Method for preparing methyl glycolate and by-producing methyl methoxyacetate

A technology for by-producing methyl methoxyacetate and methyl glycolate is applied to the preparation of carboxylic acid by the reaction of carbon monoxide, the preparation of carbon monoxide or formate, and the preparation of carboxylate, which can solve the problem of polluting the environment and affecting the catalytic reaction performance. , low conversion rate of raw materials, etc., to achieve the effect of increasing the ratio of CO and aldehyde groups
CN107337602AActive Publication Date: 2017-11-10SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
Publication Date
2017-11-10

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Abstract

The invention provides a method for preparing methyl glycolate and by-producing methyl methoxyacetate, and relates to a chemical industry raw material preparation method. According to the method, by using methylal as a solvent, using trioxymethylene, formaldehyde tetramer or paraformaldehyde and methylal as a formaldehyde source, and using a solid acid or a liquid acid as a catalyst, in the presence of a right amount of water in a system, methyl glycolate is subjected to one-step high-conversion-rate and high-selectivity synthesis and methyl methoxyacetate is by-produced. According to the present invention, the reaction system can be performed under a low water condition, and the methyl methoxyacetate is the high added value pharmaceutical intermediate, and has excellent solubility, wherein organic matters can be dissolved in the methyl methoxyacetate, and the methyl methoxyacetate can be dissolved in water at any proportions, so the dissolving of the formaldehyde can be promoted, the formaldehyde can be dissolved in the methyl methoxyacetate, and a lot of CO in the gas phase can be dissolved in the methyl methoxyacetate during the reaction process so as to make the surface of the catalyst in the liquid phase contact more CO so as to significantly improve the ratio of CO to the aldehyde group in the liquid phase.
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Description

technical field

[0001] The invention relates to a method for preparing chemical raw materials, in particular to a method for preparing methyl glycolate and producing methyl methoxyacetate by-product. Background technique

[0002] Methyl glycolate (HOCH 2 COOCH 3 ), abbreviated as MG, is a colorless liquid with a pleasant smell, with a melting point of 74°C, a boiling point of 150°C, and a density of 1.168g / cm 3 , soluble in water, and soluble in alcohol and ether in any proportion. Methyl glycolate has α-H, hydroxyl and ester functional groups, so it has both the chemical properties of alcohols and esters, and can undergo carbonylation reactions, hydrolysis reactions, ammoniation reactions, oxidation reactions, etc. Methyl glycolate itself is an excellent solvent for many celluloses, resins and rubbers, and is easily soluble in nitrocellulose, cellulose acetate, polyvinyl acetate, etc. Methyl glycolate is also an important intermediate in organic synthesis and pharmaceut...

Claims

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