The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 03, 2006
Filed:
Dec. 19, 2002
Wayne David Picard, Houston, TX (US);
Mark O. Scates, Houston, TX (US);
Stephen Charles Webb, Clear Lake Shores, TX (US);
Duane Lyle Usrey, Paducah, KY (US);
Wayne David Picard, Houston, TX (US);
Mark O. Scates, Houston, TX (US);
Stephen Charles Webb, Clear Lake Shores, TX (US);
Duane Lyle Usrey, Paducah, KY (US);
Celanese International Corporation, Dallas, TX (US);
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.