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:
Apr. 01, 2008
Filed:
Oct. 18, 2002
Applicants:
Gro Cederløf, Amsterdam, NL;
Eduard Rudolf Geus, Amsterdam, NL;
Inventors:
Gro Cederløf, Amsterdam, NL;
Eduard Rudolf Geus, Amsterdam, NL;
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 61/00 (2006.01); C07C 4/04 (2006.01); C07C 7/144 (2006.01);
U.S. Cl.
CPC ...
Abstract
A continuous process to separate color bodies and/or asphalthenic contaminants from a hydrocarbon mixture by passing part of the hydrocarbon mixture through a membrane over which membrane a pressure difference is maintained thereby obtaining a hydrocarbon permeate having a reduced content of color bodies and/or contaminants, wherein at regular time intervals the pressure difference over the membrane is substantially lowered.