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:
May. 11, 2010
Filed:
Jun. 02, 2006
William J. Tracy, Iii, Burke, VA (US);
Chuansheng Bai, Phillipsburg, NJ (US);
Robert A. Bradway, Vienna, VA (US);
William E. Lewis, Baton Rouge, LA (US);
Randolph J. Smiley, Baton Rouge, LA (US);
William J. Tracy, III, Burke, VA (US);
Chuansheng Bai, Phillipsburg, NJ (US);
Robert A. Bradway, Vienna, VA (US);
William E. Lewis, Baton Rouge, LA (US);
Randolph J. Smiley, Baton Rouge, LA (US);
ExxonMobil Research & Engineering Company, Annandale, NJ (US);
Abstract
A hydrocracking process for converting a petroleum feedstock to higher gravity, lower sulfur products, especially ultra low sulfur road diesel fuel. The process may be operated as a single-stage or two-stage hydrocracking. In each case, a hydrocracking step is followed directly by a post-treat hydrodesulfurization zone using a bulk multimetallic catalyst comprised of at least one Group VIII non-noble metal and at least two Group VIB metals with a ratio of Group VIB metal to Group VIII non-noble metal is from about 10:1 to about 1:10. In the two-stage option with interstage ammonia removal, the initial hydrocracking step may be followed by hydrodesulfurization using the bulk multimetallic catalyst prior to the ammonia removal which is followed by the second hydrocracking step. A final hydrodesulfurization over the bulk multimetallic catalyst may follow. The hydrodesulfurization over the bulk multimetallic catalyst is carried out at a pressure of at least 25 barg and preferably at least 40 barg.