Patent ID: 6106695
Filing Date: 2000-08-22
Classification: C10G

Abstract:
A catalytic hydrocracking process for the continuous conversion of a hydrocarbonaceous feedstock to lower boiling hydrocarbon compounds which process comprises:(a) passing at least a portion of said hydrocarbonaceous feedstock and hydrogen to a first catalytic hydrocracking zone operating at hydrocracking conditions and containing a hydrocracking catalyst, and recovering a hydrocracking zone effluent therefrom;(b) passing hydrogen at hydrocracking catalyst regeneration conditions to a second catalytic hydrocracking zone containing partially spent hydrocracking catalyst to regenerate said second zone;(c) discontinuing the passing of said hydrocarbonaceous feedstock to said first catalytic hydrocracking zone while continuing the flow of hydrogen to regenerate the hydrocracking catalyst contained therein;(d) passing hydrogen sulfide in admixture with said hydrogen during at least a portion of the hydrogen regeneration in step (c); and(e) passing at least a portion of said hydrocarbonaceous feedstock to said second catalytic hydrocracking zone operating at hydrocracking conditions and containing regenerated hydrocracking catalyst while continuing the flow of hydrogen and recovering a hydrocracking zone effluent therefrom.