Patent ID: 9574143
Date: 2017-02-21
CPC Classifications: C10B,C10G

Claim:
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 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 non-acidic polar organic solvent, the non-acidic polar organic solvent being dimethylformamide, wherein the mixed stream comprising the non-acidic polar organic 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 using a distillation column into a first recovered non-acidic polar organic solvent stream and a first residue stream; and supplying the first residue stream to a coker to produce coker vapors and solid coke, wherein the hydrocarbon feedstock further comprises nitrogen containing compounds, such that the step of contacting the hydrocarbon feedstock with the oxidant in the presence the catalyst oxidizes at least a portion of the nitrogen containing compounds, and wherein the residue stream supplied to the coker includes the oxidized nitrogen containing compounds; the method further comprising the steps of