Separation of citric acid from gluconic acid in fermentation...

Details Separation of citric acid from gluconic acid in fermentation... Separation of citric acid from gluconic acid in fermentation...

2007-06-04

2008-10-21

Oh, Taylor Victor (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C562S580000

Reexamination Certificate

active

07439392

ABSTRACT:
Citric acid is separated from a fermentation broth containing gluconic acid by using an adsorbent comprising a water-insoluble, macroreticular or gel, strongly or weakly basic anionic exchange resin possessing quaternary or tertiary amine functional groups, said a anionic exchange resin having a cross-linked acrylic or styrene resin matrix and a desorbent comprising water or dilute sulfuric acid. The pH of the feed is maintained below the first ionization constant (pKa1) of citric acid to maintain selectivity.

REFERENCES:
patent: 2664441 (1953-12-01), Owens et al.
patent: 3040777 (1962-06-01), Carson et al.
patent: 3086928 (1963-04-01), Schultz
patent: 3983170 (1976-09-01), Sumikawa et al.
patent: 4323702 (1982-04-01), Kawabaten et al.
patent: 4851573 (1989-07-01), Kulprathipanja et al.
patent: 4851574 (1989-07-01), Kulprathipanja et al.
patent: 5068419 (1991-11-01), Kulprathipanja et al.
patent: 5712131 (1998-01-01), Felman et al.
patent: 7241918 (2007-07-01), Kulprathipanja
patent: 151470 (1985-01-01), None
patent: 868926 (1957-06-01), None
patent: WO 95/32301 (1995-11-01), None
A.J. DeRosset et al., Separation of C8Aromatics by Adsorption A.J. DeRosset et al., presented at the American Chemical Society, Los Angeles, CA Mar. 29-Apr. 2, 1971.

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