A method for producing butadiene comprises a step of supplying a raw material gas containing 2-butene and an oxygen-containing gas containing molecular oxygen to a reactor filled with a catalyst to obtain a produced gas containing butadiene, wherein the catalyst contains a composite oxide containing molybdenum and bismuth, and a proportion of cis-2-butene in 2-butene in the raw material gas is 30 to 90 mol %.

Disclosed are a dehydrogenation catalyst having single-atom cobalt loaded onto a support including a zirconia core surface-modified with silica, a method for producing the dehydrogenation catalyst, and a method for producing corresponding olefin through dehydrogenation of paraffin, particularly light paraffin, in the presence of the dehydrogenation catalyst.

Disclosed are a dehydrogenation catalyst having single-atom cobalt loaded onto a support including a zirconia core surface-modified with silica, a method for producing the dehydrogenation catalyst, and a method for producing corresponding olefin through dehydrogenation of paraffin, particularly light paraffin, in the presence of the dehydrogenation catalyst.

The present invention belongs to the technical field of supported catalysts, and discloses a supported core-shell structured ZnO catalyst, and a preparation method and use thereof. With Al.sub.2O.sub.3 as a support and ZnO as active sites, the catalyst is characteristic of a NiZn@ZnO core-shell structure, which consists of a NiZn alloy core and a ZnO shell The preparation method comprises firstly dissolving Ni(NO.sub.3).sub.3.6H.sub.2O and Zn(NO.sub.3).sub.2.6H.sub.2O in deionized water; then impregnating Al.sub.2O.sub.3 with the solution described above, followed by uniform ultrasonic dispersion and complete drying; and finally the obtained solid is calcinated and reduced to obtain the target catalyst, which exhibits high activity, selectivity and stability. The catalyst can be used for the dehydrogenation of light alkanes to alkenes, especially in dehydrogenation of propane to propylene.

The present invention belongs to the technical field of supported catalysts, and discloses a supported core-shell structured ZnO catalyst, and a preparation method and use thereof. With Al.sub.2O.sub.3 as a support and ZnO as active sites, the catalyst is characteristic of a NiZn@ZnO core-shell structure, which consists of a NiZn alloy core and a ZnO shell The preparation method comprises firstly dissolving Ni(NO.sub.3).sub.3.6H.sub.2O and Zn(NO.sub.3).sub.2.6H.sub.2O in deionized water; then impregnating Al.sub.2O.sub.3 with the solution described above, followed by uniform ultrasonic dispersion and complete drying; and finally the obtained solid is calcinated and reduced to obtain the target catalyst, which exhibits high activity, selectivity and stability. The catalyst can be used for the dehydrogenation of light alkanes to alkenes, especially in dehydrogenation of propane to propylene.

System and method for producing 1-butene are disclosed. The method includes dehydrogenating butane to form a mixture comprising butene isomers. 1-butene is separated from the mixture using a system that includes a membrane. The system also includes an isomerizing unit for isomerizing cis-2-butene and trans-2-butene to form additional 1-butene.

System and method for producing 1-butene are disclosed. The method includes dehydrogenating butane to form a mixture comprising butene isomers. 1-butene is separated from the mixture using a system that includes a membrane. The system also includes an isomerizing unit for isomerizing cis-2-butene and trans-2-butene to form additional 1-butene.

A composite media for non-oxidative C.sub.2H.sub.6 dehydrogenation comprises an aluminosilicate zeolite matrix, and an EDH catalyst on one or more of an external surface of the aluminosilicate zeolite matrix and internal surfaces within pores of the aluminosilicate zeolite matrix. The EDH catalyst comprises one or more of Fe, Zn, Pt, Ga, alloys thereof, and oxides thereof. A C.sub.2H.sub.6 activation system, and a method of processing a C.sub.2H.sub.6-containing stream are also described.

A catalyst support comprising at least 95% silicon carbide, having surface areas of ≤10 m.sup.2/g and pore volumes of ≤1 cc/g. A method of producing a catalyst support, the method including mixing SiC particles of 0.1-20 microns, SiO.sub.2 and carbonaceous materials to form an extrusion, under inert atmospheres, heating the extrusion at temperatures of greater than 1400° C., and removing residual carbon from the heated support under temperatures below 1000° C. A catalyst on a carrier, comprising a carrier support having at least about 95% SiC, with a silver solution impregnated thereon comprising silver oxide, ethylenediamine, oxalic acid, monoethanolamine and cesium hydroxide. A process for oxidation reactions (e.g., for the production of ethylene oxide, or oxidation reactions using propane or methane), or for endothermic reactions (e.g., dehydrogenation of paraffins, of ethyl benzene, or cracking and hydrocracking hydrocarbons).

A catalyst support comprising at least 95% silicon carbide, having surface areas of ≤10 m.sup.2/g and pore volumes of ≤1 cc/g. A method of producing a catalyst support, the method including mixing SiC particles of 0.1-20 microns, SiO.sub.2 and carbonaceous materials to form an extrusion, under inert atmospheres, heating the extrusion at temperatures of greater than 1400° C., and removing residual carbon from the heated support under temperatures below 1000° C. A catalyst on a carrier, comprising a carrier support having at least about 95% SiC, with a silver solution impregnated thereon comprising silver oxide, ethylenediamine, oxalic acid, monoethanolamine and cesium hydroxide. A process for oxidation reactions (e.g., for the production of ethylene oxide, or oxidation reactions using propane or methane), or for endothermic reactions (e.g., dehydrogenation of paraffins, of ethyl benzene, or cracking and hydrocracking hydrocarbons).