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:
Feb. 05, 2019
Filed:
Nov. 14, 2014
Bi-zeng Zhan, Albany, CA (US);
Horacio Trevino, Richmond, CA (US);
Theodorus Ludovicus Michael Maesen, Moraga, CA (US);
Guan-dao Lei, Richmond, CA (US);
Bi-Zeng Zhan, Albany, CA (US);
Horacio Trevino, Richmond, CA (US);
Theodorus Ludovicus Michael Maesen, Moraga, CA (US);
Guan-Dao Lei, Richmond, CA (US);
Chevron U.S.A. Inc., San Ramon, unknown;
Abstract
A process is provided for producing a heavy lubricating base oil by hydrocracking a lubricating oil feedstock at high yield. The lubricating oil feedstock contains a hydroprocessed stream that is difficult to process using a conventional catalyst system. The catalyst used in the process includes a mixed metal sulfide catalyst that comprises at least one Group VIB metal and at least one Group VIII metal. The process also provides for hydroisomerization and hydrofinishing process steps to prepare the lubricating base oil.