Catalyst for hydrogenolysis and preparation method thereof

Abstract

The invention discloses a catalyst for hydrogenolysis, which comprises the following components in percentage by mass: (a) 40-80% of component A; (b) 0.5 to 10% of a component B; (c) 0.01 to 1% of a component C; (d) 0.1 to 5% of a component D; and (e) 10-50% of a component E; the preparation method of the catalyst comprises the following steps: (1) dropwise adding a sodium carbonate solution and afirst metal salt solution into deionized water; (2) adding a second metal salt solution and the component E; and (3) filtering, forming and calcining the solution to form a catalyst finished product.According to the catalyst, a small amount of second metal components containing elements such as zinc, magnesium, calcium and barium are added into copper, nickel and palladium as main components, sothat the dispersion effect of the main components such as copper, nickel and palladium in the catalyst can be effectively improved, and meanwhile, the reaction activity and the reaction stability ofthe catalyst are improved.

Description

technical field [0001] The invention relates to a hydrogenolysis catalyst and a preparation method thereof. Background technique [0002] Propylene oxide is an important petrochemical organic raw material. The main production methods of this substance are chlorohydrin method and ethylbenzene peroxide method. The chlorohydrin method pollutes the environment seriously, and the ethylbenzene peroxide method has a large amount of co-produced by-product—styrene, so that the production cost of propylene oxide is affected by the price fluctuation of the co-product. In recent years, using cumene peroxide (CHP) as the oxygen source, the method of oxidizing propylene to produce propylene oxide has been gradually developed. This process is environmentally friendly and safe. The co-product α,α-dimethylbenzyl alcohol can be The hydrogenolysis reaction produces cumene, which can be returned to the peroxidation unit for recycling. Compared with the process of producing propylene oxide by ...

AI Technical Summary

Problems solved by technology

[0005] Usually only one of palladium, nickel, copper, etc. is used as a hydrogenolysis catalyst, and each single metal catalyst has certain defects in the actual application process: the palladium-based hydrogenolysis conversion rate is relatively high, but it will cause phenyl hydrogenation ; The reaction conditions required for nickel-based catalysts are relatively high, requiring high reaction temperature and pressure; the reaction conversion rate of copper-based catalysts is generally low

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