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:
Aug. 07, 2012
Filed:
Jul. 21, 2009
Joseph V Nguyen, Albany, CA (US);
Axel Brait, San Rafael, CA (US);
Julie Chabot, Novato, CA (US);
BO Kou, Albany, CA (US);
Erin Maris, Alameda, CA (US);
Rahul S. Bhaduri, Moraga, CA (US);
Alexander E. Kuperman, Orinda, CA (US);
Joseph V Nguyen, Albany, CA (US);
Axel Brait, San Rafael, CA (US);
Julie Chabot, Novato, CA (US);
Bo Kou, Albany, CA (US);
Erin Maris, Alameda, CA (US);
Rahul S. Bhaduri, Moraga, CA (US);
Alexander E. Kuperman, Orinda, CA (US);
Chevron U.S.A. Inc, San Ramon, CA (US);
Abstract
A process for hydroprocessing heavy oil feedstock is disclosed. The process operates in once-through mode, employing a plurality of contacting zones and at least a separation zone to convert at least a portion of the heavy oil feedstock to lower boiling hydrocarbons, forming upgraded products. The contacting zones operate under hydrocracking conditions, employing a slurry catalyst for upgrading the heavy oil feedstock. At least an additive material selected from inhibitor additives, anti-foam agents, stabilizers, metal scavengers, metal contaminant removers, metal passivators, and sacrificial materials, in an amount of less than 1 wt. % of the heavy oil feedstock, is added to at least one of the contacting zones. In one embodiment, the additive material is an anti-foam agent. In another embodiment, the additive material is a sacrificial material for trapping heavy metals in the heavy oil feed and/or deposited coke, thus prolonging the life of the slurry catalyst.