Patent ID: 6451197
Filing Date: 2002-09-17
Classification: C10G

Abstract:
A process for hydrocracking a hydrocarbonaceous feedstock to produce lower boiling hydrocarbonaceous compounds which process comprises:(a) contacting the hydrocarbonaceous feedstock, a liquid recycle stream having a temperature greater than about 500Â° F. and saturated with hydrogen, and added hydrogen with a metal promoted hydrocracking catalyst in a hydrocracking zone at elevated temperature and pressure sufficient to obtain a substantial conversion to lower boiling hydrocarbons without cooling the lower boiling hydrocarbons; (b) stripping the uncooled lower boiling hydrocarbons from the hydrocracking zone in a hot stripping zone maintained at essentially the same pressure as the hydrocracking zone with a first hydrogen-rich gaseous stream to produce a first gaseous hydrocarbonaceous stream and a first liquid hydrocarbonaceous stream; (c) condensing at least a portion of the first gaseous hydrocarbonaceous stream and separating the same into a second liquid hydrocarbonaceous stream and a second hydrogen-rich gaseous stream; (d) recycling at least a portion of the first liquid hydrocarbonaceous stream to supply at least a portion of the liquid recycle stream in step (a); (e) recycling at least a portion of the second hydrogen-rich gaseous stream from step (c) to supply at least a portion of the added hydrogen in step (a) and at least a portion of the first hydrogen-rich gaseous stream in step (b); (f) introducing at least a portion of the second liquid hydrocarbonaceous stream and hydrogen into a hydrogenation zone; (g) directly introducing the effluent from the hydrogenation zone into the stripping zone as reflux; and (h) recovering at least another portion of the second liquid hydrocarbonaceous stream.