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:
Mar. 03, 2015
Filed:
Jul. 13, 2010
Yihui Tom Xu, Newark, DE (US);
William D. Parten, Wilmington, DE (US);
Yihui Tom Xu, Newark, DE (US);
William D. Parten, Wilmington, DE (US);
Butamax Advanced Biofuels LLC, Wilmington, DE (US);
Abstract
A process for recovering butanol from a mixture of a water-immiscible organic extractant, water, butanol, and optionally a non-condensable gas, is provided. The butanol is selected from 1-butanol, isobutanol, and mixtures thereof. An overhead stream from a first distillation column is decanted into two liquid phases. The wet butanol phase is refined in a second distillation column; the aqueous phase is returned to the first distillation column. A portion of the wet butanol phase from the decanter is also returned to the first distillation column. The extractant may be Cto Cfatty alcohols, Cto Cfatty acids, esters of Cto Cfatty acids, Cto Cfatty aldehydes, and mixtures thereof.