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:
Mar. 23, 2004
Filed:
Jul. 20, 1999
Applicant:
Inventors:
Kenneth J. Del Rossi, Victoria, AU;
David A. Pappal, Haddonfield, NJ (US);
Brenda H. Rose, Tokyo, JP;
Assignee:
Mobil Oil Corporation, Fairfax, VA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10G 4/700 ; C10G 4/500 ;
U.S. Cl.
CPC ...
C10G 4/700 ; C10G 4/500 ;
Abstract
This invention is directed to an extinction recycle naphtha hydrocracking processes. Large pore zeolite catalysts with Constraint Indices less than 2, such as USY or beta, which are loaded with noble metals such as Pt or Pd or with transition metals such as Ni in combination with Mo or W are employed. Preferably, low hydrogen partial pressures, and a feedstock relatively rich in hydrogen and low in aromatics content, are used, in order to extend catalyst cycle length.