Patent ID: 7648939
Filing Date: 2010-01-19
Classification: B01J,C10G

Abstract:
1. An unsupported hydrocracking catalyst composition having improved mono-aromatics hydrogenation activity and selectivity for middle distillates, which comprises: a Group VIb metal and a non-noble Group VIII metal, wherein the total amount of said Group VIb metal and said non-noble Group VIII metal present in said unsupported catalyst composition is in the range of from 15 to 99 wt % on an oxide basis and based on the total unsupported catalyst composition, and wherein the molar ratio of said non-noble Group VIII metal to Group VIb metal is in the range of from 0.5:1 to 3:1, and a zeolite that is present in said unsupported catalyst composition ranging from 20 to 85 wt % based on the total unsupported catalyst composition, wherein said unsupported catalyst composition is prepared by the co-precipitation of said Group VIb metal, said non-noble Group VIII metal, and said zeolite at one and the same time, and wherein from 4 to 25 wt % of said Group VIb metal is incorporated into said pores of said co-precipitated zeolite, said unsupported hydrocracking catalyst composition having improved mono-aromatics hydrogenation activity and selectivity for middle distillates compared to hydrocracking catalyst compositions containing similar amounts of Group VIb metal, non-noble Group VIII metal, and zeolite, but not prepared by co-precipitation of all three of these components at one and the same time.