Desulfurization and Sulfone Removal Using A Coker
AssigneeSaudi Arabian Oil Company
InventorsAbdennour Bourane, Omer Refa Koseoglu, Stephane Cyrille Kressmann
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Abstract
A method and apparatus for upgrading a hydrocarbon feedstock is provided. The method includes the steps of (a) supplying a hydrocarbon feedstock to an oxidation reactor, wherein the hydrocarbon feedstock is oxidized in the presence of a catalyst under conditions sufficient to selectively oxidize sulfur compounds present in the hydrocarbon feedstock; (c) separating the hydrocarbons and the oxidized sulfur compounds by solvent extraction; (d) collecting a residue stream that includes the oxidized sulfur compounds; and (e) supplying the residue stream to a coker to produce coker gases and solid coke.
Claims21
A method of upgrading a hydrocarbon feedstock, the method comprising the steps of:
- supplying the hydrocarbon feedstock to an oxidation reactor, the hydrocarbon feedstock comprising sulfur containing compounds;
- contacting the hydrocarbon feedstock with an oxidant in the presence of a catalyst in the oxidation reactor under conditions sufficient to selectively oxidize sulfur compounds present in the hydrocarbon feedstock to produce a hydrocarbon stream that comprises hydrocarbons and oxidized sulfur containing compounds;
- supplying the hydrocarbon stream to an extraction vessel and separating the hydrocarbon stream into an extracted hydrocarbon stream and a mixed stream by extracting the hydrocarbon stream with a polar solvent, wherein the mixed stream comprising the polar solvent and the oxidized sulfur containing compounds and wherein the extracted hydrocarbon stream has a lower concentration of the sulfur containing compounds than the hydrocarbon feedstock;
- separating the mixed stream into a first recovered polar solvent stream and a first residue stream;
- and
- supplying the first residue stream to a coker to produce coker vapors and solid coke.
A method for upgrading a hydrocarbon feedstock comprising sulfur containing compounds, the method for upgrading the hydrocarbon feedstock comprising the steps of:
- supplying the hydrocarbon feedstock having a boiling point of up to about 500° C. to reaction zone where the hydrocarbon feedstock is contacted with an oxidant in the presence of a catalyst to oxidize at least a portion of the sulfur containing compounds in the hydrocarbon feedstock and produce an intermediate product stream comprising hydrocarbons and oxidized sulfur containing compounds;
- supplying the intermediate product stream comprising hydrocarbons and oxidized sulfur containing compounds to an extraction vessel wherein the intermediate product stream is contacted with a polar solvent, wherein said polar solvent selectively extracts oxidized sulfur containing compounds from the intermediate product stream, to produce a first hydrocarbon product stream comprising hydrocarbons and having a lower concentration of sulfur containing compounds than the hydrocarbon feedstock and a mixed stream comprising the polar solvent and the extracted oxidized sulfur containing compounds;
- separating the mixed stream by distillation to produce a recovered solvent stream comprising a major portion of the polar solvent, and a residue stream comprising the oxidized sulfur containing compounds;
- supplying the residue stream to a coker to produce a recovered hydrocarbon product stream comprising condensed coker vapors and gas oil and solid coke, wherein the coker includes a coker furnace and a coker drum, and wherein the coker furnace is operated at a temperature of at least about 400° C. and the coker drum is operated at a temperature of at least about 425° C. and a pressure in the range of between about 1 and 50 kg/cm2;
- and
- supplying at least a portion of the recovered solvent stream to the extraction vessel wherein at least a portion of the recovered solvent stream is combined with the polar solvent.
Dependencies are inferred from the claim text.