Process for purification of carboxylic acids

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

C - Chemistry, Metallurgy

07

C

C07C 51/48 (2006.01) C07C 51/487 (2006.01) C07C 53/08 (2006.01)

Patent

CA 2057638

Case 7641(2) ABSTRACT OF THE DISCLOSURE PROCESS FOR PURIFICATION OF CARBOXYLIC ACIDS 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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