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. 08, 1984
Filed:
Aug. 11, 1982
Julian Feldman, Cincinnati, OH (US);
National Distillers and Chemical Corporation, New York, NY (US);
Abstract
A thermally efficient process for recovering an oxygenated organic material, such as ethanol, present in dilute aqueous solution is disclosed which comprises contacting said dilute aqueous solution with at least one inert extractant which is liquid at ambient temperature and pressure, said extractant being selected from the group consisting of unsubstituted and substituted cyclic secondary amines and unsubstituted and substituted aromatic cyclic amines having a distribution coefficient of at least about 0.70 or a separation factor of at least about 1.0. The invention further provides a process for obtaining substantially anhydrous oxygenated organic material from a dilute aqueous solution thereof in which the stream is subjected to liquid-liquid extraction to provide an oxygenated organic material poor raffinate phase and an oxygenated organic material rich extract phase, the oxygenated organic material present in said latter phase is concentrated in a rectifying column to provide an aqueous oxygenated organic material of high concentration and, if desired or necessary, the concentrated stream is azeotropically distilled in an anhydrous column operated under substantially superatmospheric pressure with thermal values recovered from said anhydrous column being used to satisfy part of all of the thermal operating requirements of the rectifying column.