Patent · US Expired

Preparation of optically pure D- and L- lactic acid

US4769329A · kind A · utility

8Cited by

7References

3Claims

0Family size

Assignee

BASF SE

Inventors

Bryan Cooper · Mannheim, DE
Werner Kuesters · Ludwigshafen, DE
Christoph Martin · Dietzenbach, DE
Hardo Siegel · Speyer, DE

Key dates

Filing date	Jun 30, 1982
Grant date	Sep 6, 1988
Priority date	—
Expiry date	Jun 30, 2002

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S435/94
WIPO fieldBiotechnology
WIPO sectorChemistry

Abstract

A process for the preparation of optically pure D- or L-lactic acid by fermentation of an aqueous nutrient medium, which contains nitrogen, vitamins, aminoacids, sugars and trace elements, by means of a microorganism, at pH 4-6, wherein the nutrient medium contains brewers' yeast as the source of nitrogen, vitamins, aminoacids and trace elements.

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