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Process for Oxidative Desulfurization and Sulfone Disposal Using Solvent Deasphalting

  • US 20120055843A1
  • Filed: 09/07/2010
  • Published: 03/08/2012
  • Est. Priority Date: 09/07/2010
  • Status: Active Grant
First Claim
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1. 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 containing compounds present in the hydrocarbon feedstock to produce an oxidized hydrocarbon stream that comprises hydrocarbons and oxidized sulfur containing compounds;

    separating the hydrocarbons and the oxidized sulfur compounds in the oxidized hydrocarbon stream by solvent extraction with a polar solvent to produce an extracted hydrocarbon stream and a mixed stream, the mixed stream comprising the polar solvent and the oxidized sulfur containing compounds, wherein the extracted hydrocarbon stream has a lower concentration of sulfur 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 deasphalting unit to produce a deasphalted oil stream and a pitch stream, wherein said pitch stream includes a substantial portion of the oxidized sulfur containing compounds removed from the hydrocarbon feedstock.

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