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:
Jul. 01, 2014
Filed:
Dec. 20, 2007
Lalit S. Shah, Sugar Land, TX (US);
Christopher A. Powers, Mandeville, LA (US);
James R. Stoy, Houston, TX (US);
Fred D. Brent, Houston, TX (US);
Bruce E. Reynolds, Martinez, CA (US);
Andre R. Da Costa, Bakersfield, CA (US);
Lalit S. Shah, Sugar Land, TX (US);
Christopher A. Powers, Mandeville, LA (US);
James R. Stoy, Houston, TX (US);
Fred D. Brent, Houston, TX (US);
Bruce E. Reynolds, Martinez, CA (US);
Andre R. Da Costa, Bakersfield, CA (US);
Chevron U.S.A. Inc., San Ramon, CA (US);
Abstract
A method of recovering unsupported fine catalyst from heavy oil comprises combining a slurry comprising unsupported fine catalyst in heavy oil with solvent to form a combined slurry-solvent stream. The combined slurry-solvent stream is filtered in a deoiling zone. A stream comprising unsupported fine catalyst and solvent is recovered from the deoiling zone. Unsupported fine catalyst is separated from the stream comprising unsupported fine catalyst and solvent. Filtering in the deoiling zone can comprise filtering the slurry and solvent through a cross-flow microfiltration unit, recovering a retentate stream of the cross-flow microfiltration unit, combining the retentate stream of the cross-flow microfiltration unit with solvent to form a combined retentate-solvent stream, and filtering the combined retentate-solvent stream through a cross-flow microfiltration unit.