Process for the desulfurization of a hydrocarbonaceous oil
AssigneeUop LLC
InventorsCarlos A. Cabrera, Tamotsu Imai
Life of this patent
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Abstract
A process for the desulfurization of hydrocarbonaceous oil wherein the hydrocarbonaceous oil is contacted with a hydrodesulfurization catalyst in a hydrodesulfurization reaction zone to reduce the sulfur level to a relatively low level and then contacting the resulting hydrocarbonaceous stream from the hydrodesulfurization zone with an oxidizing agent to convert the residual, low level of sulfur compounds into sulfur-oxidated compounds. The resulting hydrocarbonaceous oil stream containing the sulfur-oxidated compounds is separated after decomposing any residual oxidizing agent to produce a stream containing the sulfur-oxidated compounds and a hydrocarbonaceous oil stream having a reduced concentration of sulfur-oxidated compounds.
Claims24
A process for the desulfurization of a hydrocarbonaceous oil which process comprises:
- (a) contacting said hydrocarbonaceous oil with a hydrodesulfurization catalyst in a hydrodesulfurization reaction zone at hydrodesulfurization conditions to produce hydrogen sulfide and a resulting first hydrocarbonaceous oil stream having a reduced concentration of sulfur;
- (b) contacting said first hydrocarbonaceous oil stream having a reduced concentration of sulfur with an oxidizing agent in a sulfur oxidation zone to convert sulfur-containing compounds into sulfur-oxidated compounds;
- (c) decomposing at least a portion of any residual oxidizing agent from the sulfur oxidation zone effluent;
- (d) separating at least a portion of said sulfur-oxidated compounds from the effluent stream from step (c) to produce a second hydrocarbonaceous oil stream having a reduced concentration of sulfur and a stream comprising sulfur-oxidated compounds;
- and
- (e) recovering said second hydrocarbonaceous oil stream having a reduced concentration of sulfur.
A process for the desulfurization of a hydrocarbonaceous oil which process comprises:
- (a) contacting said hydrocarbonaceous oil with a hydrodesulfurization catalyst in a hydrodesulfurization reaction zone at hydrodesulfurization conditions to produce hydrogen sulfide and a resulting first hydrocarbonaceous oil stream having a reduced concentration of sulfur;
- (b) contacting said first hydrocarbonaceous oil stream having a reduced concentration of sulfur with an aqueous oxidizing solution in an oxidation zone to produce a second hydrocarbonaceous oil stream comprising sulfur-oxidated compounds;
- (c) decomposing at least a portion of any residual aqueous oxidizing solution from the sulfur oxidation zone effluent;
- (d) contacting the effluent stream from step (c) comprising sulfur-oxidated compounds with a selective solvent having a greater solvent selectivity for said sulfur-oxidated compounds than for sulfur-free hydrocarbonaceous oil to produce a solvent containing at least a portion of said sulfur-oxidated compounds and a third hydrocarbonaceous oil stream having a reduced concentration of sulfur-oxidated compounds;
- and
- (e) recovering said third hydrocarbonaceous oil stream.
A process for the desulfurization of a hydrocarbonaceous oil which process comprises:
- (a) contacting said hydrocarbonaceous oil with a hydrodesulfurization catalyst in a hydrodesulfurization reaction zone at hydrodesulfurization conditions to produce hydrogen sulfide and a resulting first hydrocarbonaceous oil stream having a reduced concentration of sulfur;
- (b) contacting said first hydrocarbonaceous oil stream having a reduced concentration of sulfur with an aqueous oxidizing solution in an oxidation zone to produce a second hydrocarbonaceous oil stream comprising sulfur-oxidated compounds;
- (c) decomposing at least a portion of any residual oxidizing solution from the sulfur oxidation effluent;
- (d) contacting the effluent stream from step (c) comprising sulfur-oxidated compounds with a selective solvent having a greater solvent selectivity for said sulfur-oxidated compounds than for sulfur-free hydrocarbonaceous oil to produce a solvent containing at least a portion of said sulfur-oxidated compounds and a third hydrocarbonaceous oil stream having a reduced concentration of sulfur-oxidated compounds;
- (e) separating said solvent containing at least a portion of said sulfur-oxidated compounds produced in step (d) to produce a stream rich in sulfur-oxidated compounds and a lean selective solvent;
- (f) recycling at least a portion of said lean selective solvent produced in step (e) to step (d) to provide at least a portion of said selective solvent;
- and
- (g) recovering said third hydrocarbonaceous oil stream.
Dependencies are inferred from the claim text.