Patent ID: 7074321
Filing Date: 2006-07-11
Classification: C10G

Abstract:
1. An integrated hydrocarbon conversion process for the production of low sulfur fuels wherein the process comprises the steps of: (a) reacting a hydrocarbonaceous feedstock and hydrogen in a hydrocracking zone containing hydrocracking catalyst to produce diesel boiling range hydrocarbons; (b) stripping a hydrocracking zone effluent in a hot, high pressure stripping zone maintained at essentially the same pressure as the hydrocracking zone and a temperature in the range from about 232° C. (450° F.) to about 468° C. (875° F.) with a first hydrogen-rich gaseous stream to produce a first gaseous hydrocarbonaceous stream comprising diesel boiling range hydrocarbons and a first liquid hydrocarbonaceous stream comprising unconverted hydrocarbons; (c) passing the first gaseous hydrocarbonaceous stream comprising diesel boiling range hydrocarbons to a first desulfurization zone containing desulfurization catalyst and producing a desulfurization zone effluent stream; (d) condensing at least a portion of the first desulfurization zone effluent stream to produce a second hydrogen-rich gaseous stream and a second liquid hydrocarbonaceous stream comprising diesel boiling range hydrocarbons; (e) converting at least a portion of the first liquid hydrocarbonaceous stream in a fluid catalytic cracking zone to produce gasoline boiling-range hydrocarbons; (f) reacting at least a portion of the gasoline boiling range hydrocarbons produced in step (e) and a third hydrogen-rich gaseous stream in a second desulfurization zone containing desulfurization catalyst; (g) condensing at least a portion of the second desulfurization zone effluent to produce a fourth hydrogen-rich gaseous stream and a desulfurized gasoline boiling-range hydrocarbon stream; (h) compressing and passing at least a portion of the fourth hydrogen-rich gaseous stream to the hydrocracking zone; (i) passing at least a portion of the second hydrogen-rich gaseous stream to the hydrocracking zone; and (j) recovering a low sulfur diesel product stream and a low sulfur gasoline boiling range hydrocarbon stream.