Hydrocracking catalyst for middle distillates

Claim 2

A catalyst composition comprising nickel, molybdenum, and phosphorus impregnated on a support consisting of silica/titania on alumina wherein the molar ratio of silica to titania ranges from about 10:1 to about 0.05:1, said nickel is present in the composition in an amount ranging from about 0.1 to about 5 weight percent based on the weight of said catalyst composition, and said molybdenum is present in the composition in an amount ranging from about 1 to about 15 weight percent based on the weight of said catalyst composition.

Claim 3

A catalyst composition according to claim 1 wherein said phosphorus is present in the composition in an amount of about 1 weight percent based on the weight of said catalyst composition.

Claim 4

A catalyst composition according to claim 1 wherein said catalyst composition is sulfided.

Claim 5

A catalyst composition consisting essentially of the catalyst composition of claim 1.

Claim 6

A process for producing a catalyst composition comprising: impregnating onto a dried alumina a solution containing silicon and titanium to form a silicon/titanium-impregnated alumina material, hydrolyzing said silicon/titanium-impregnated alumina material to form a hydrolyzed silica/titania on alumina composition, drying and thereafter calcining said hydrolyzed silica/titania on alumina composition to form a calcined composition, impregnating said calcined composition with a solution of nickel, molybdenum and phosphorus to form a nickel/molybdenum/phosphorus on silica/titania on alumina composition, and calcining said nickel/molybdenum/phosphorus on silica/titania on alumina composition to form said catalyst composition.

Claim 7

A process for producing a catalyst composition comprising: impregnating onto a dried alumina a solution containing silicon and titanium to form a silicon/titanium-impregnated alumina material, hydrolyzing said silicon/titanium-impregnated alumina material to form a hydrolyzed silica/titania on alumina composition, drying and thereafter calcining said hydrolyzed silica/titania on alumina composition to form a calcined composition, impregnating said calcined composition with a solution of nickel, molybdenum and phosphorus to form a nickel/molybdenum/phosphorus on silica/titania on alumina composition, and calcining said nickel/molybdenum/phosphorus on silica/titania on alumina composition to form said catalyst composition.

Claim 8

A process in accordance with claim 5 wherein said solution containing silicon and titanium is a solution containing a silicon alkoxide and a titanium alkoxide, and said solution of nickel, molybdenum and phosphorus is an aqueous solution of NiCO 3 , MoO 3 and H 3 PO 4 .

Claim 9

A process in accordance with claim 6, wherein said silicon alkoxide is Si(C 2 H 5 O) 4 and said titanium alkoxide is Ti(C 4 H 9 O) 4 .

Claim 10

A process for producing a presulfided catalyst composition comprising: (a) mixing a silicon alkoxide, a titanium alkoxide and about 0 to about 90 volume percent, based on the total mixture, of organic diluent to form a silicon and titanium solution; (b) impregnating a dried alumina with said silicon and titanium solution to form a silicon/titanium-impregnated alumina material; (c) hydrolyzing said silicon/titanium-impregnating alumina material to form a hydrolyzed silica/titania on silica composition; (d) drying said hydrolyzed silica/titania on alumina composition to form a dried composition; (e) calcining said dried composition to form a calcined composition; (f) impregnating said calcined composition with an impregnating solution of nickel, molybdenum and phophorus in a diluent to form a nickel/molybdenum/phosphorus on silica/titania on alumina composition; (g) calcining said nickel/molybdenum/phosphorus on silica/titania on alumina composition to form a calcined composition; and (h) presulfiding said calcined composition to form said presulfided catalyst composition.

Claim 11

A process for producing a presulfided catalyst composition comprising: (a) mixing a silicon alkoxide, a titanium alkoxide and about 0 to about 90 volume percent, based on the total mixture, of organic diluent to form a silicon and titanium solution; (b) impregnating a dried alumina with said silicon and titanium solution to form a silicon/titanium-impregnated alumina material; (c) hydrolyzing said silicon/titanium-impregnating alumina material to form a hydrolyzed silica/titania on silica composition; (d) drying said hydrolyzed silica/titania on alumina composition to form a dried composition; (e) calcining said dried composition to form a calcined composition; (f) impregnating said calcined composition with an impregnating solution of nickel, molybdenum and phophorus in a diluent to form a nickel/molybdenum/phosphorus on silica/titania on alumina composition; (g) calcining said nickel/molybdenum/phosphorus on silica/titania on alumina composition to form a calcined composition; and (h) presulfiding said calcined composition to form said presulfided catalyst composition.

Claim 12

A process according to claim 8 wherein said silicon alkoxide is Si(C 2 H 5 O) 4 , said titanium alkoxide is Ti(C 2 H 9 O) 4 , said nickel in said impregnating solution is provided by NiCO 3 , said molybdenum in said impregnating solution is provided by MoO 3 , said phosphorus in said impregnating solution is provided by H 3 PO 4 , and said diluent of said impregnating solution is water.