A hydroprocessing catalyst or catalyst precursor has been developed. The catalyst is a transition metal molybdotungstate material or metal sulfides derived therefrom. The hydroprocessing using the transition metal molybdotungstate material may include hydrodenitrification, hydrodesulfurization, hydrodemetallation, hydrodesilication, hydrodearomatization, hydroisomerization, hydrotreating, hydrofining, and hydrocracking.

A method is provided for forming composite of nano-sized zeolite beta and hierarchical zeolite Y. The method includes synthesizing a hierarchical zeolite Y, synthesizing a gel of a nano-sized zeolite beta, forming a slurry of the nano-sized zeolite beta from the gel, and mixing the hierarchical zeolite Y with the slurry to form a composite. The composite is dried and an extrudable paste is formed from the dried composite. The extrudable paste is extruded to form extrudates, which are calcined to form calcined extrudates.

A method is provided for forming composite of nano-sized zeolite beta and hierarchical zeolite Y. The method includes synthesizing a hierarchical zeolite Y, synthesizing a gel of a nano-sized zeolite beta, forming a slurry of the nano-sized zeolite beta from the gel, and mixing the hierarchical zeolite Y with the slurry to form a composite. The composite is dried and an extrudable paste is formed from the dried composite. The extrudable paste is extruded to form extrudates, which are calcined to form calcined extrudates.

A method of oxidative dehydrogenating of butane stream comprises contacting the same with a bimetallic catalyst in the presence of oxygen, wherein the bimetallic catalyst containing nickel and bismuth or oxides thereof supported on solid support such as zirconium oxide, low aluminum MFI zeolite, and mesoporous silica foam. Various embodiments of the method of oxidative dehydrogenating the butane-containing hydrocarbon stream and the bimetallic catalyst are also provided.

A composition and method of making such a composition that has application in the hydroprocessing of hydrocarbon feedstocks. The method comprises selecting an organic additive by the use of a correlation model for predicting catalytic activity as a function of a physical property that is associated with the organic additive and incorporating the organic additive into a support material to provide the additive impregnated composition.

The current invention relates a process for making and using a bulk catalyst precursor (i.e. no support material is added as such) comprising Ni and Mo and/or W and an organic component, wherein the molar ratio of C:(Mo+W) ranges from 1.5 to 10. The bulk catalyst precursor is prepared from a mixture of metal-precursors with an organic agent. The organic agent is partly decomposed to form a mixed metal-oxide/C phase which is in effect the bulk catalyst precursor. This bulk catalyst precursor (i) is effectively insoluble in water (ii) does not have any appreciable pore volume or surface area and (iii) does not contain a (nano)crystalline metal-oxide phase as characterized by XRD.

The current invention relates a process for making and using a bulk catalyst precursor (i.e. no support material is added as such) comprising Ni and Mo and/or W and an organic component, wherein the molar ratio of C:(Mo+W) ranges from 1.5 to 10. The bulk catalyst precursor is prepared from a mixture of metal-precursors with an organic agent. The organic agent is partly decomposed to form a mixed metal-oxide/C phase which is in effect the bulk catalyst precursor. This bulk catalyst precursor (i) is effectively insoluble in water (ii) does not have any appreciable pore volume or surface area and (iii) does not contain a (nano)crystalline metal-oxide phase as characterized by XRD.

The invention relates to a catalyst comprising an alumina-, silica- or silica-alumina-based support, at least one group VIII element, at least one group VIB element, and a furan compound. The invention also relates to the method for producing said catalyst and to the use thereof in a hydrotreating and/or hydrocracking method.

The invention relates to a catalytic cracking gasoline prehydrogenation method. Thiol etherification and double bond isomerization reactions are carried out on catalytic cracking gasoline through a prehydrogenation reactor. The reaction conditions are as follows: the reaction temperature is between 80° C. and 160° C., the reaction pressure is between 1 MPa and 5 MPa, the liquid-volume hourly space velocity is from 1 to 10 h.sup.−1, and the hydrogen-oil volume ratio is (3-8):1; a prehydrogenation catalyst comprises a carrier and active ingredients, the carrier contains an aluminium oxide composite carrier with a macroporous structure and one or more of ZSM-5, ZSM-11, ZSM-12, ZSM-35, mordenite, amorphous form aluminum silicon, SAPO-11, MCM-22, a Y molecular sieve and a beta molecular sieve, the surface of the carrier is loaded with one or more of the active ingredients cobalt, molybdenum, nickel and tungsten; based on oxides, the content of the active ingredients is between 0.1% and 15.5%.

The invention relates to a catalytic cracking gasoline upgrading method. First, in the presence of a prehydrogenation catalyst, the full-range FCC gasoline undergoes prehydrogenation in a prehydrogenation reactor to remove diolefins, mercaptans and sulfides, and then the prehydrogenation product undergoes selective hydrodesulfurization in the presence of a hydrodesulfurization-isomerization catalyst, and straight-chain olefins are isomerized into single-branched olefins or single-branched alkanes, thus obtaining a low-olefin, ultralow-sulfur and high-octane clean gasoline product.