - The present invention relates to a process for preparing carboxylic acid esters, comprising the reaction of at least one primary monoalcohol or of a mixture of a primary monoalcohol and at least one alcohol different therefrom in the presence of a transition metal carbene complex catalyst K which has, as central atom M, at least one transition metal atom of group 8, 9 or 10 of the Periodic Table of the Elements (IUPAC) and at least one monodentate N-heterocyclic carbene ligand, in the presence of a base, wherein the catalyst K is prepared by reacting a transition metal compound V which has at least one transition metal atom of group 8, 9 or 10 of the Periodic Table of the Elements (IUPAC), but no carbene ligand, with an imidazolium salt in the presence of the primary monoalcohol and the base, the reaction being carried out without dilution. | 01-23-2014 |
20140323770 | PROCESS FOR PREPARING 3-SUBSTITUTED 2-ALKENALS, IN PARTICULAR PRENAL - The present invention to a process for preparing 2-alkenals of the formula I | 10-30-2014 |