| Patent application number | Description | Published |
|---|
| 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 |
| 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 |
| 20110295024 | PROCESS FOR THE PREPARATION OF 2 SUBSTITUTED TETRAHYDROPYRANOLS - The present invention relates to a process for the preparation of 2-substituted 4-hydroxy-4-methyltetrahydropyrans by reacting 3-methylbut-3-en-1-ol(isoprenol) with the corresponding alkenealdehydes in the presence of a strongly acidic ion exchanger with subsequent hydrogenation. Specifically, the present invention relates to a corresponding process for the preparation of 2-isobutyl-4-hydroxy-4-methyltetrahydropyran by reacting isoprenol with prenal, with subsequent hydrogenation. | 12-01-2011 |
| 20110306779 | Process for the Preparation and Isolation of 2-Substituted Tetrahydropyranols - Process for the preparation of 2-substituted 4-hydroxy-4-methyltetrahydropyrans of the formula (I) | 12-15-2011 |
