Synthetic method of ethylene glycol monoallyl ether

A technology of propylene ether and ethylene glycol monolayer, applied in the field of fine chemicals, can solve the problems of difficult separation, recycling and reuse of catalysts, wide product distribution, equipment corrosion, etc. high effect

Active Publication Date: 2012-11-28
CHANGZHOU UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although potassium hydroxide or sodium hydroxide has the advantages of high catalytic activity and short reaction time, there are still problems suc

Method used

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  • Synthetic method of ethylene glycol monoallyl ether
  • Synthetic method of ethylene glycol monoallyl ether

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] Add 5.01g of catalyst and 290g of propylene alcohol into a reaction kettle with a volume of 2L, seal it, stir, and raise the temperature. When the temperature reaches 80°C, stop heating, and continue to introduce 44g of ethylene oxide into the reaction kettle. At this time, propylene alcohol The molar ratio to ethylene oxide is 5:1, the pressure inside the reactor is controlled to be 0.2~0.4MPa, and the reaction temperature is kept constant at 80°C by adjusting the amount of water passed into the cooling coil of the reactor. After the reaction, the conversion rate of ethylene oxide was 76.44%, and the yield of ethylene glycol monopropenyl ether was 67.29%.

Example Embodiment

[0029] Example 2

[0030] Add 5.01g of catalyst and 290g of propylene alcohol into a reaction kettle with a volume of 2L, seal it, stir, and raise the temperature. When the temperature reaches 90°C, stop heating, and continue to introduce 44g of ethylene oxide into the reaction kettle. At this time, propylene alcohol The molar ratio to ethylene oxide is 5:1, the pressure inside the reactor is controlled to be 0.2~0.4MPa, and the reaction temperature is kept constant at 90°C by adjusting the amount of water passed into the cooling coil of the reactor. After the reaction, the conversion rate of ethylene oxide was 89.68%, and the yield of ethylene glycol monopropenyl ether was 77.44%.

Example Embodiment

[0031] Example 3

[0032] Add 5.01g of catalyst and 290g of propylene alcohol into a reaction kettle with a volume of 2L, seal it, stir, and raise the temperature. When the temperature reaches 100°C, stop heating, and continue to introduce 44g of ethylene oxide into the reaction kettle. At this time, propylene alcohol The molar ratio to ethylene oxide is 5:1, the pressure inside the reactor is controlled at 0.2~0.4MPa, and the reaction temperature is kept constant at 100°C by adjusting the amount of water passed into the cooling coil of the reactor. After the reaction, the conversion rate of ethylene oxide was 97.46%, and the yield of ethylene glycol monopropenyl ether was 81.50%.

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Abstract

The invention relates to a synthesis method of ethylene glycol monoallyl ether. The method is characterized by: adding allyl alcohol and a catalyst into a reaction kettle, sealing the reaction kettle and then conducting stirring, at the same time carrying out heating to a set reaction temperature, then stopping heating, controlling the reaction pressure at 0.2-0.4MPa, and according to a molar ratio 6-2:1 of allyl alcohol to ethylene oxide, introducing the ethylene oxide into the reaction kettle continuously, after finishing ethylene oxide introduction, carrying out thermal preservation till the pressure inside the reaction kettle no longer declines, introducing cooling water to cool a discharged material, thus obtaining the ethylene glycol monoallyl ether. The catalyst is a loaded potassium fluoride/attapulgite solid catalyst. The method has the advantages of simple process, low energy and material consumption, less equipment investment, high ethylene oxide conversion rate, good environmental protection property, reusable catalyst, and effectively reduced production cost.

Description

technical field [0001] The invention relates to a method for synthesizing ethylene glycol monopropenyl ether. It belongs to the technical field of fine chemicals. Background technique [0002] Ethylene glycol monoallyl ether, also known as: allyl hydroxyethyl ether, is one of the important industrial derivatives of epoxy compounds and is an extremely important fine chemical. Its chemical structure has two dissolving functional groups - hydroxyl group and ether bond. The former is hydrophilic and can dissolve hydrophilic compounds; the latter is lipophilic and can dissolve hydrophobic compounds. In addition, ethylene glycol monopropenyl ether also contains polymerizable functional groups, showing high activity, and is a reactive diluent in cured materials. [0003] With the society's increasing emphasis on environmental protection and the continuous development of science and technology, environmentally friendly photocuring technology has also developed rapidly and has been...

Claims

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Application Information

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IPC IPC(8): C07C43/178C07C41/03B01J27/125
Inventor 郭登峰刘准赵文朱新宝曹惠庆蔡向阳
Owner CHANGZHOU UNIV
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