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. 16, 1989
Filed:
Jul. 28, 1986
Applicant:
Inventors:
Chi-Wen Hung, San Rafael, CA (US);
Bruce E Reynolds, Martinez, CA (US);
Assignee:
Chevron Research Company, San Francisco, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
C10G / ;
U.S. Cl.
CPC ...
2082 / ;
Abstract
We provide a graded catalyst system which is used for removing calcium and sodium from hydrocarbon feed having at least 1 ppm calcium and 1 ppm sodium. It comprises two catalyst zones characterized as having decreasing porosity, increasing activity, and increasing surface to volume ratio in the direction of feed flow through the system. We also disclose a process for using it and a method for selecting catalyst for use therein.