Process of preparing an organic acid

US5759826A · kind A · utility

Assignee

• Metallgesellschaft AG · DE

Inventors

• Bernd Ahlers · Dietzenbach, DE
• Rudolf Bönsch · Nackenheim, DE
• Michael Eichelsbacher · Mainz, DE
• Jurgen Kuhn · Frankfurt am Main, DE
• Ulrich Sander · Rebstein, CH
• Jiri Pendl · Plzeň, CZ
• Frantisek Hotek · Podbořany, CZ
• Vaclav Cerny · Kaznějov, CZ

Key dates

• Filing date: Dec 4, 1996
• Grant date: Jun 2, 1998
• Expiry date: Dec 4, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/47
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process is disclosed for preparing an organic acid and/or its salts from a solution obtained through fermentation. In this process, a pure carbohydrate-containing raw material is used. The acid-containing solution prepared by means of fermentation is supplied to a cell separation, and the acid-containing permeate is supplied to a protein precipitation, where it is mixed with a silicon-containing precipitant at temperatures between 2.degree. and 70.degree. C. The solution thus obtained is supplied to a protein separation, and the acid-containing permeate is concentrated and then supplied to a single- or multi-stage crystallization or a granulation.