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:
Aug. 25, 1981
Filed:
Feb. 12, 1980
Applicant:
Inventors:
Martin E Nash, Borger, TX (US);
Edward E Huxley, Borger, TX (US);
Assignee:
Phillips Petroleum Company, Bartlesville, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549 87 ;
Abstract
Prior to hydrogenation to produce sulfolane, a sulfolene feed containing sulfur-containing catalyst poisons is contacted with used and/or at least partially spent Raney nickel catalyst under conditions which substantially remove and/or render innocuous the catalyst poisons. The pretreatment removes sulfur dioxide and polymeric sulfones from the sulfolene which would otherwise contaminate and deactivate the fresh catalyst employed in the hydrogenation.