The present disclosure relates to the preparation of pyridine derivatives, such as α-picoline or α-parvoline, and catalysts useful for the selective preparation of such pyridine derivatives. Particularly, the present disclosure relates to the selective preparation of certain pyridine derivative using dealuminated zeolite catalysts.

The invention relates to a V-Ni.sub.2P/g-C.sub.3N.sub.4 photocatalyst, a preparation method, and application thereof. The V-Ni.sub.2P/g-C.sub.3N.sub.4 photocatalyst is a composite material of V-Ni.sub.2P and g-C.sub.3N.sub.4, wherein V-Ni.sub.2P has the spherical structure formed by nanosheets; the mass ratio of the V-Ni.sub.2P and g-C.sub.3N.sub.4 is (0.01 to 0.2):1.

The invention relates to tetraalkylammonium-tetra- or hexahydroxometallates such as tetraethylammonium hexahydroxoplatinate, (N(alkyl)4)y[M(OH)x], a method for the production thereof, and the use thereof for producing catalysts.

Metal oxides-silica composite materials are synthesized by a co-precipitation method to serve as modified catalysts for converting ethanol into four-carbon hydrocarbons. The method includes mixing a liquid-phase silicon source and a metal precursor at different ratios so as to change the acid-base composition of the composite materials and thereby increase selectivity with respect to the four-carbon products.

Metal oxide catalysts comprising various dopants are provided. The catalysts are useful as heterogenous catalysts in a variety of catalytic reactions, for example, the oxidative coupling of methane to C2 hydrocarbons such as ethane and ethylene. Related methods for use and manufacture of the same are also disclosed.

A process for the production of methanol (CH.sub.3OH) from carbon dioxide (CO.sub.2) and hydrogen (H.sub.2), wherein CO.sub.2 is reacted with H.sub.2 over a manganese-promoted molybdenum(IV) sulfide catalyst; as well as a catalyst for such a process and a production process for the catalyst.

The present invention relates to a catalyst for producing light olefins from C4-C7 hydrocarbons from catalytic cracking reaction and the production process of light olefins from said catalyst, wherein said catalyst has core-shell structure comprising a zeolite core with mole ratio of silicon to aluminium (Si/Al) between 2 to 250 and layered double hydroxide shell (LDH). The catalyst according to the invention provides high percent conversion of substrate to products and high selectivity to light olefins product.

A three-way catalyst for reduced palladium loading is provided. The catalyst includes an inert substrate and a palladium catalyst material coating the substrate. The palladium catalyst material includes a support material formed from one of 10% CeO.sub.2/Al.sub.2O.sub.3, 20% CeO.sub.2—Al.sub.2O.sub.3 (20CeAlOy), 30% CeO.sub.2—Al.sub.2O.sub.3 (30CeAlOy), Al.sub.2O.sub.3, and MOx-Al.sub.2O.sub.3, wherein M is one of copper, iron, manganese, titanium, zirconium, magnesium, strontium, and barium. The palladium catalyst material includes a layer of CeO.sub.2 material disposed upon the support material, wherein the layer of CeO.sub.2 material is dispersed on a surface of the support material. The palladium catalyst material includes an active component including a layer of praseodymium oxide particles dispersed across the surface of the layer of CeO.sub.2 material and a layer of palladium particles disposed upon and dispersed across the surface of the layer of CeO.sub.2 material at locations each corresponding to a respective location of each of the praseodymium particles.

A three-way catalyst for reduced palladium loading is provided. The catalyst includes an inert substrate and a palladium catalyst material coating the substrate. The palladium catalyst material includes a support material formed from one of 10% CeO.sub.2/Al.sub.2O.sub.3, 20% CeO.sub.2—Al.sub.2O.sub.3 (20CeAlOy), 30% CeO.sub.2—Al.sub.2O.sub.3 (30CeAlOy), Al.sub.2O.sub.3, and MOx-Al.sub.2O.sub.3, wherein M is one of copper, iron, manganese, titanium, zirconium, magnesium, strontium, and barium. The palladium catalyst material includes a layer of CeO.sub.2 material disposed upon the support material, wherein the layer of CeO.sub.2 material is dispersed on a surface of the support material. The palladium catalyst material includes an active component including a layer of praseodymium oxide particles dispersed across the surface of the layer of CeO.sub.2 material and a layer of palladium particles disposed upon and dispersed across the surface of the layer of CeO.sub.2 material at locations each corresponding to a respective location of each of the praseodymium particles.

A calcium silicate based nickel catalyst and a preparation method and application thereof are provided. The method includes: leaching a silicon based solid waste with an alkali agent to obtain a silicate leaching solution; adding the silicate leaching solution and a nitrate solution corresponding to a lanthanum metal dropwise to a calcium hydroxide suspension for a first precipitation reaction, and subjecting a precipitate produced by the reaction to filtration, drying and calcination to obtain a modified calcium silicate support; and dispersing the modified calcium silicate support in an anhydrous alcohol solvent to obtain a mixed suspension, adding an alcohol solution of a nickel salt dropwise to the mixed suspension for a second precipitation reaction, conducting heating and stirring until alcohols in the anhydrous alcohol solvent and the alcohol solution of a nickel salt are volatilized, and conducting drying and calcination to obtain the modified calcium silicate based nickel catalyst.