Process for the production of acetic acid

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

2007-08-14

2007-08-14

Zucker, Paul A. (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

Reexamination Certificate

active

10514148

ABSTRACT:
A process for the production of acetic acid by carbonylating methanol and/or a reactive derivative thereof in a carbonylation reactor in a liquid reaction composition comprising an iridium carbonylation catalyst, methyl iodide, methyl acetate, water, acetic acid and at least one promoter selected from the group consisting of ruthenium, rhenium and osmium, characterized in that there is also present in the reaction composition a bis-phosphonate compound having the formula (I): wherein R1, R2, R3, R4are independently hydrogen or an organic functional group; Y is an optionally substituted C1-C10alkylene or C6-C10aryl group.

REFERENCES:
patent: 1 099 680 (2001-05-01), None
patent: 1 099 681 (2001-05-01), None

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