Patent · US Expired

Method for the purification of liponic acid

US7091368B2 · kind B2 · utility

0Cited by

0References

8Claims

0Family size

Assignee

BASF SE

Inventors

Ulrike Maier · Mannheim, DE
Martin Klatt · Bad Dürkheim, DE

Key dates

Filing date	Nov 17, 2003
Grant date	Aug 15, 2006
Priority date	—
Expiry date	Nov 17, 2023

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61P43/00
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The invention relates to a process for purifying lipoic acid, which comprises adding to a solution of lipoic acid at least 0.1 times the amount of an adsorbent, based on the mass of lipoic acid to be purified, and subsequently removing the adsorbent. It is possible in this way to provide racemic or nonracemic lipoic acid with an oligomer content below 1% by weight, for example from 0.1 to 1% by weight.

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