Metal silicide catalyst of selective hydrogenation 1,4-butynediol and application of metal silicide catalyst

Abstract

The invention relates to a metal silicide catalyst of selective hydrogenation 1,4-butynediol and application of the metal silicide catalyst. Temperature programmed silicification is performed on a corresponding metal catalyst under the atmosphere of organosilane to form the metal silicide catalyst. The invention provides a new technology: on the condition of low temperature and medium pressure, catalytic hydrogenation is performed on high-concentration 1,4-butynediol in one step in a fixed bed reactor through the metal silicide catalyst so as to prepare 1,4-butylene glycol. Compared with the traditional Lindlar catalyst, the prepared metal silicide catalyst has efficient hydrogenation activity, high stability and excellent industrial application prospect, is well adapted to the fluctuation of water in the reaction system so as to better restrain carbon deposition, and the addition of silicon enables higher selectivity of intermediate products, so that adoption of a poisonous addition agent is avoided.

Description

technical field [0001] The invention belongs to the field of fine chemical industry, and relates to a metal silicide catalyst for selectively hydrogenating 1,4-butynediol to prepare 1,4-butenediol and a preparation method for temperature-programmed silicification. More specifically, the present invention relates to a method of preparing 1,4-butanediol from high-concentration 1,4-butynediol by one-step catalytic hydrogenation of 1,4-butynediol in a fixed-bed reactor over a metal silicide catalyst under medium pressure conditions New technology for enediols. Compared with the traditional Lindlar catalyst, the prepared metal silicide catalyst has high-efficiency hydrogenation activity, the incorporation of silicon leads to an increase in the selectivity of intermediate products, avoids the use of poisoning additives, and has strong adaptability to water fluctuations in the reaction system , can well inhibit carbon deposition, exhibit high stability, and have good industrial appl...

AI Technical Summary

Problems solved by technology

[0008] Chinese patent, publication number: CN1172792A, introduces the method that butynediol prepares butanediol through two-step method, and its first step used catalyst is suspended palladium-carrier catalyst, and the second step adopts nickel-carrier catalyst, adopts two stages to add Hydrogen process, the steps are cumbersome, the cost is high, the reaction pressure is high and the yield of the target product 1,4-butenediol is not high

[0009] Chinese patent, publication number: CN101306368A, introduces the preparation method of butynediol two-step hydrogenation to butanediol two-stage hydrogenation catalyst, uses surfactant, adopts impregnation method to prepare nickel-based supported catalyst, but does not consider the catalyst Stability in this reaction, and the active ingredient of the catalyst is easy to lose in the catalytic reaction

Images