Patent · US Active

Method for the production of menthol

US7709688B2 · kind B2 · utility

4Cited by

13References

20Claims

0Family size

Assignee

BASF SE

Inventors

Eike Johannes Bergner · Schriesheim, DE
Klaus Ebel · Lampertheim, DE
Thorsten Johann · Schifferstadt, DE
Oliver Lober · Alzey, DE

Key dates

Filing date	Nov 24, 2005
Grant date	May 4, 2010
Priority date	—
Expiry date	Oct 10, 2026

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C2601/14
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Processes comprising: (a) enantioselectively hydrogenating a staffing material comprising a component selected from geraniol, nerol and mixtures thereof to form optically active citronellol; (b) converting the optically active citronellol to optically active citronellal; (c) cyclizing the optically active citronellal to form a mixture comprising optically active isopulegol; and (d) subjecting the mixture to further processing comprising: (i) separating the optically active isopulegol from the mixture and hydrogenating the separated optically active isopulegol to form optically active menthol; or (ii) hydrogenating the optically active isopulegol in the mixture to form optically active menthol and separating the optically active menthol from the mixture.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.