40results about How to "Improve hydrogenation reactivity" patented technology

The invention relates to a hydrocracking catalyst for heavy oil and a preparation method of the hydrocracking catalyst. The hydrocracking catalyst for the heavy oil is organic molybdenum salt containing molybdenum ions and C1-C16 organic anions bound with the molybdenum ions, wherein the organic anions contain oxygen atoms, and the valence state of molybdenum in the molybdenum ions is +4, +5 and +6 in a molar ratio of (0.1-25.0):(10.0-40.0):(45.0-85.0). The provided hydrocracking catalyst for the heavy oil has good solubility in hydrocarbon oil, hydrogenation reaction activity is improved, reaction coke generation is inhibited, and conversion of residual oil is effectively promoted. The preparation process of the hydrocracking catalyst for the heavy oil is simple, a filtration step is notneeded, and the synthesis cost is lower.

The invention discloses a catalyst for preparing propionitrile, a method for preparing the catalyst and a method and a device for applying the same. The catalyst comprises a carrier portion and a metal salt portion. The carrier portion is a gamma-aluminum oxide carrier, and the metal salt portion comprises nickel salt, copper salt and zinc salt. Compared with the prior art, the catalyst, the methods and the device have the advantages that the catalyst is high in activity, active component dispersity, acrylonitrile conversion rate and propionitrile selectivity, good in stability and long in service life; technologies for preparing the catalyst are simple, applied catalytic reaction is easy to control, and technologies are relatively simple; the catalyst is low in preparation cost and short in preparation process, is made of inexpensive materials and only has simple equipment requirements.

The invention discloses a hydrogenation method of an unsaturated copolymer, which comprises the following steps: (1) dissolving the unsaturated copolymer in an organic solvent, filling and degassing; (2) adding a catalyst for hydrogenation and compounding body, the catalyst for hydrogenation has the following general formula: M1aM2bXmLn; (3) charge hydrogen, stir, and react, the conditions of the reaction include: the reaction temperature is 0-30 ° C, the hydrogen pressure is 0.05-15Mpa, the reaction The time is 1-120 minutes; (4) heating up to 50-180°C, keeping the hydrogen pressure at 0.1-15Mpa, and reacting for 1-20 hours; (5) removing the organic solvent in the reaction product obtained in step (4). By adopting the method of the invention, the application cost of the catalyst can be reduced, the reaction can be implemented more easily, the hydrogenation reaction activity is high, the hydrogenation degree of the hydrogenation product can be significantly improved, and the product has no obvious increase in gel content.

The invention discloses a preparation method for a granular hydrogenation catalyst. The method comprises the following steps of: preparing aluminum hydroxide colloid at a relatively low temperature by adopting pH value oscillation colloid formation, adding an ammonia solution containing Mo and Ni after the low-temperature colloid formation, stabilizing the solution for certain time at a high temperature, filtering, washing, drying, crushing the dried colloid powder into granules, and thus obtaining the granular hydrogenation catalyst by roasting. By the method, the granular hydrogenation catalyst with large aperture, large specific surface area, low abrasion and uniform active metal distribution can be prepared. The hydrogenation catalyst is particularly suitable to be used as a boiling bed residuum hydro-treating catalyst, and can reduce the diffusion limitation of macromolecular compounds such as colloid and bituminous matter and the like in the residuum in the catalyst; the hydrogenation reaction activity of the catalyst can be improved; the catalyst has strong abrasion resistance; the consumption of the catalyst is reduced; and meanwhile, the influence of the catalyst on the downstream reaction or equipment is also reduced.

The invention provides a purification method for glycol. The purification method comprises the following steps: (1) physical adsorption: allowing a crude glycol product to pass through an active carbon bed for physical adsorption so as to obtain a first material flow; and (2) hydrofinishing: subjecting the first material flow, hydrogen and a compound hydrogenation catalyst to a contact reaction, wherein the composite hydrogenation catalyst comprises continuous-phase carbon and dispersion-phase Raney alloy particles, the dispersion-phase Raney alloy particles are uniformly or nonuniformly dispersed in the continuous-phase carbon, and the continuous-phase carbon is prepared by carbonizing carbonizable organic matters or mixtures thereof. The method provided by the invention can realize high-efficiency purification and substantially improves the UV transmittance of glycol.

The invention relates to the hydrogenation field of butyronitrile latex, and discloses a hydrogenation method of butyronitrile latex. The method includes steps of (1), mixing butyronitrile latex, hydrogenation catalyst and ligand; (2), orderly performing first hydrogenation reaction and second hydrogenation reaction on the mixture obtained in step (1) in the presence of hydrogen, wherein the reaction temperature of the first hydrogenation reaction is 0-30 DEG C, and the reaction temperature of the second first hydrogenation reaction is 50-180 DEG C; (3), removing solvent in the reaction product obtained in step (2). The method is applied to perform hydrogenation on the butyronitrile latex, improve the hydrogenation activity of the hydrogenation catalyst and hydrogenation degree of the hydrogenation product; the hydrogenation product is free from obvious gel growth by comparing with the nitrile rubber before the butyronitrile latex before hydrogenation; moreover, the hydrogenation method is simple in operation, short in reaction time, easy to practice, and low in hydrogenation cost.

A carried Pd complex catalyst with high hydrogenation reaction activity is prepared through ion exchanging reaction between lysine hydrochloride and exchangeable inorganic carrier, complexing reaction on H2PdCl4 to generate Pd-lysine complex, and reducing reaction to obtain PdO-lysinolinorganic carrier catalyst.

The invention relates to the field of copolymers, and discloses a method for preparing polymers. The method includes steps of (1), mixing glue solution of unsaturated polymers and hydrogenation catalysts with one another; (2), sequentially carrying out first hydrogenation reaction and second hydrogenation reaction on mixtures obtained at the step (1) in the presence of hydrogen; (3), removing solvents in reaction products obtained at the step (2). The hydrogenation catalysts contain organic compounds of organic aluminum and metal of VIIIB groups. The reaction temperatures of the first hydrogenation reaction range from -10 DEG C to 15 DEG C, and the reaction temperatures of the second hydrogenation reaction range from 40 DEG C to 120 DEG C. The method for preparing the polymers has the advantages that the hydrogenation reaction activity of the hydrogenation catalysts and the hydrogenation degrees of hydrogenation products can be improved, and the method is easy to operate and implement, short in reaction time and low in preparation cost.

One kind of arene hydrogenating catalyst with high hydrogenating activity and high sulfur poisoning resistance and its simple preparation process are provided. The arene hydrogenating catalyst consists of nickel oxide, boron oxide and tungsten oxide. Its preparation process includes weighing nickel carbonate or basic nickel carbonate powder, adding boric acid solution of 1.0 mol / L concentration, adding tungstic acid, ammonium paratungstate or ammonium metatungstate solution, mixing, stoving, roasting, and tabletting. The preparation process is short and simple, and the catalyst has pore volume greater than 0.18 cu cm / g, specific surface area greater than 180 sq m / g, high arene hydrogenation activity, and high sulfur poisoning resistance.