A silica-alumina powder, a method for producing the same, and a fluid catalytic cracking catalyst including this silica-alumina powder are provided. The silica-alumina powder contains SiO.sub.2 within a predetermined range, has a specific surface area within a predetermined range, and has a pore volume and an acid amount within predetermined ranges. An alumina raw material includes one of boehmite, pseudo-boehmite, and mainly amorphous alumina gel. The method for producing the silica-alumina powder includes a step of mixing an aqueous solution including alumina hydrate and an aqueous solution containing a silica precursor to prepare an aqueous solution including a silica-alumina precursor; a step of adjusting the pH of the aqueous solution to be within a predetermined range, and then heat-treating the aqueous solution; and a step of cooling the aqueous solution or silica-alumina slurry, then separating and washing a solid, and then drying or further calcining the solid.

A process for regenerating a deactivated catalyst, the process comprising contacting a deactivated aluminosilicate zeolite catalyst comprising a nitrogen-containing contaminant with an oxidant to provide a regenerated catalyst comprising less than 0.5% contaminant and a regeneration by-product stream comprising nitrogen.

The present disclosure provides a honeycomb catalyst for catalytic oxidative degradation of VOCs prepared by an ultrasonic double-atomization process. The honeycomb catalyst is prepared by performing acidification and performing hydrothermal activation in alcoholic solution for honeycomb to modify a surface; dissolving soluble transition metal inorganic salt in deionized water to obtain precursor solution; performing ultrasonic atomization of the precursor solution and the precipitant solution in the ultrasonic atomization device into droplets; placing the modified honeycomb in a special quartz glass reactor, wherein the droplets enter into the quartz glass reactor through a pipeline to come into contact with a surface of a honeycomb hole and rapidly react to generate a hydroxide precursor on the surface of the honeycomb hole; drying the honeycomb into a drying box after performing the ultrasonic atomization, and calcining the honeycomb into a muffle furnace to obtain the honeycomb catalyst loaded with transition metal oxides.

A catalyst containing molybdenum, bismuth, and iron, in which R1 represented by the following equation (1) is 0.45 or more and 5.00 or less is provided, and use of the catalyst achieves a high yield, in the case of the use in a gas phase oxidation reaction, particularly in the case of the use in producing an unsaturated aldehyde compound or an unsaturated carboxylic acid compound by a partial oxidation reaction,

[00001]$\begin{array}{cc}R1=\left(\mathrm{maximum}\mathrm{value}\mathrm{of}\mathrm{peak}\mathrm{at}886{\mathrm{cm}}^{-1}?5{\mathrm{cm}}^{-1}\right)?\left(\mathrm{maximum}\mathrm{value}\mathrm{of}\mathrm{peak}\mathrm{at}354{\mathrm{cm}}^{-1}?5{\mathrm{cm}}^{-1}\right)\mathrm{as}\mathrm{measured}\mathrm{by}\mathrm{Raman}\mathrm{spectroscopy}.& \left(1\right)\end{array}$

The precursor of a hydroprocessing catalyst is made by impregnating a metal oxide component comprising at least one metal from Group 6 of the Periodic Table and at least one metal from Groups 8-10 of the Periodic Table with an amide formed from a first organic compound containing at least one amine group, and a second organic compound containing at least one carboxylic acid group. Following impregnation heat treatment follows to form in situ generated unsaturation additional to that in the two organic compounds. The catalyst precursor is sulfided to form an active, sulfide hydroprocessing catalyst.

Disclosed is a hybrid catalyst system for the production of hydrogen/carbon monoxide syngas. The hybrid catalyst system includes a dye, a rhenium (Re) catalyst, and a cobalt (Co) catalyst grafted on a semiconductor metal oxide. The hybrid catalyst system can produce syngas without the aid of external energy and enables control over the ratio of hydrogen/carbon monoxide formed. Therefore, the hybrid catalyst system can find application in various industrial fields, including chemical fuel production.

The invention provides a composite catalyst containing a first component and a second component. The first component contains a ternary mixed metal oxide. The second component contains a platinum group metal. The composite catalyst is useful for catalyzing the low temperature oxidation of carbon monoxide and hydrocarbons.

The precursor of a hydroprocessing catalyst is made by impregnating a metal oxide component comprising at least one metal from Group 6 of the Periodic Table and at least one metal from Groups 8-10 of the Periodic Table with an amide formed from a first organic compound containing at least one amine group, and a second organic compound containing at least one carboxylic acid group. Following impregnation heat treatment follows to form in situ generated unsaturation additional to that in the two organic compounds. The catalyst precursor is sulfided to form an active, sulfide hydroprocessing catalyst.

Disclosed is a hybrid catalyst system for the production of hydrogen/carbon monoxide syngas. The hybrid catalyst system includes a dye, a rhenium (Re) catalyst, and a cobalt (Co) catalyst grafted on a semiconductor metal oxide. The hybrid catalyst system can produce syngas without the aid of external energy and enables control over the ratio of hydrogen/carbon monoxide formed. Therefore, the hybrid catalyst system can find application in various industrial fields, including chemical fuel production.

The present invention relates to a metal modified Y zeolite, its preparation and use. Said zeolite contains 1-15 wt % of IVB group metal as oxide and is characterized in that the ratio of the zeolite surface's IVB group metal content to the zeolite interior's IVB group metal content is not higher than 0.2; and/or the ratio of the distorted tetrahedral-coordinated framework aluminum to the tetrahedral-coordinated framework aluminum in the zeolite lattice structure is (0.1-0.8):1.