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. 12, 1978
Filed:
Oct. 19, 1977
Applicant:
Inventor:
William V Bauer, New York, NY (US);
Assignee:
The Lummus Company, Bloomfield, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10G / ;
U.S. Cl.
CPC ...
208 89 ; 208212 ; 208255 ;
Abstract
A pyrolysis gasoline, containing dienes and mercaptan sulphur is hydrotreated in a first stage in the presence of a non-noble metal catalyst under conditions primarily designed to effect mercaptan sulphur reduction, rather than diene reduction, followed by hydrotreating in a second stage in the presence of a noble metal catalyst to effect the desired reduction in diene value. The two stage treatment results in a stable pyrolysis gasoline product free of excessive polymer requiring no re-distillation, with 'doctor sweet' quality, with the treatment being effected at higher space velocities and lower temperatures than those normally employed.