Abstract: This invention pertains to a hydrocracking process for mid-distillate products and to hydrocracking catalysts having improved selectivity, activity and stability for use in the production of mid-distillate products from heavy gas oil feedstocks boiling above 700.degree. F.

Abstract: Dewaxing processes for hydrocarbon feedstocks are disclosed using novel catalysts comprising specific silicoaluminophosphates of U.S. Pat. No. 4,440,871. The products of the instant dewaxing processes are characterized by lower pour points than the hydrocarbon feedstock.

Abstract: Hydrocracking processes are disclosed using novel catalysts comprising medium and large pore non-zeolitic molecular sieves selected from novel compositions such as the silicoaluminophosphates of U.S. Pat. No. 4,440,871, preferably in combination with traditional hydrocracking catalysts such as zeolitic aluminosilicates. The products of the instant processes are characterized by higher isoparaffin to n-paraffin ratios.

Abstract: Hydrocracking processes are disclosed using catalysts comprising silicoaluminophosphates of U.S. Pat. No. 4,440,871 characterized in the calcined form by an adsorption oxygen of at least 4 isobutane of at least 2 percent by weight at a partial pressure of 500 torr and a temperature of 20.degree. C.

Abstract: Dewaxing processes for hydrocarbon feedstocks are disclosed using novel catalysts comprising non-zeolitic molecular sieves, such as the silicoaluminophosphates of U.S. Pat. No. 4,440,871. The products of the instant dewaxing processes are characterized by lower pour points than the hydrocarbon feedstock.

Abstract: A process for hydrocracking a crude oil feed, a hydrocracking catalyst employed therein, and a process for the preparation of this catalyst are disclosed. The hydrocracking catalyst comprises a zeolitic aluminosilicate which has an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of at least 6 and which has been treated by (i) thermal treatment at an effective temperature and for an effective time in the presence of steam, followed by (ii) ion-exchange with a solution containing ammonium ion; and (2) an effective amount of a hydrogenation component. In a preferred embodiment, the starting crystalline zeolitic aluminosilicate is a Y-type zeolite having an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of at least about 9 and a unit cell dimension (a.sub.o) of less than about 24.55 .ANG., and the steam treatment is carried out for a period sufficient to cause a decrease of not more than about 0.1 .ANG. in the unit cell dimension, thereby producing a Y-type zeolite product having a SiO.sub.2 /Al.sub.2 O.sub.

Abstract: Dewaxing processes for hydrocarbon feedstocks are disclosed using novel catalysts comprising non-zeolitic molecular sieves, such as the silicoaluminophosphates of U.S. Pat. No. 4,440,871. The products of the instant dewaxing processes are characterized by lower pour points than the hydrocarbon feedstock.

Abstract: The invention involves composite structures of multiple phases, at least two of which are inorganic crystalline compositions that are contiguous and have a common crystal framework and structure, and at least one of them contains phosphorus and aluminum atoms as part of its crystalline framework structure; and to processes for making the same. It is desired that each phase has a microporous molecular sieve structure. The process involves the growth of a crystalline structure constituting such a phase in the presence of crystals of another of such a phase. Preferably, the process involves a hydrothermal crystallization treatment of the precursors to such phase.

Abstract: Hydrocracking processes are disclosed using catalysts comprising silicoaluminophosphates of U.S. Pat. No. 4,440,871 characterized in the calcined form by an adsorption of oxygen of at least 4 percent by weight at a partial pressure of 100 torr and a temperature of -186.degree. C.

Abstract: Hydrocracking processes are disclosed using novel catalysts comprising non-zeolitic molecular sieves such as the silicoaluminophosphates of U.S. Pat. No. 4,440,871. The products of the instant processes are characterized by higher i-paraffin to n-paraffin ratios.