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. 20, 1977
Filed:
Mar. 23, 1976
Hans-Martin Weitz, Bad Duerkheim, DT;
Ulrich Wagner, Limburgerhof, DT;
Klaus Volkamer, Frankenthal, DT;
Eckart Schubert, Ludwigshafen, DT;
Friedhelm Bandermann, Hern, DT;
BASF Aktiengesellschaft, Ludwigshafen, DT;
Abstract
1,3-Butadiene is recovered with the aid of a selective solvent from a C.sub.4 -hydocarbon mixture containing 1,3-butadiene, hydrocarbons which are more soluble in said selective solvent than 1,3-butadiene, including acetylenes and possibly 1,2-butadiene and C.sub.5 -hydrocarbons, and hydrocarbons which are less soluble in said selective solvent than 1,3-butadiene. The C.sub.4 -hydrocarbon mixture is separated by the use of one or more extractive distilling zones into a distillate containing the less soluble hydrocarbons, a stream consisting of 1,3-butadiene and a stream containing the more soluble hydrocarbons including the higher acetylenes and 1,3-butadiene, the latter stream being subjected to catalytic hydrogenation.