Method for eliminating reentry disulfides in a mercaptan...

Details Method for eliminating reentry disulfides in a mercaptan... Method for eliminating reentry disulfides in a mercaptan...

C - Chemistry, Metallurgy

10

G

196/240, 204/53,

C10G 19/08 (2006.01) C07C 319/30 (2006.01) C10G 19/02 (2006.01)

Patent

CA 1291958

"METHOD FOR ELIMINATING REENTRY DISULFIDES IN A MERCAPTAN EXTRACTION PROCESS" ABSTRACT OF THE INVENTION Reentry disulfides are eliminated in a continuous process for treating a sour hydrocarbon stream by extracting the mercaptans contained in said hydrocarbon stream with a disulfide-free alkaline solution in an extraction zone, oxidizing the mercaptans to disulfides in the presence of an oxidation catalyst, separating a major portion of the disulfides from said alkaline solution, reducing the residual disulfides in said alkaline solution to mercaptans and recycling the resulting substantially disulfide-free alkaline solution to the extraction zone. Two ways are disclosed to effect the reduction of the disulfides to mercaptans: 1) hydrogenation with a supported metal catalyst and 2) electrochemical reduction.

552556

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