Catalyst for aldehyde liquid phase hydrogenation and preparation method thereof

Abstract

The invention discloses a catalyst for aldehyde liquid phase hydrogenation and a preparation method thereof, relates to the technical field of aldehyde liquid phase hydrogenation catalysts, and aims to solve the technical problems that an aldehyde liquid phase hydrogenation catalyst in the prior art cannot give consideration to both activity and selectivity, and the stability of the catalyst is poor. The preparation method of the catalyst comprises the following steps: (1) heating deionized water, adding aluminum salt and ammonium tungstate, continuously stirring at a constant temperature, slowly adding an ammonium carbonate solution, controlling the pH value to be 8-9, continuously stirring, aging, washing and drying to obtain a precursor; (2) uniformly mixing the precursor with a phosphoric acid solution containing polydimethylpolysiloxane, performing hydrothermal treatment, drying, roasting, grinding and screening to obtain a carrier; and (3) preparing nickel salt, lithium salt, manganese salt and aluminum salt into steeping liquor, adding triethyl phosphate into the steeping liquor, and washing, drying and roasting after steeping to obtain the catalyst. The catalyst prepared by the method is mainly used in an octenal liquid phase hydrogenation catalytic reaction process.

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