Iridium-catalyzed carbonylation process for the production of a

Details Iridium-catalyzed carbonylation process for the production of a Iridium-catalyzed carbonylation process for the production of a

1997-12-04

1999-08-03

Barts, Samuel

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

Organic compounds

Carboxylic acids and salts thereof

562520, C07C 5112, C07C 5114

Patent

active

059327642

ABSTRACT:
A process for the production of a carboxylic acid having n+1 carbon atoms comprises (a) carbonylating with carbon monoxide in a first reaction zone at elevated temperature and pressure an alkyl alcohol having n carbon atoms and/or a reactive derivative thereof to produce a carboxylic acid having n+1 carbon atoms in a liquid reaction composition comprising carboxylic acid product, an iridium catalyst, an alkyl halide co-catalyst, water, an ester of the carboxylic acid product and the alkyl alcohol, and optionally one or more promoters, (b) withdrawing from the first reaction zone at least a portion of the liquid reaction composition together with dissolved and/or entrained carbon monoxide, and passing at least a portion of the withdrawn liquid reaction composition and carbon monoxide to a second reaction zone, ((c)reacting at least 1% of the dissolved and/or entrained carbon monoxide in the withdrawn reaction composition by further carbonylation at elevated temperature and pressure in the second reaction zone to produce further carboxylic acid product.

REFERENCES:
patent: 4661624 (1987-04-01), Chang et al.
patent: 5672743 (1997-09-01), Garland et al.
patent: 5773642 (1998-06-01), Denis et al.

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