One-step catalytic synthesis method for 2-methoxyethanol benzoate

A technology of ethylene glycol methyl ether and benzoate, applied in the field of fine chemicals, can solve the problems of easy environmental pollution, difficult product processing, complicated processes, etc., and achieves less environmental pollution, high reactivity, and good product selectivity. Effect

Active Publication Date: 2015-12-16
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of method of one-step catalytic synthesis ethylene glycol methyl ether benzoate, and this method has avoided complicated technique in traditional two-step reaction, easy environmental pollution, problems such as product processing difficulty; Raw material conversion rate is high , good product selectivity; simple process, low energy consumption, and the catalyst is easy to separate, reusable, green and environmentally friendly

Method used

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  • One-step catalytic synthesis method for 2-methoxyethanol benzoate
  • One-step catalytic synthesis method for 2-methoxyethanol benzoate
  • One-step catalytic synthesis method for 2-methoxyethanol benzoate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 163.8g methyl benzoate and 3.2g catalyst (magnesium-aluminum-manganese salt cation molar ratio is Mg:Al:Mn=1:1:0.04) are added in the reactor that volume is 2L, airtight stirring, with N 2 Replace the air in the kettle, heat up, and when the temperature reaches 120°C, continue to feed 52.86g of ethylene oxide into the reaction kettle, the pressure in the reaction kettle is 0.15-0.50MPa, and the reaction temperature is constant at 120°C. The reaction raw material mol ratio is methyl benzoate: oxirane=1:1. Ethylene oxide conversion rate is 76.47%, ethylene glycol methyl ether benzoic acid ester productive rate is 26.40%, diethylene glycol methyl ether benzoic acid ester productive rate is 26.07%, triethylene glycol methyl ether benzoic acid The ester yield was 14.47%.

Embodiment 2

[0028] 164.0g methyl benzoate and 2.9g catalyst (magnesium aluminum manganese salt cation molar ratio is Mg:Al:Mn=1:1:0.04) are added in the reaction kettle that volume is 2L, airtight stirring, with N 2 Replace the air in the kettle, heat up, and when the temperature reaches 120°C, continue to feed 26.43g of ethylene oxide into the reactor, the pressure in the reactor is 0.20-0.45MPa, and the reaction temperature is constant at 120°C. The molar ratio of the reaction raw materials is methyl benzoate: oxirane=2:1. Ethylene oxide conversion rate is 85.23%, ethylene glycol methyl ether benzoic acid ester productive rate is 33.83%, diethylene glycol methyl ether benzoic acid ester productive rate is 29.93%, triethylene glycol methyl ether benzoic acid ester The ester yield was 16.19%.

Embodiment 3

[0030] 245.2g of methyl benzoate and 4.1g of catalyst (magnesium-aluminum-manganese salt cation molar ratio is Mg:Al:Mn=1:1:0.04) were added into a reaction kettle with a volume of 2L, sealed and stirred, and heated with N 2 Replace the air in the kettle, heat up, and when the temperature reaches 120°C, continue to feed 26.38g of ethylene oxide into the reactor, the pressure in the reactor is 0.15-0.45MPa, and the reaction temperature is constant at 120°C. The molar ratio of the reaction raw materials is methyl benzoate: oxirane=3:1. Ethylene oxide conversion rate is 86.39%, ethylene glycol methyl ether benzoic acid ester productive rate is 46.99%, diethylene glycol methyl ether benzoic acid ester productive rate is 25.95%, triethylene glycol methyl ether benzoic acid ester The ester yield was 9.84%.

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Abstract

The invention relates to a one-step catalytic synthesis method for 2-methoxyethanol benzoate. The method comprises the steps of with methyl benzoate and epoxyethane as raw materials and Mg-Al-Mn composite oxide as a solid catalyst, stirring in a reaction kettle in a sealing way; replacing air in the kettle with N2; heating to the set temperature; carrying out ring opening on epoxyethane, and embedding epoxyethane into an ester bond of methyl benzoate; and reacting to synthesize 2-methoxyethanol benzoate. The one-step catalytic synthesis method has the advantages that 2-methoxyethanol benzoate can be obtained through one-step reaction, the conversion rate of the raw materials is high, the selectivity is good, the problems that the traditional esterificaiton reaction is rigorous in equipment requirement and 2-methoxyethanol benzoate is relatively difficult to treat are avoided, and a catalyst is easily separated, can be recycled and is environment-friendly.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a synthetic method of ethylene glycol methyl ether benzoate. Background technique [0002] The molecular structure of ethylene glycol methyl ether benzoate contains alkyl groups, ether bonds, carbonyl groups, and benzene rings. It has good solubility and excellent performance that ordinary solvents do not have. [0003] The raw materials based on ethylene oxide and propylene oxide are an important method for producing polyoxyalkylene fine chemicals. Glycol ether solvents are one of the important derivatives of epoxy compounds and have a wide range of industrial applications. Applications. Glycol ether ester compounds have low toxicity and excellent performance, and have gradually replaced glycol ether products in various fields, mainly used in coatings, inks, cleaning agents and other industries. [0004] The traditional process of synthesizing ethylene glycol methyl eth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/78C07C67/26
CPCC07C67/26C07C69/78
Inventor 郭登峰王明贺赵会晶刘准宋文娟王燕
Owner CHANGZHOU UNIV
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