Process for purification of carboxylic acids

Details Process for purification of carboxylic acids Process for purification of carboxylic acids

1991-12-11

1995-02-07

Dees, Jose G.

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

Organic compounds

Carboxylic acids and salts thereof

C07C 5142

Patent

active

053877136

ABSTRACT:
Carboxylic acids produced by carbonylation and having iodide and oxidisable impurities are purified by contacting with hydrogen peroxide and recovering the purified acid by distillation or evaporation. Preferably a strong acid such as sulphuric acid is used as a catalyst. Product contamination by sulphur from sulphuric acid and by excess peroxide may be reduced by the use of metal salts in the recovery step.

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Patent Abstracts of Japan, vol. 9, No. 301 (C-316) (2024) 28 Nov. 1985 & JP-A-60 139 641 (DAICEL) 24 Jul. 1985 *abstract*.

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