A unique crystalline bis-ammonia metal molybdate material has been developed. The material may be used as a hydroprocessing catalyst. The hydroprocessing may include hydrodenitrification, hydrodesulfurization, hydrodemetallation, hydrodearomatization, hydrodesilication, hydroisomerization, hydrotreating, hydrofining, and hydrocracking.

A description is given of a process for hydrotreatment of at least one hydrocarbon feedstock having a weighted average temperature (WAT) of more than 380 C. using at least one catalyst containing at least one metal from Group VIB and/or at least one metal from Group VIII of the periodic table and a support containing an amorphous mesoporous alumina having a connectivity (Z) of more than 2.7, said hydrotreatment process operating at a temperature of between 250 C. and 430 C., at a total pressure of between 4 MPa and 20 MPa with a ratio of volume of hydrogen to volume of hydrocarbon feedstock of between 200 and 2 000 liters per liter and at an Hourly Volume Velocity (HVV) defined by the ratio of the volume flow of liquid hydrocarbon feedstock to the volume of catalyst fed into the reactor of between 0.5 and 5 h.sup.1.

A description is given of a process for hydrotreatment of at least one hydrocarbon feedstock having a weighted average temperature (WAT) of more than 380 C. using at least one catalyst containing at least one metal from Group VIB and/or at least one metal from Group VIII of the periodic table and a support containing an amorphous mesoporous alumina having a connectivity (Z) of more than 2.7, said hydrotreatment process operating at a temperature of between 250 C. and 430 C., at a total pressure of between 4 MPa and 20 MPa with a ratio of volume of hydrogen to volume of hydrocarbon feedstock of between 200 and 2 000 liters per liter and at an Hourly Volume Velocity (HVV) defined by the ratio of the volume flow of liquid hydrocarbon feedstock to the volume of catalyst fed into the reactor of between 0.5 and 5 h.sup.1.

The present invention relates to a supported catalyst having a structure in which a metal catalyst is supported on a core-shell structured support. The support includes core particles and shell particles having a smaller particle diameter than the core particles and coated on the core particles to form a shell layer. Due to this structure, the supported catalyst can be used to produce carbon nanostructures that form a novel secondary structure in which ends of the carbon nanostructures are supported on the supported catalyst and form independent branches and the opposite ends grow and are assembled together. The novel structure is expected to find application in various fields, such as energy materials, functional composites, pharmaceuticals, batteries, and semiconductors, because of its characteristic shape.

The present invention relates to a supported catalyst having a structure in which a metal catalyst is supported on a core-shell structured support. The support includes core particles and shell particles having a smaller particle diameter than the core particles and coated on the core particles to form a shell layer. Due to this structure, the supported catalyst can be used to produce carbon nanostructures that form a novel secondary structure in which ends of the carbon nanostructures are supported on the supported catalyst and form independent branches and the opposite ends grow and are assembled together. The novel structure is expected to find application in various fields, such as energy materials, functional composites, pharmaceuticals, batteries, and semiconductors, because of its characteristic shape.

The present invention relates to a method for the treatment of an exhaust gas comprising carbon monoxide (CO) and/or one or more volatile organic compounds (VOCs) using a PGM-free catalyst article comprising a mixed oxide of Mn, Cu, Mg, Al and La. The present invention also relates to an HVAC system comprising a PGM-free catalyst article.

Provided are the following: a mixture of visible light-responsive photocatalytic titanium oxide fine particles which can conveniently produce a photocatalyst thin film that exhibits photocatalyst activity even with only visible light (400-800 nm) and that exhibits high transparency; a dispersion liquid of the fine particles; a method for producing the dispersion liquid; a photocatalyst thin film; and a member having the photocatalyst thin film on a surface thereof. The mixture of visible light-responsive photocatalytic titanium oxide fine particles is characterized by containing two kinds of titanium dioxide fine particles: first titanium oxide fine particles, in which a tin component and a transition metal component (excluding an iron group element component) that increases visible light response properties form a solid solution, and second titanium oxide fine particles, in which an iron group element component and a chromium group element component form a solid solution.

The present invention relates to a catalyst for oxidative dehydrogenation and a method of preparing the same. More particularly, the present invention provides a catalyst for oxidative dehydrogenation allowing oxidative dehydrogenation reactivity to be secured while increasing a first pass yield, and a method of preparing the catalyst.

The present invention relates to a hydrotreating catalyst comprising at least one group VIB metal, at least one group VIII metal and an alumina support having a gamma alumina content greater than 50% by weight and less than 100% by weight with respect to the weight of the support, said support having a specific surface area comprised between 25 and 150 m.sup.2/g.

A hydroprocessing catalyst has been developed. The catalyst is a unique crystalline transition metal oxy-hydroxide molybdate material. The hydroprocessing using the crystalline ammonia transition metal oxy-hydroxide molybdate material may include hydrodenitrification, hydrodesulfurization, hydrodemetallation, hydrodesilication, hydrodearomatization, hydroisomerization, hydrotreating, hydrofining, and hydrocracking.