Hydrogenation catalyst, preparation method and applications thereof

Abstract

The invention provides a hydrogenation catalyst, a preparation method and applications thereof, wherein the hydrogenation catalyst comprises, by mass, 55-65% of aluminum oxide, 30-44% of copper oxideand 1-7% of bismuth oxide, the particle size distribution of the catalyst comprises 2-10% of the particles with a particle size of less than 30 [mu]m, 70-90% of the particles with a particle size of 30-60 [mu]m, and 8-20% of the particles with a particle size of more than 60 [mu]m, the pore volume of the catalyst is 0.01-0.03 mL / g, and the specific surface area of the catalyst is 2-10 m<2> / g. According to the preparation method, a molded aluminum oxide carrier is placed into an immersing solution, immersing is performed, and drying and roasting are performed to obtain the catalyst, wherein theimmersing solution contains at least one selected from the nitrate of Cu and Bi, and further contains an organic complexing agent, and the roasting adopts a staged roasting method. According to the present invention, the catalyst granularity shaping is achieved by using the metal nitrate decomposition and the gas release during the roasting, and the organic complexing agent can provide the dispersion effect, such that the centralized and uniform catalyst particle size distribution can be achieved; and the particle size of the catalyst is regulated by controlling the heating rates of each temperature sections.

Description

technical field [0001] The invention relates to a hydrogenation catalyst and a preparation method thereof. The catalyst is mainly used in the process of synthesizing 1,4-butynediol by alkyne aldehyde method. Background technique [0002] 1,4-Butanediol (BDO) is an important polymer monomer. At present, the technological routes for industrialized production of BDO include the alkyne aldehyde method, butadiene method, propylene oxide method and maleic anhydride method, among which the alkyne aldehyde method is the most important production process in the world. The key of the alkyne aldehyde method is to prepare 1,4-butynediol intermediate, which is produced by the reaction of raw materials acetylene and formaldehyde under the action of a catalyst, and can be obtained by further two-stage hydrogenation at low pressure and high pressure. 1, 4-Butanediol product. As the source reaction for the production of 1,4-butanediol and the downstream industrial chain, the acetylation of...

AI Technical Summary

Problems solved by technology

However, due to the lack of support, the dispersion of the active components of these two catalysts is poor, and the effective utilization rate is low; more importantly, the wear of the catalyst is serious, and the active components are easy to lose, resulting in a short catalyst life.

Patent US3920759 reports a supported catalyst with magnesium silicate as a carrier. The carrier increases the dispersion of active components and the wear resistance of the catalyst, but the strong interaction between magnesium silicate and copper species makes it difficult for CuO to be Effective activation, some copper species cannot be converted into active center alkyne copper complexes; on the other hand, this method must first prepare magnesium silicate carrier, and then use impregnation method to load active components, which increases the operation process

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