Iridium catalyzed carbonylation process for the production of ac

Details Iridium catalyzed carbonylation process for the production of ac Iridium catalyzed carbonylation process for the production of ac

1997-12-17

1999-03-02

Geist, Gary

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

Organic compounds

Carboxylic acids and salts thereof

562520, C07C 5112, C07C 5110

Patent

active

058773479

ABSTRACT:
A process for the production of acetic acid comprises (1) continuously feeding methanol and/or a reactive derivative thereof and carbon monoxide to a carbonylation reactor containing a liquid reaction composition comprising an iridium carbonylation catalyst, methyl iodide co-catalyst, a finite concentration of water, acetic acid, methyl acetate and, optionally at least one promoter, (2) carbonylating the methanol and/or reactive derivative thereof with the carbon monoxide in the liquid reaction composition to produce acetic acid; and (3) recovering acetic acid from the liquid reaction composition, there being continuously maintained (a) in the liquid reaction composition water at a concentration of no greater than 4.5% by weight, and (b) in the reactor a carbon monoxide partial pressure in the range from greater than 0 to 7.5 bar.

REFERENCES:
patent: 5510524 (1996-04-01), Garland et al.

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