Method for the extraction of low molecular weight mercaptans from petroleum and gas condensates
AssigneeChevron U.S.A. Inc.
InventorsAkhmet Mazgarovich Mazgarov, Azat Faridovich Vildanov, Nailya Gilmutdinovna Bazhirova, Gulnara Burkhanova Niamutdinova, Sergei Nikolaevich Sukhov
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Abstract
Low molecular weight mercaptans are extracted from petroleum (e.g., crude oil) or gas condensate by contacting the mercaptans with oxygen in an aqueous solution of a metal hydroxide in the presence of a cobalt dihalodihydroxydisulfophthalocyanine catalyst. The catalyst is introduced into the crude oil or gas condensate continuously in the form of a catalytic complex in an aqueous solution of a metal hydroxide.
Claims13
A method of extraction of low molecular weight mercaptans from petroleum or gas condensate containing such low molecular weight mercaptans comprising (1) contacting the mercaptans with oxygen in an aqueous solution of a metal hydroxide, in the presence of a cobalt dihalodihydroxydisulfophthalocyanine catalyst, the catalyst being used in an amount within the range of from about 0.5.times.10.sup.-5 to about 2.5.times.10.sup.-5 weight percent based on the weight of the petroleum or gas condensate, the catalyst being introduced into the petroleum or gas condensate continuously in the form of a catalytic complex in an aqueous solution of a metal hydroxide, the extraction method being conducted at a temperature ranging from about 40.degree. to about 60.degree. C. and a pressure ranging from about 1.0 to about 1.4 MPa, and (2) separating the petroleum or gas condensate from the aqueous solution of metal hydroxide.
Dependencies are inferred from the claim text.