Sulfur removal process
AssigneeBP Corporation North America Inc.
InventorsVivek R. Pradhan, Ptoshia A. Burnett, George A. Huff
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Abstract
A product of reduced sulfur content is produced from an olefin-containing hydrocarbon feedstock which includes sulfur-containing impurities. The feedstock is contacted with an olefin-modification catalyst in a reaction zone under conditions which are effective to produce an intermediate product which has a reduced amount of olefinic unsaturation relative to that of the feedstock as measured by bromine number. The intermediate product is then contacted with a hydrodesulfurization catalyst in the presence of hydrogen under conditions which are effective to convert at least a portion of its sulfur-containing impurities to hydrogen sulfide.
Claims7
A process for producing products of reduced sulfur content from a feedstock, wherein said feedstock contains sulfur-containing organic impurities and basic nitrogen-containing impurities and is comprised of a normally liquid mixture of hydrocarbons which includes olefins, said process comprising:
- (a) removing at least a portion of the basic nitrogen-containing impurities from the feedstock;
- (b) contacting the feedstock with an olefin-modification catalyst in an olefin-modification reaction zone under conditions which are effective to produce a product which has a lower bromine number than that of the feedstock;
- wherein said olefin-modification catalysts is selected from the group consisting of solid phosphoric acid catalysts and acidic polymeric resin catalysts;
- (c) contacting at least a portion of the unfractionated product from said olefin-modification reaction zone with a hydrodesulfurization catalyst in the presence of hydrogen in a hydrodesulfurization reaction zone under conditions which are effective to convert at least a portion of the sulfur in the sulfur-containing impurities of said product to hydrogen sulfide.
Dependencies are inferred from the claim text.