Process for purifying a carboxylic acid

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

1995-06-02

1997-09-02

Dees, Jose G.

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

Organic compounds

Carboxylic acids and salts thereof

562606, 562607, 562519, C07C 5142, C07C 5308, C07C 5310

Patent

active

056634307

ABSTRACT:
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.

REFERENCES:
patent: 3772380 (1973-11-01), Paulik et al.
patent: 4102921 (1978-07-01), Bartish
patent: 4847406 (1989-07-01), Steinmetz et al.

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