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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.:

US 4541897 B1

PDFFull Text
Date of Patent:
Sep. 17, 1985

Filed:

Oct. 27, 1982

Distillation process for the production of dehydrated ethanol

Applicant:
Inventors:

August Sommer, Herne, DE;

Rainer Brucker, Castrop-Rauxel, DE;

Wilhelm Heitmann, Herne, DE;

Norbert Wozny, Marl, DE;

Assignee:

Chemische Werke Huls Aktiengesellschaft, Marl, DE;

Attorney:

Oblon, Fisher, Spivak, McClelland & Maier

Primary Examiner:

Frank Sever

Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
203 19 ; 44 53 ; 44 56 ; 203 39 ; 203 69 ; 203D / ; 568916 ;
Abstract

A distillation process for the production of dehydrated ethanol from dilute aqueous solutions of ethanol characterized in that the distillation is performed in a two-column system wherein the first column--for rectification--is operated under such a pressure that the second column--for dehydration--is heated exclusively with the vapors of the first column; in the first column the concentration of the dilute aqueous ethanol is effected to an ethanol concentration below the composition of the binary ethanol-water azeotrope; the separation of water is effected from the lower layer of the condensed head product of the second column; the separation of impurities and entrainers, having a lower boiling point than ethanol, is effected at the head of the first column and that of impurities, having a higher boiling point, above the feed point of the dilute aqueous solution in the first column; and, in the second column, the dehydration is effected by means of entrainers, with the addition of a fuel component or fuel, to which the ethanol is to be added, if required, while separating the aqueous phase as a head product.

Find Patent Forward Citations

Sommer, August. (1985). Distillation process for the production of dehydrated ethanol (U.S. Patent No. 4541897). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4541897

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