Patent ID: 7108779
Filing Date: 2006-09-19
Classification: C10G

Abstract:
1. A process for desulfurizing two hydrocarbonaceous feedstocks which process comprises the following steps: (a) reacting a first hydrocarbonaceous feedstock comprising hydrocarbon components boiling above about 343° F. (650° F.) and hydrogen with a desulfurization catalyst in a desulfurization zone operated at desulfurization conditions to produce a desulfurization zone effluent; (b) introducing the desulfurization zone effluent into a vapor-liquid separator operated at a temperature greater than about 288° C. (550° F.) to provide a vaporous stream comprising hydrogen, hydrogen sulfide and lower boiling hydrocarbonaceous compounds boiling up to about 371° C. (700° F.) and a first liquid hydrocarbonaceous stream comprising hydrocarbon components boiling above about 371° C. (700° F.) and having a reduced concentration of sulfur; (c) passing the vaporous stream comprising hydrogen, hydrogen sulfide and lower boiling hydrocarbonaceous compounds boiling up to about 371° C. (700° F.) and a second hydrocarbonaceous feedstock comprising hydrocarbon components boiling below about 371° C. (700° F.) to a hydrocracking zone to produce a hydrocracking zone effluent; (d) passing the hydrocracking zone effluent and a hydrocarbonaceous recycle stream boiling in the range from about 149° C. (300° F.) to about 371° C. (700° F.) to a hydrogenation zone to produce a hydrogenation zone effluent; (e) fractionating the hydrogenation zone effluent to produce an ultra low sulfur hydrocarbonaceous steam boiling in the range from about 149° C. (300° F.) to about 371° C. (700° F.); and (f) fractionating the liquid hydrocarbonaceous steam recovered in step (b) to produce a hydrocarbonaceous recycle stream boiling in the range from about 149° C. (300° F.) to about 371° C. (700° F.) and a second liquid hydrocarbonaceous stream comprising hydrocarbon components boiling above about 371° C. (700° F.) and having a reduced concentration of sulfur.