Process for removing, isolating and purifying dicarboxylic acids

US8957249B2 · kind B2 · utility

Assignee

• thyssenkrupp Uhde GmbH · DE

Inventors

• Wolfgang Tietz · Biendorf, DE
• Joachim Schulze · Soest, DE

Key dates

• Filing date: May 31, 2011
• Grant date: Feb 17, 2015
• Expiry date: Oct 24, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C12P7/46
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for removing, isolating and purifying dicarboxylic acid from fermentation broths, which includes the following steps: 1) removal of the biomass and any solids present from the fermentation broth in two successive stages, 2) removal of the dicarboxylic acid solution from the biomass-free fermentation broth by simulated moving bed (SMB) chromatography, 3) fine purification of the dicarboxylic acid solution, 4) multistage evaporative concentration and crystallization, and 5) separation and drying of the crystals.