A catalyst for preparing succinic anhydride by hydrogenating maleic anhydride and a preparation method thereof

Abstract

A method for preparing a catalyst for the hydrogenation of maleic anhydride to succinic anhydride includes: adding a mixture of alumina, rutile, and anatase as a composite support to an aqueous solution of a nickel precursor, rotary evaporation to dryness, drying the resulting solid to obtain a catalyst precursor; calcination and reduction at 400-600℃ to obtain the catalyst; the nickel weight percentage is 3-20 wt%. By selecting appropriate calcination and reduction temperatures, the degree of interaction between the composite support and metallic nickel can be controlled in this process, resulting in a catalyst with a more stable structure, effective control of nickel sintering and loss, high dispersion of active components, high hydrogenation activity, and the ability to achieve the effect of a high-load catalyst with a lower nickel loading.