Patent ID: 9708240
Date: 2017-07-18
CPC Classifications: C07C

Claim:
1. A method for preparing a polyoxymethylene dimethyl ether carbonyl compound as an intermediate for producing ethylene glycol by carbonylation, wherein a raw material: polyoxymethylene dimethyl ether CH 3 O(CH 2 O) n CH 3 , together with carbon monoxide and hydrogen gas is passed through a reactor carrying an acidic molecular sieve catalyst, and a reaction is performed to prepare a product: a polyoxymethylene dimethyl ether carbonyl compound, under conditions wherein the reaction temperature is 60-140° C., the reaction pressure is 2-10 MPa, the weight hourly space velocity of polyoxymethylene dimethyl ether is 0.2-10.0 h −1 , and no other solvent is added, wherein under the condition of the reaction, at least one of the raw material and the product is liquid phase, the acidic molecular sieve catalyst is solid phase, and carbon monoxide and hydrogen gas are gas phase, such that the process of the reaction is a gas-liquid-solid three-phase reaction, and the molar ratio of carbon monoxide to the raw material is 2:1-20:1 and the molar ratio of hydrogen gas to the raw material is 1:1-5:1, wherein n≧2 and is an integer, wherein the acidic molecular sieve catalyst is selected from the group consisting of MCM-22 molecular sieve, ferrierite, ZSM-5 molecular sieve, Y zeolite, Beta molecular sieve, and combinations thereof, the reactor is a fixed bed reactor which facilitates continuous reaction.