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:
Mar. 29, 2016
Filed:
Oct. 25, 2011
Lin LI, Richmond, CA (US);
Zunqing He, San Rafael, CA (US);
Zhen Zhou, Emeryville, CA (US);
King T. NG, Lafayette, CA (US);
Paul E. Hajdu, Benicia, CA (US);
Lin Li, Richmond, CA (US);
Zunqing He, San Rafael, CA (US);
Zhen Zhou, Emeryville, CA (US);
King T. Ng, Lafayette, CA (US);
Paul E. Hajdu, Benicia, CA (US);
Chevron U.S.A. Inc., San Ramon, CA (US);
Abstract
A method for reducing mercaptan concentration in a crude oil is disclosed. The method comprises contacting the crude with a treating solution comprising a hypochlorite solution, whereby the mercaptan sulfur is oxidized and converted to at least one sulfur oxoacid or salt thereof, yielding a treated crude oil having less than 50 ppm mercaptan sulfur and residual organic chloride. The treated crude oil containing residual organic chloride is brought in contact with a caustic solution at a molar ratio of caustic to chloride of 0.1:1 to 50:1, generating an upgraded crude oil with less than 10 ppm organic chloride. In one embodiment, the spent treating solution is recycled to form a regenerated hypochlorite stream for use in the treatment solution.