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US 2003/0147974 A1Published application
Process for obtaining crystalline rosemary acid
AssigneeBoehringer Ingelheim Pharma GmbH & Co. KG
InventorsMarkus Sauter, Carsten Bender
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Abstract
The invention relates to a process for obtaining crystalline rosemary acid from balm, in which the ground-up plant parts are first extracted with an alcohol.
Claims7
Process for obtaining crystalline rosemary acid from balm, wherein the following steps are carried out successively:
- (i) extracting ground-up balm plant material with an alcohol and concentrating the alcoholic extract,
- (ii) taking up the residue obtained in water,
- (iii) extracting the aqueous phase with a nonpolar solvent at a pH>4.4;
- (iv) acidifying the aqueous phase to a pH between 3.5 and 4.3 and extracting the aqueous phase with an ether;
- (v) concentrating the ethereal extract;
- (vi) isolating and purifying the rosemary acid from the residue.
3 more elements
Dependencies are inferred from the claim text.