Patent · US Expired

Preparation of lactates

US5453365A · kind A · utility

24Cited by

5References

8Claims

0Family size

Assignee

BASF SE

Inventors

Hans-Josef Sterzel · Schifferstadt, DE
Herbert Vogel · Ludwigshafen, DE
Herbert Exner · Waldsee, DE
Detlef Kratz · Heidelberg, DE

Key dates

Filing date	Nov 16, 1994
Grant date	Sep 26, 1995
Priority date	—
Expiry date	Nov 16, 2014

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C67/08
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for the preparation of lactates by fermentation of mixtures containing sugars, conversion of the lactic acid obtained during fermentation to its salts, followed by esterification, in which PA1 a) there is added to the fermentation liquor an alkaline earth metal carbonate or bicarbonate so as to neutralize the resultant lactic acid to a degree of at least 90 mol %, PA1 b) the resulting fermentation liquor is adjusted to pH 7 to 13 by the addition of NH.sub.3 and CO.sub.2 and the resultant precipitates are separated, and PA1 c) the resulting, purified ammonium lactate solution is esterified with an alcohol.

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