Integrated process for producing carbonylation acetic acid,...

Details Integrated process for producing carbonylation acetic acid,... Integrated process for producing carbonylation acetic acid,...

2006-08-23

2010-10-12

Zucker, Paul A (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

C562S893000

Reexamination Certificate

active

07812192

ABSTRACT:
The present invention is directed to using methyl acetate from a vinyl acetate-based or a vinyl- or ethylene-alcohol based polymer or copolymer process directly for use in a methanol carbonylation production process to produce acetic acid, acetic anhydride, or a coproduction of each. Methyl acetate is a by-product of commercial polyvinyl-alcohol or alkene vinyl alcohol copolymer-based processes. Generally, this material is processed to recover methanol and acetic acid. Discussed herein is a cost-saving scheme to by-pass the methyl acetate processing at production or plant facilities and utilize the methyl acetate in an integrated methanol carbonylation unit. The scheme discussed eliminates an expensive hydrolysis step often associated with the polymer process.

REFERENCES:
patent: 2671052 (1954-03-01), Mitchell et al.
patent: 5206434 (1993-04-01), Scates et al.
patent: 60-060107 (1985-04-01), None
patent: 60060107 (1995-04-01), None

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