Process for recovering high-purity organic acid

Details Process for recovering high-purity organic acid Process for recovering high-purity organic acid

1991-09-25

1994-09-20

Dees, Jose G.

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

Organic compounds

Carboxylic acids and salts thereof

562582, 562584, 562589, 562593, 562585, 562607, 562608, C07C 5142

Patent

active

053490843

ABSTRACT:
The present invention relates to a process for inexpensively and effectively recovering a high-purity organic acid, according to which a crude organic acid is subjected to extraction treatment with an organic solvent to obtain an organic solvent extract containing an organic acid; the organic solvent extract is mixed with a high-pressure gas to precipitate and separate impurities thereby obtaining a solution containing a high-purity organic acid; and the organic acid is separated from the solution to obtain a high-purity organic acid.

REFERENCES:
patent: 26415 (1907-11-01), Noerdlinger et al.
patent: 2710880 (1955-06-01), Filachione et al.
patent: 4250331 (1981-02-01), Shimshick
Patent Abstracts of Japan, vol. 14, No. 254 (C-274) (4197), 31 May 1990 of JP-A-2-72,138 (Res. Assoc. Util. of Light Oil) 12 Mar. 1990.

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