Abstract: Novel catalyst compositions are provided comprising a silica/alumina carrier having a silica content less than about 40% by weight and at least one noble metal component of Group VIII of the Periodic Table and wherein the catalyst contains (1) pores having a diameter of smaller than 600 .ANG. occupying at least 90% of the total pore volume and (2) pores having a diameter of 150 to 600 .ANG. occupying at least about 40% of the total volume of the pores having a diameter of smaller than 600 .ANG.. This catalyst is particularly useful in the production of jet fuels and white oils.

Abstract: Novel catalyst compositions are provided comprising a silica/alumina carrier having a silica content less than about 40% by weight and at least one noble metal component of Group VIII of the Periodic Table and wherein the catalyst contains (1) pores having a diameter of smaller than 600 A occupying at least 90% of the total pore volume and (2) pores having a diameter of 150 to 600 A occupying at least about 40% of the total volume of the pores having a diameter of smaller than 600 A. This catalyst is particularly useful in the production of jet fuels and white oils.

Abstract: A process for producing lubricating oils of enhanced photostability by hydrogenating a lubricating oil fraction of a hydrocrackate in the presence of a palladium catalyst supported on a silica-containing refractory inorganic oxide carrier in which the silica content is less than 40 weight %.

Abstract: Supported platinum group metal-tin hydrocarbon conversion catalysts are prepared by (1) impregnating a refractory inorganic oxide support with an aqueous solution of a halogen acid containing a platinum group metal component; (2) drying the platinum group metal impregnated carrier; (3) impregnating the dried platinum group metal impregnate with a solution of a divalent tin compound in a non-oxidizing and non-reducing atmosphere; and (4) drying the resulting impregnate.