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:
Nov. 24, 2015
Filed:
Jun. 20, 2013
Kuang-yeu Wu, Plano, TX (US);
Pai-yu Polly Chiang, Dallas, TX (US);
Ji-young Jang, McKinney, TX (US);
Karl Tze-tang Chuang, Edmonton, CA (US);
Kuang-Yeu Wu, Plano, TX (US);
Pai-Yu Polly Chiang, Dallas, TX (US);
Ji-Young Jang, McKinney, TX (US);
Karl Tze-Tang Chuang, Edmonton, CA (US);
AMT International Inc., Plano, TX (US);
Abstract
A carboxylic acid e.g. acetic acid, is recovered from an aqueous feed stream containing the corresponding ester, an alcohol and a small amount of water by catalytically dehydrating the alcohol to the corresponding ether and water, and reacting the water with the ester to generate a liquid carboxylic acid rich product stream. The acid is recovered by distillation. In a second embodiment, additional alcohol and/or water are co-fed with the feed or fed directly to a catalytic distillation column, resulting in a liquid bottom product stream of substantially pure acetic acid and a top distillate stream of substantially pure ether.