Catalyst for producing 1,4-butylediol and preparation method and use thereof

Abstract

The invention relates to a catalyst that is used for preparing 1,4-butanediol by diethyl succinate hydrogenation and a preparation method of the catalyst. In the total weight of the catalyst, cupric oxide accounts for 30 to 60 weight percent (Wt), zinc oxide accounts for 20 to 50 weight percent (Wt), and titanium oxide accounts for 5 to 20 weight percent (Wt). In the preparation, the dissoluble salts of copper, zinc and titanium are mixed according to the proportions thereof in the total weight of the catalyst and dissolved in deionized water, thus preparing a metallic ion mixture solution, under water-bath heated agitation, the metallic ion mixture solution and a precipitator are drop-added in current flow, the pH value of the solution is controlled between 7 and 8, the solution is agitated at constant temperature for 1 to 3 hours, temperature is raised to 70 to 80 DEG C for aging for 2 to 20 hours, precipitate is filtered, the precursor precipitate is rinsed by deionized water so as to remove impurity ions, and then the precipitate is dried at the temperature of 110 to 120 DEG C for 8 to 12 hours and baked in a muffle furnace at the temperature of 350 to 550 DEG C for 3 to 5 hours. The invention has the advantages that the provided catalyst has standardized pore structure, higher specific surface, higher activity, good selectivity, and the production and recycling without environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a catalyst for hydrogenating diethyl succinate to prepare 1,4-butanediol, a preparation method and an application. Background technique [0002] 1,4-Butanediol, referred to as BDO, is a basic organic chemical and fine chemical raw material with a wide range of uses. There are mainly 4 product chains: (1) Production of polybutylene terephthalate (PBT for short), PBT resin It is a new type of thermoplastic polyester engineering plastic, which can be used in electronics, electrical appliances, automobiles and other industries; (2) to produce γ-butyrolactone (GBL for short), γ-butyrolactone has extremely high reactivity and is mainly used for Production of vinylpyrrolidone, polyvinylpyrrolidone, N-methylpyrrolidone, etc.; (3) production of tetrahydrofuran (referred to as THF), tetrahydrofuran is mainly used as a solvent and pharmaceutical intermediates, tetrahyd...

AI Technical Summary

Problems solved by technology

The above catalysts all use chromium-containing oxide catalysts. Although they have high catalytic activity and good selectivity, the manufacture and recovery of such catalysts will cause serious pollution to the environment.