Hydrocracking process and catalyst therefor
AssigneeUnion Oil Company of California
InventorsJohn W. Ward, Timothy L. Carlson
Life of this patent
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Abstract
A hydrocracking process, of especial use in the production of a relatively high yield of middle distillate products along with a smaller but still significant yield of gasoline from high boiling gas oils and the like, comprises contacting a gas oil or other hydrocarbon feedstock under hydrocracking conditions with a novel catalyst comprising one or more hydrogenation components on a support material comprising, in combination, a dispersion of silica-alumina in alumina and a zeolite of the Y crystalline structure but having a silica-to-alumina ratio above about 6.0.
Claims23
In a catalytic hydrocracking process, the improvement comprising contacting a hydrocarbon feedstock with a hydrocracking catalyst under hydrocracking conditions producing a product hydrocarbon of lower average molecular weight than said feedstock with a catalyst comprising an active hydrogenation metal component on a support comprising in admixture a dispersion of silica-alumina in alumina and a crystalline aluminosilicate zeolite having the zeolite Y crystal structure and a silica-to-alumina mole ratio above about 6.0.
In a catalytic hydrocracking process, the improvement comprising contacting a hydrocarbon feedstock with a hydrocracking catalyst under hydrocracking conditions producing a product hydrocarbon of lower average molecular weight than said feedstock with a catalyst comprising a Group VIB or Group VIII active metal component on a support comprising in admixture a dispersion of silica-alumina in alumina and a crystalline aluminosilicate zeolite having catalytic cracking activity, a silica-to-alumina mole ratio above about 6.0, and an X-ray diffraction pattern consistent with a Y zeolite of unit cell size of 24.75 angstroms or less.
In a catalytic hydrocracking process, the improvement comprising contacting a hydrocarbon feedstock with a hydrocracking catalyst under hydrocracking conditions producing a substantial number of product hydrocarbon components boiling in the C.sub.4 to 700.degree. F. range, with more than 50 volume percent of said product hydrocarbon components being a middle distillate product boiling in the range of about 300.degree. tc 700.degree. F. and at least about 15 volume percent of said components being a gasoline product boiling in the range of about 185.degree. and 300.degree. F., said hydrocracking catalyst comprising a nickel.or cobalt active metal component and a molybdenum or tungsten active metal component on a support comprising in intimate admixture (1) a dispersion of silica-alumina in alumina and (2) a zeolite comprising at least 25 percent by weight of said support and having an X-ray powder diffraction pattern consistent with a Y zeolite of unit cell size below about 24.55 angstroms and a SiO.sub.2 to Al.sub.2 O.sub.3 ratio above 6.
In a catalytic hydrocracking process, the improvement comprising contacting a hydrocarbon feedstock with a hydrocracking catalyst under hydrocracking conditions, including the presence of hydrogen, producing a product hydrocarbon of lower average molecular weight than said feedstock with a catalyst comprising a Group VIB or Group VIII metal component in intimate admixture with a dispersion of silica-alumina in alumina and a zeolite, said zeolite being prepared by a method comprising:
- (1) contacting a Y zeolite with a fluorosilicate compound, said Y zeolite having been at least partially cation-exchanged to contain ammonium cations and said contacting yielding a resultant zeolite having a silica-to-alumina mole ratio above 6.0;
- and
- (2) calcining the resultant zeolite at an elevated temperature in the presence of water vapor at a partial pressure of at least 0.2 p.s.i.a.
Dependencies are inferred from the claim text.