Title:
METHOD FOR REDUCING MERCAPTANS IN HYDROCARBONS
Document Type and Number:
WIPO Patent Application WO/2012/058228
Kind Code:
A3
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 chloride. The treated crude oil containing residual chloride is brought in contact with a caustic solution at a molar ratio of caustic to chloride of 0.05:1 to 1:1, generating an upgraded crude oil with less than 50 ppm chloride. In one embodiment, the spent treating solution is recycled to form a regenerated hypochlorite stream for use in the treatment solution.
Inventors:
LI LIN (US)
HE ZUNQING (US)
ZHOU ZHEN (US)
NG KING T (US)
HAJDU PAUL E (US)
HE ZUNQING (US)
ZHOU ZHEN (US)
NG KING T (US)
HAJDU PAUL E (US)
Application Number:
PCT/US2011/057722
Publication Date:
August 16, 2012
Filing Date:
October 25, 2011
Export Citation:
Assignee:
CHEVRON USA INC (US)
LI LIN (US)
HE ZUNQING (US)
ZHOU ZHEN (US)
NG KING T (US)
HAJDU PAUL E (US)
LI LIN (US)
HE ZUNQING (US)
ZHOU ZHEN (US)
NG KING T (US)
HAJDU PAUL E (US)
International Classes:
C10G27/02; C10G19/08; C25B1/00
Foreign References:
| US20070227950A1 | 2007-10-04 | |||
| JPH091191A | 1997-01-07 | |||
| US4816139A | 1989-03-28 | |||
| US4120779A | 1978-10-17 |
Attorney, Agent or Firm:
PHAM, Hanh T. et al. (Law DepartmentPost Office Box 600, San Ramon California, US)
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