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:
Sep. 08, 2015
Filed:
Apr. 26, 2012
Victor J. Johnston, Houston, TX (US);
Radmila Jevtic, Pasadena, TX (US);
David Lee, Seabrook, TX (US);
Adam Orosco, Houston, TX (US);
R. Jay Warner, Houston, TX (US);
Heiko Weiner, Pasadena, TX (US);
Zhenhua Zhou, Houston, TX (US);
Emily Duff, League City, TX (US);
Victor J. Johnston, Houston, TX (US);
Radmila Jevtic, Pasadena, TX (US);
David Lee, Seabrook, TX (US);
Adam Orosco, Houston, TX (US);
R. Jay Warner, Houston, TX (US);
Heiko Weiner, Pasadena, TX (US);
Zhenhua Zhou, Houston, TX (US);
Emily Duff, League City, TX (US);
Celanese International Corporation, Irving, TX (US);
Abstract
The present invention relates to the recovery of alcohols, in particular ethanol, from a crude ethanol product obtained from the hydrogenation of acetic acid using a reduced energy process. The crude ethanol product may be fed to a distillation column in which a substantial portion of the water is removed with the acetic acid in the residue. Additional water may be removed by using a pressure swing adsorption unit, molecular sieve, and/or membrane. Ethanol extraction may also be used to reduce the ethanol concentration in the recycle streams.