Patent ID: 6277271
Filing Date: 2001-08-21
Classification: C10G

Abstract:
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 sulfuroxidated compounds and to produce a sulfur oxidation zone effluent containing a residual oxidizing agent;(c) decomposing at least a portion of said residual oxidizing agent in the sulfur oxidation zone effluent;(d) separating at least a portion of said sulfur-oxidated compounds from the effluent produced in step (c) to produce a second hydrocarbonaceous oil stream having a reduced concentration of sulfur and a stream comprising sulfur-oxidated compounds;(e) recycling at least a portion of said sulfur-oxidated compounds to said hydrodesulfurization reaction zone of step (a); and(f) recovering said second hydrocarbonaceous oil stream having a reduced concentration of sulfur.