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:
Jun. 26, 2001
Filed:
Aug. 19, 1999
Applicant:
Inventors:
Assignee:
Nippon Mitsubishi Oil Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10G 6/504 ; C10G 4/504 ;
U.S. Cl.
CPC ...
C10G 6/504 ; C10G 4/504 ;
Abstract
Diesel gas oil feedstock with 1-3 wt % sulfur can be hydrodesulfurized to a diesel gas oil with 0.05 wt % or less sulfur and a Saybolt color of +20 or higher, by defining a hydrogenation region in a fixed bed reactor with a first hydrogenation zone for dibenzothiophene, 1-, 2- and 3-methyldibenzothiophenes, a second hydrogenation zone for 4-methyldibenzothiophene and 4,6-dimethyldibenzothiophene and a third hydrogenation zone for thiols, sulfides and other sulfur-containing substances.