Process for purifying a carboxylic acid

Details Process for purifying a carboxylic acid Process for purifying a carboxylic acid

C - Chemistry, Metallurgy

07

C

C07C 53/08 (2006.01) C07C 51/12 (2006.01) C07C 51/44 (2006.01) C07C 51/487 (2006.01)

Patent

CA 2154028

In a process for purifying a carboxylic acid fraction obtained by liquid phase carbonylation of an alkyl alcohol and/or its reactive derivative in which volatile iridium- and/or volatile co-promoter contaminants are converted to involatile forms by contacting with an iodide in the absence of carbon monoxide or at a partial pressure less than that of the carbonylation reaction. The involatile contaminants are then separated from the carboxylic acid.

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