Patent application number | Description | Published |
20080207957 | Method For The Production Of Isopulegol - The present invention relates to a process for the preparation of isopulegol of formula (I): | 08-28-2008 |
20080214877 | Method for the Production of Enriched Isopulegol - The present invention relates to a process for preparing enriched isopulegol by crystallization from a melt comprising isopulegol. The invention relates specifically to a process for preparing enantiomerically enriched n-isopulegol proceeding from optically active isopulegol having a relatively low enantiomeric excess by crystallization from the melt. The invention further relates to a process for preparing menthol proceeding from enantiomerically and/or diastereomerically enriched n-isopulegol prepared by crystallization from the melt. | 09-04-2008 |
20100010253 | RECOVERY OF BIS(DIARYLPHENOL) LIGANDS DURING THE PRODUCTION OF ISOPULEGOL - The present invention relates to a method of working up an aluminium-containing reaction product from the production of isopulegol by cyclization of citronellal in the presence of complex compounds, comprising at least one ligand of the formula (I), | 01-14-2010 |
20100016642 | RECOVERY OF PHENOL LIGANDS DURING THE PRODUCTION OF ISOPULEGOL - The present invention relates to a method of working up an aluminum-containing reaction product from the production of isopulegol by cyclization of citronellal in the presence of complex compounds, comprising at least one ligand of the formula (I), | 01-21-2010 |
20100191021 | PROCESS FOR PREPARATION OF MENTHOL BY HYDROGENATION OF ISOPULEGOL - The present invention relates to a process for preparing racemic or optically active menthol by catalytically hydrogenating racemic or optically active isopulegol in the presence of hydrogen and catalysts which comprise nickel-, copper-, zirconium- and molybdenum-containing compounds. The present invention relates specifically to a corresponding process far continuously catalytically hydrogenating L-isopulegol to L-menthol. | 07-29-2010 |
20100204083 | PROCESS FOR THE PREPARATION OF ETHYLGERANONITRILE - The present invention relates to a method of producing ethylgeranonitrile through reaction of ethylheptenone with a deprotonated nitrile and, if appropriate, subsequent saponification and decarboxylation. Moreover, the invention relates to mixtures comprising 3,7-dimethyl-2,6-nonadienenitrile and at least one compound selected from the group of compounds 3,7-dimethyl-3,6-nonadienenitrile and 3-methylene-7-methyl-6-nonenenitrile, and to fragrance compositions comprising these. | 08-12-2010 |
20100206712 | CONTINUOUS PROCESS FOR PREPARING MENTHOL IN PURE OR ENRICHED FORM - The present invention relates to a continuous process for preparing racemic or optically active menthol in pure or enriched form by distillatively separating menthol from substance mixtures which comprise essentially menthol and diastereomers thereof. This distillatiive separation is performed in a dividing wall column with 50 to 300 theoretical plates and one or more side draw points at an absolute operating pressure of 5 to 500 mbar. | 08-19-2010 |
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 |
20100267596 | METHOD FOR IMPROVING THE HYDROLYSIS STABILITY OF IONIC LIQUIDS - The present invention relates to a method for improving the hydrolysis stability of an ionic liquid (IL), in which at least one tertiary amine or one quaternary ammonium compound different from the ionic liquid (IL) is added to an ionic liquid (IL). | 10-21-2010 |
20110118510 | METHOD FOR PRODUCING PHENYLALKANE-1-OLS - The present invention relates to a process for preparing phenylalkan-1-ols in three stages, where an ester condensation in the presence of alkali metal or alkaline earth metal alcoholates is carried out in the first stage. | 05-19-2011 |
20110196176 | PROCESS FOR THE PREPARATION OF M-SUBSTITUTED ALKYLTOLUENES BY ISOMERIZATION WITH IONIC LIQUIDS AS CATALYSTS - The invention relates to a process for the preparation of m-substituted alkyltoluenes of the formula (I) | 08-11-2011 |
20110237684 | Process for preparing 4-cyclohexyl-2-methyl-2-butanol - The present invention relates to a process for preparing 4-cyclohexyl-2-methyl-2-butanol. The process comprises the following steps:
| 09-29-2011 |
20110245544 | PROCESS FOR PREPARING HYDROXY-SUBSTITUTED AROMATIC ALDEHYDES - The present invention therefore relates to a process for preparing an aldehyde of the formula (I) | 10-06-2011 |
