The present disclosure relates to a method for preparing acrylonitrile dimer.

The present disclosure relates to a method for preparing acrylonitrile dimer.

A method for making a metal carbide based catalyst for crude oil cracking includes mixing a clay with a phosphorous based stabilizer material to obtain a liquid slurry; adding an aluminosilicate zeolite and an ultrastable Y zeolite to the liquid slurry; adding Al.sub.2Cl(OH).sub.5 to the liquid slurry; adding metal carbide particles, having a given diameter, to the liquid slurry to obtain a mixture; and spray drying the mixture to obtain the metal carbide based catalyst. The metal carbide particles are coated with the aluminosilicate zeolite and the ultrastable Y zeolite.

A process for decomposition of sulfuric acid, particularly a process for catalytically decomposing sulfuric acid is used to obtain sulfur dioxide therefrom. Catalysts are used for improving the dissociation efficiency by lowering the activation energy barrier for the reaction.

The present disclosure relates to a process for decomposition of sulfuric acid, particularly a process for catalytically decomposing sulfuric acid, to obtain sulfur dioxide therefrom. In the present process, catalysts play a major role for improving the dissociation efficiency by lowering the activation energy barrier for the reaction.

The present disclosure relates to a catalyst composition for conversion of sulphur trioxide to sulphur dioxide and oxygen comprising an active material selected from the group consisting of transitional metal oxide, mixed transitional metal oxide, and combinations thereof; and a support material selected from the group consisting of silica, titania, zirconia, carbides, and combinations thereof. The subject matter also relates to a process for the preparation of the catalyst composition for conversion of sulphur trioxide to sulphur dioxide and oxygen.

A (methyl)acrolein oxidation catalyst and a preparation method therefor-in which the catalyst has a composition represented by the following formula: x(Mo12PaCsbVcDeOf)+tC/yZ in which Mo.sub.12P.sub.aCs.sub.bV.sub.cD.sub.eO.sub.f is a heteropolyacid salt main catalyst; C is a nano carbon fiber additive, and Z is a carrier thermal conduction diluent; Mo, P, Cs, V, and O represent the elements of molybdenum, phosphorus, cesium, vanadium, and oxygen, respectively; D represents at least one element selected from the group consisting of copper, iron, magnesium, manganese, antimony, zinc, tungsten, silicon, nickel, and palladium; a, b, c, e, and f represent the atomic ratio of each element, a=0.1-3, b=0.01-3, c=0.01-5, e=0.01-2, and f being the atomic ratio of oxygen required to satisfy the valence of each of the described components; x and y represent the weights of the main catalyst and the carrier thermal conduction diluent Z, and y/x=11.1-50%; and t represents the weight of the nano carbon fiber, and t/x=3-10%.

A (methyl)acrolein oxidation catalyst and a preparation method therefor-in which the catalyst has a composition represented by the following formula: x(Mo12PaCsbVcDeOf)+tC/yZ in which Mo.sub.12P.sub.aC.sub.SbV.sub.cD.sub.eO.sub.f is a heteropolyacid salt main catalyst; C is a nano carbon fiber additive, and Z is a carrier thermal conduction diluent; Mo, P, Cs, V, and O represent the elements of molybdenum, phosphorus, cesium, vanadium, and oxygen, respectively; D represents at least one element selected from the group consisting of copper, iron, magnesium, manganese, antimony, zinc, tungsten, silicon, nickel, and palladium; a, b, c, e, and f represent the atomic ratio of each element, a=0.1-3, b=0.01-3, c=0.01-5, e=0.01-2, and f being the atomic ratio of oxygen required to satisfy the valence of each of the described components; x and y represent the weights of the main catalyst and the carrier thermal conduction diluent Z, and y/x=11.1-50%; and t represents the weight of the nano carbon fiber, and t/x=3-10%.

The nitrogen and phosphorus co-doped crystalline carbon materials are prepared by a template-free method that includes pyrolizing a precursor mixture including a carbon source, a nitrogen source, and a phosphorus source. The method involves mixing known amounts of the precursor components, dissolving the precursor mixture in deionized water, distilling solvent from the aqueous mixture, and vacuum drying the residue to a dry solid mixture. The mixture is then carbonized by pyrolysis at 900 C. in an argon atmosphere to obtain a nitrogen and phosphorus co-doped crystalline carbon material. The principles of the method are illustrated by a precursor mixture of sucrose, urea, and ammonium dihydrogen phosphate (NH.sub.4H.sub.2PO.sub.4). The amount of ammonium salt in the precursor mixture plays a key role in controlling the crystallinity, morphology, and composition of the N/P co-doped crystalline carbon material.

A method for making a metal carbide based catalyst for crude oil cracking includes mixing a clay with a phosphorous based stabilizer material to obtain a liquid slurry; adding an aluminosilicate zeolite and an ultrastable Y zeolite to the liquid slurry; adding Al.sub.2Cl(OH).sub.5 to the liquid slurry; adding metal carbide particles, having a given diameter, to the liquid slurry to obtain a mixture; and spray drying the mixture to obtain the metal carbide based catalyst. The metal carbide particles are coated with the aluminosilicate zeolite and the ultrastable Y zeolite.