Preparation method of methanol synthesis catalyst

Abstract

The invention provides a preparation method of a methanol synthesis catalyst. The preparation method comprises the following steps: co-precipitating soluble salts of copper, zinc and aluminum as well as an aqueous solution of an alkali metal salt to obtain a parent substance, and washing, drying, baking, tabletting, crushing and screening the parent substance to form particles; and preparing a salt solution of active components, dipping the particles in the solution in a vacuum environment by an isovolumetric mode, and drying and baking the dipped material to obtain the finished product of the methanol synthesis catalyst. By utilizing the preparation method of the methanol synthesis catalyst, the problems such as uneven distribution and high possibility of inactivation of surface active components of the catalyst obtained by the preparation method in the prior art are solved; and for the methanol synthesis catalyst obtained by the preparation method provided by the invention, the surface active components thereof are evenly distributed and not easily inactivated.

Description

technical field [0001] The invention belongs to the field of catalysts for synthesizing methanol, in particular to a method for preparing a catalyst for synthesizing methanol from CO, CO2 and H2. Background technique [0002] Methanol is one of the most basic organic chemical raw materials. In recent years, the demand and production capacity of methanol have continued to grow, and the use of methanol has also undergone new developments. Industrial-scale methanol is generally made with H 2 , CO, CO 2 The synthesis gas is produced by reacting under the conditions of certain pressure and temperature and the presence of a catalyst. With the continuous progress of synthetic methanol production technology, it was found that Cu-Zn-Al catalysts have good low-temperature methanol synthesis activity. The patent document whose publication number is CN101185894A discloses a preparation method of a copper-based catalyst. A mixed solution containing copper and zinc is co-precipitated ...

AI Technical Summary

Problems solved by technology

[0003] For this reason, the technical problem to be solved by the present invention is that in the preparation process of the catalyst preparation method in the prior art, the additive components are easily deactivated, and the obtained catalyst surface additives are unevenly distributed, thereby providing a catalyst for synthesizing methanol The preparation method, the additive components are not easy to deactivate during the preparation process, and the surface additives of the prepared methanol catalyst are evenly distributed