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. 03, 1992
Filed:
Feb. 20, 1992
Chung-Sung Tan, Taipei, TW;
National Tsing Hua University, Hsingchu, TW;
Abstract
The present invention provides a process for separating ethanol from an aqueous solution by supercritical or near supercritical extraction in combination with reverse osmosis, which includes contacting an ethanol containing aqueous solution with one side of a reverse osmosis membrane in the presence of a supercritical or near supercritical CO.sub.2 having a pressure of 72.8-88.4 atm and a temperature of 26.5.degree.-34.degree. C., wherein the volumetric ratio of the supercritical or near supercritical CO.sub.2 to the ethanol containing aqueous solution is higher than 1.8, and recovering a permeate solution having a lower ethanol concentration from the opposite side of the membrane.