Composition for opening polycyclic rings in hydrocracking

A catalyst composition comprising:

• a support comprising a mixture of non-zeolitic alumina and amorphous silica-alumina having more than 20 wt % silica in the amorphous silica-alumina and having an overall ratio of moles of silicon to moles of aluminum in the range of about 0.05 to about 0.20;
• a first hydrogenation metal comprising platinum;
• and
• a second hydrogenation metal from Group VIIB or Group VIII of the Periodic Table other than platinum;
• wherein the first hydrogenation metal and the second hydrogenation metal are deposited on the support.

A catalyst composition comprising:

• a support comprising a mixture of amorphous silica-alumina and non-zeolitic alumina comprising no more than 75 wt % amorphous silica-alumina and having a ratio of moles of silicon to moles of aluminum in the range of about 0.05 to about 0.50;
• a first hydrogenation metal comprising platinum;
• a second hydrogenation metal from Group VIIB or Group VIII of the Periodic Table other than platinum;
• an optional third metal from Group IA of the Periodic Table;
• wherein the first hydrogenation metal, the second hydrogenation metal and the optional third metal are deposited on the support;
• and
• the ratio of moles of silicon to the moles of the first hydrogenation metal, the second hydrogenation metal and the optional third metal on the support is between about 15 and about 55.