5results about How to "High hydrogenation selectivity" patented technology

The invention provides a supported catalyst and a preparation method thereof, and belongs to the technical field of hydrogenation catalysts, and the preparation method comprises the following steps: preparing a double-ligand nickel compound solution, dissolving tert-butyl modified bis (1-methylimidazolyl) ethane and 1, 10-phenanthroline in absolute ethyl alcohol, stirring, adding nickel salt, and uniformly stirring again to obtain the double-ligand nickel compound solution; the preparation method comprises the following steps: preparing an aluminum oxide-silicon oxide composite carrier, adding a caffeine solution and an alkali solution into a mixed solution of an aluminum precursor solution and a silicon precursor solution, uniformly stirring, gelatinizing, and carrying out two-step calcination to obtain the aluminum oxide-silicon oxide composite carrier, immersing the aluminum oxide-silicon oxide composite carrier into a double-ligand nickel compound solution, uniformly stirring, and drying to obtain the catalyst. And filtering, washing and drying to obtain the supported catalyst. According to the technical scheme provided by the invention, the purpose of efficient hydrogenation of the supported catalyst is achieved.

The invention relates to a synthesis process of cyclopentyl methyl ether CPME, which firstly depolymerizes dicyclopentadiene DCPD to cyclopentadiene CPD through a depolymerization kettle at high temperature, then mixes the cyclopentadiene CPD with hydrogen and enters a hydrogenation catalytic distillation tower to generate cyclopentene CPE through a selective hydrogenation reaction, and then etherifies the cyclopentene CPE with methanol to obtain cyclopentyl methyl ether CPME, and the etherification reaction adopts a fixed bed and catalytic distillation combined process. The process of the invention is simple, energy-saving, and highly feasible; the hydrogenation and etherification catalysts have high conversion rates and good selectivity, and the process has the characteristics of high total conversion rate and good selectivity; through the selective hydrogenation of raw material C5, dienes are removed, which is conducive to extending the service life of the etherification catalyst, and the catalytic distillation process is adopted to make the temperature distribution of the reaction temperature area stable, the reaction heat is fully utilized, and the heat consumption is reduced.

The application discloses a preparation method of an oil slurry selective hydrogenation catalyst, and comprises the following steps: (1) preparing a molybdenum-cobalt impregnation solution with a volume greater than the pore volume of a catalyst carrier; (2) adding the catalyst carrier into a rotary vacuum impregnation dryer, spraying the molybdenum-cobalt impregnation solution onto the catalyst carrier under the conditions of rotation and vacuum, and then performing vacuumizing, rotary drying, and calcination to obtain the oil slurry selective hydrogenation catalyst. The oil slurry selective hydrogenation catalyst prepared by the method has both desulfurization activity and low three-ring and four-ring aromatic hydrocarbon saturation performance, and is suitable for a selective hydrogenation desulfurization reaction of catalytic oil slurry.

The present invention provides a kind of loaded catalyst and preparation method thereof, belong to the technical field of hydrogenation catalyst, comprise the following steps: prepare double ligand nickel complex solution, dissolve tert-butyl modified bis (1 methylimidazolyl) ethane and 1,10 phenanthroline in anhydrous ethanol, stir, add nickel salt, stir evenly again, obtain double ligand nickel complex solution; prepare aluminum oxide silicon oxide composite support, add caffeine solution and alkali solution to the mixed solution of aluminum precursor solution and silicon precursor solution, stir evenly, gelate, obtain aluminum oxide silicon oxide composite support after two-step calcination, immerse the aluminum oxide silicon oxide composite support in double ligand nickel complex solution, stir evenly, filter, wash and dry, obtain loaded catalyst. The technical scheme provided by the present invention realizes the purpose of efficient hydrogenation of loaded catalyst.