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. 02, 1983
Filed:
Jun. 24, 1982
Applicant:
Inventors:
Jacobus Eilers, Amsterdam, NL;
Willem H Stork, Amsterdam, NL;
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10G / ;
U.S. Cl.
CPC ...
208 96 ; 208108 ; 208111 ; 208212 ; 208309 ;
Abstract
In the preparation of a heavy oil with a low Ramsbottom Carbon Test (RCT) from a short residue by a two-stage process comprising catalytic hydrotreatment followed by solvent deasphalting and recycle of the asphalt to the first stage, the catalytic hydrotreatment for RCT reduction in the first stage is carried out at such severity that the C.sub.4.sup.- production per percent RCT reduction is kept between defined limits.