Process for the production of acetic acid

Details Process for the production of acetic acid Process for the production of acetic acid

2003-05-29

2008-03-11

Zucker, Paul A. (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

Reexamination Certificate

active

07342129

ABSTRACT:
A process for the production of acetic acid by carbonylating methanol and/or a reactive derivative thereof with carbon monoxide in 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, at least one promoter selected from ruthenium, osmium and rhenium and a stablising compound selected from the group consisting of alkali metal iodides, alkaline earth metal iodides, metal complexes capable of generating I−, salts capable of generating I−, and mixtures of two or more thereof wherein the molar ratio of promoter to iridium is greater than 2:1, and the molar ratio of stabilising compound to iridium is in the range [greater than 0 to 5]:1.

REFERENCES:
patent: 5877348 (1999-03-01), Ditzel et al.
patent: 6211405 (2001-04-01), Cheung et al.
patent: 0 849 248 (1998-06-01), None
patent: 0 849 250 (1998-06-01), None

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