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A kind of preparation method of monomethyl succinate

A technology of monomethyl succinate and succinic anhydride, which is applied in the field of preparation of monomethyl succinate, can solve the problems of unfavorable large-scale production, complicated separation process, and low product purity, and shorten the reaction time of esterification , Reasonable preparation process and high purity

Active Publication Date: 2016-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the synthesis and separation process of this method monomethyl succinate, added catalyst and reaction medium, introduced more organic solvents, product separation process is comparatively complicated, and influences yield, and product purity is not high, and solvent is very volatile, High cost, not conducive to large-scale production

Method used

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  • A kind of preparation method of monomethyl succinate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The molar ratio of succinic anhydride to methanol is 1:2, and the monoesterification reaction conditions are as follows: the reaction temperature is 100°C, the reaction pressure is 0.5MPa, and the reaction residence time is 1h. The speed of the supergravity reactor is 400rpm, and the liquid-gas ratio is 2L / Nm 3 , the cooling temperature of the liquid phase material is 10°C.

Embodiment 2-4

[0025] Same as Example 1, the difference is that the molar ratio of succinic anhydride and methanol varies between 1:1-4.

Embodiment 5-7

[0027] Same as Example 1, except that the temperature of the monoesterification reaction between succinic anhydride and methanol is changed between 70°C and 160°C.

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Abstract

The invention provides a method for preparing mono-methyl succinate. The method comprises the following steps: carrying out a mono-esterification reaction on succinic anhydride and methanol in a static mixer, conveying the reaction effluent into a high gravity reactor, and meanwhile filling water vapor into the high gravity reactor; cooling and separating the liquid material after the reaction to obtain mono-methyl succinate. The method for preparing mono-methyl succinate provided by the invention is reasonable in craft process, simple in separation method, high in product purity, good in quality and high in yield.

Description

technical field [0001] The invention relates to the field of fine chemicals, in particular to a method for preparing monomethyl succinate. Background technique [0002] Mono-Methyl Succinate (Mono-MethylSuccinate), the Chinese alias is monomethyl succinate, the CAS number is 3878-55-5, and the molecular formula is C 5 h 8 o 4 , Molecular weight 132.11, white crystal at room temperature, melting point 56℃~59℃, boiling point 151℃, soluble in organic solvents such as alcohol, ether and benzene, insoluble in water. Monomethyl succinate is an intermediate in organic synthesis and pharmaceutical synthesis, and is also a matrix material for the production of multicolored candles. It has the advantages of smokeless combustion and odorless combustion. [0003] The traditional preparation method of monomethyl succinate is the monoesterification reaction of succinic acid or succinic anhydride and methanol to produce monomethyl succinate. [0004] CN101831662A discloses a method for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/40C07C67/08C07C67/60C07C67/52
CPCC07C67/08C07C67/52C07C67/60C07C69/40
Inventor 田丹霍稳周李花伊乔凯程国香
Owner CHINA PETROLEUM & CHEM CORP
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