A method for preparing methyl formate and co-producing dimethyl ether

Abstract

The application provides a method for preparing methyl formate and co-producing dimethyl ether, which comprises disproportionating raw materials containing methylal through a reactor loaded with an acidic molecular sieve catalyst to prepare methyl formate and co-producing dimethyl ether. In the method of the present application, the requirement for the purity of the raw material methylal is not high, the service life of the catalyst is long, the reaction conditions are mild, the atom economy is high, continuous production is possible, and it has the potential for large-scale industrial application.

Description

technical field [0001] The application relates to a preparation method of methyl formate. Background technique [0002] in C 1 In chemistry, after methane chemistry, synthesis gas chemistry and methanol chemistry, methyl formate has gradually developed into a new C 1 Starting materials and building blocks of chemicals. Starting from methyl formate, formic acid, acetic acid, ethylene glycol, methyl propionate, methyl acrylate, methyl glycolate, N-formylmorpholine, N-methylformamide, N,N-dimethyl Formamide and many other C 1 Chemical chemical products. [0003] At present, the technologies for synthesizing methyl formate include: methanol carbonylation method, methanol catalytic dehydrogenation method, methanol oxidative dehydrogenation method, carbon dioxide and methanol hydrogenation condensation method, synthesis gas direct synthesis method, etc. Among them, methanol carbonylation is the main method of industrial production of methyl formate at home and abroad. The ca...

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Problems solved by technology

The catalyst used in this process is generally sodium methoxide, which is easily hydrolyzed by water to form insoluble sodium formate, causing pollution and blockage, and the separation of the catalyst is difficult. Sensitive, the purity requirements of raw materials are very strict

In view of the above reasons, the production scale of a single set of this process route is generally within 100,000 tons / year, and it is difficult to form a scale effect

In addition, the process needs to go through gas production, water gas shift and pressure swing adsorption to obtain carbon monoxide. The investment is very high, which is not conducive to the use of small and medium-sized enterprises.

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