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:
May. 03, 2016
Filed:
Sep. 16, 2013
Celanese International Corporation, Irving, TX (US);
Trinity Horton Hale, Houston, TX (US);
Radmila Wollrab, Pasadena, TX (US);
Victor J. Johnston, Houston, TX (US);
Tianshu Pan, Houston, TX (US);
R. Jay Warner, Houston, TX (US);
Heiko Weiner, Pasadena, TX (US);
Nathan Bower, Houston, TX (US);
Josefina T. Chapman, Houston, TX (US);
Gerald Grusendorf, Rosharon, TX (US);
CELANESE INTERNATIONAL CORPORATION, Irving, TX (US);
Abstract
In one embodiment, the invention is to a process for purifying a crude ethanol product. The process comprises the step of hydrogenating acetic acid in a reactor in the presence of a catalyst to form the crude ethanol product. The process further comprises the step of separating at least a portion of the crude ethanol product in a purification zone. The purification zone preferably comprises a first column, which yields a first distillate comprising ethanol, water and ethyl acetate, and a first residue comprising acetic acid. The at least a portion of the crude ethanol product has a residence time from the reactor to the purification zone from 5 minutes to 5 days.