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US 12,552,997 B2Granted
Targeted disulfide reduction in petroleum matrices
AssigneeChevron U.S.A. Inc.
InventorsStephen J. Harley, Rachel Mohler, Peter Hillman, Samin Sharifiasl
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Abstract
The present invention is directed to a method of selectively reacting and removing disulfides and reducing corrosivity in petroleum matrixes with an acid wash composition.
Claims9
A method of reducing corrosivity in a petroleum matrix comprising:
- (i) selectively reacting a first petroleum matrix comprising disulfides with an aqueous acid wash composition in the presence of a metal to convert the disulfides to mercaptans thereby producing a second petroleum matrix enriched in mercaptans and a spent aqueous acid wash composition;
- (ii) separating the second petroleum matrix from the spent aqueous acid wash composition;
- (iii) contacting the second petroleum matrix with a caustic wash to produce a third petroleum matrix depleted in mercaptans and a spent caustic wash enriched in mercaptans;
- and
- (iv) separating the third petroleum matrix from the spent caustic wash;
- wherein the metal in (i) is selected from the group consisting of magnesium, aluminum, cadmium, copper and nickel.
3 more elements
Dependencies are inferred from the claim text.