METHOD FOR PREPARING POLYOXYMETHYLENE DIMETHYL ETHER CARBONYL COMPOUND AND METHYL METHOXYACETATE

摘要

Provided is a method for preparing a polyoxymethylene dimethyl ether carbonyl compound and/or methyl methoxyacetate serving as an intermediate for producing ethylene glycol, comprising: passing a raw material polyoxymethylene dimethyl ether or dimethoxymethane together with carbon monoxide and hydrogen gas through a reactor carrying a delumination-modified acidic zeolite catalyst, and preparing corresponding products by reacting in appropriate reaction conditions without adding any other solvent, where the reaction process is a gas-liquid-solid three-phase reaction. In the method of the present invention, the conversion rate of the raw material polyoxymethylene dimethyl ether or dimethoxymethane is high, the selectivity of the products is high, catalyst service life is extended, the need for additional solvent is obviated, the reaction conditions are relatively mild, continuous production is allowed, and the potential for industrial application is provided. Also, the products acquired can either be hydrogenated then hydrolyzed or be hydrolyzed then hydrogenated to produce ethylene glycol.