20110306702 | USE OF CYCLIC CARBONATES IN EPOXY RESIN COMPOSITIONS - The present invention relates to the use of cyclic carbonates of the formula I or a mixture thereof in epoxy resin compositions and also to epoxy resin compositions which comprise such cyclic carbonates. | 12-15-2011 |
20110319665 | Process for Preparing Substituted 2-Nitrobiphenyls - The present invention relates to a process for preparing substituted 2-nitrobiphenyls and to specific 2-nitrobiphenyls. The invention further relates to a process for preparing 2-aminobiphenyls from such 2-nitrobiphenyls and to a process for preparing (het)arylamides of such 2-aminobiphenyls. | 12-29-2011 |
20120059177 | METHOD FOR PRODUCING 2-SUBSTITUTED TETRAHYDROPYRANOLS - The present invention relates to a process for the preparation of 2-substituted 4-hydroxy-4-methyltetrahydropyranols by reacting 3-methylbut-3-en-1-ol (isoprenol) with the corresponding aldehydes in the presence of a strongly acidic cation exchanger. Specifically, the present invention relates to a corresponding process for the preparation of 2-isobutyl-4-hydroxy-4-methyltetrahydropyran by reacting isoprenol with isovaleraldehyde. | 03-08-2012 |
20120083630 | PREPARATION OF HOMOALLYL ALCOHOLS IN THE PRESENCE OF NONCOVALENTLY SUPPORTED IONIC LIQUID PHASE CATALYSTS UNDER GAS-PHASE REACTION CONDITIONS - Process for preparing homoallyl alcohols by catalyzed reaction of alkenes with aldehydes or ketones, wherein the reaction is carried out in the gas phase in the presence of noncovalently supported ionic liquid phase catalysts. | 04-05-2012 |
20120088935 | PROCESS FOR PREPARING KETONES, IN PARTICULAR MACROCYCLIC KETONES - Ketones of the formula II | 04-12-2012 |
20120101306 | PROCESS FOR THE PREPARATION OF 1-METHYLCYCLOPENTANE DERIVATIVES - Process for the preparation of 1-methylcyclopentene by thermal reaction of cyclohexanol or cyclohexene or mixtures of both compounds to give 1-methylcyclopentene, wherein the resulting by-products 3-methylcyclopentene and 4-methylcyclopentene (double-bond isomers of 1-methylcyclopentene) are returned to the reaction. | 04-26-2012 |
20120101307 | PROCESS FOR THE PREPARATION OF 1-METHYL-1-ALKOXYCYCLOPENTANES - Process for the preparation of cyclopentane derivatives of the formula I | 04-26-2012 |
20120203013 | PROCESS FOR THE OXIDATION OF MESITOL - The invention relates to a process for the oxidation of mesitol with singlet oxygen, which is released from hydrogen peroxide, this release taking place in the presence of a bismuth compound as catalyst. In the process, 2,4,6-trimethylquinol is formed in high yield and selectivity as product, which can be used in further reactions for the synthesis of vitamins and in particular of vitamin A and vitamin E. | 08-09-2012 |
20120209030 | PROCESS FOR PREPARING M- OR P-SUBSTITUTED PHENYLALKANOLS BY ALKYLATION - The invention relates to a process for the preparation of m- or p-substituted phenylalkanols of the formula (I) | 08-16-2012 |
20120209031 | METHOD FOR PRODUCING M-SUBSTITUTED PHENYLALKANOLS BY MEANS OF ISOMERIZATION - The invention relates to a process for the preparation of m-substituted phenylalkanols of the formula (I) | 08-16-2012 |
20130005641 | MACROCYCLIC LACTONES - The present invention relates to novel macrocyclic lactones, to processes for their preparation and to their use as fragrances and also to products comprising the novel macrocyclic lactones. | 01-03-2013 |
20130005994 | PROCESS FOR THE PREPARATION OF CYCLIC ENOL ETHERS - The present invention relates to a process for the preparation of cyclic enol ethers. | 01-03-2013 |
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 |
20130072726 | PROCESS FOR PREPARING 4-CYCLOHEXYL-2-METHYL-2-BUTANOL - A process for preparing 4-cyclohexyl-2-methyl-2-butanol, comprising:
| 03-21-2013 |
20130137893 | PROCESS FOR PREPARING AND PURIFYING SALTS OF ACRYLAMIDO-2-METHYLPROPANESULFONIC ACID - A process for preparing salts of acrylamido-2-methylpropanesulfonic acid (A) using the steps of:
| 05-30-2013 |
20130245132 | PROCESS FOR PREPARING 4-CYCLOHEXYL-2-METHYL-2-BUTANOL - Process for preparing 4-cyclohexyl-2-methyl-2-butanol
| 09-19-2013 |
20140158515 | CONTINUOUS PROCESS FOR PREPARING MENTHOL IN PURE OR ENRICHED FORM - The present invention relates to a continuous process for preparing racemic or optically active menthol in pure or enriched form by distillatively separating menthol from substance mixtures which comprise essentially menthol and diastereomers thereof. This distillative separation is performed in a dividing wall column with 50 to 300 theoretical plates and one or more side draw points at an absolute operating pressure of 5 to 500 mbar. | 06-12-2014 |