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Method for using ionic liquid catalyst with surface activity for synthesizing ethoxyquin

A technology of ethoxyquinoline and ionic liquid, applied in organic chemistry, chemical recovery, etc., can solve the problems of high reaction temperature, long reaction time, high process cost, etc., achieve good thermal stability, reduce process cost, high acid The effect of catalytic activity

Inactive Publication Date: 2019-09-24
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing synthesis methods have problems such as high reaction temperature and long reaction time, which lead to high energy consumption, high process cost, and environmental pollution

Method used

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  • Method for using ionic liquid catalyst with surface activity for synthesizing ethoxyquin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 68.5g of p-aminophenethyl ether and 14g of catalyst into the reactor at one time, mix thoroughly, heat up, and add 64g of acetone dropwise under normal pressure at a reaction temperature of 70°C. The reaction time is 6h, and the reaction The temperature of the liquid is cooled to room temperature, and the unreacted acetone is condensed and then enters the acetone recovery device to recover acetone; a small amount of water is added to the reaction liquid, the liquid is separated, and the lower layer is separated for catalyst recovery and recycling; the upper layer ethoxyquinoline material separated by water is washed After the liquid is distilled, the finished product is obtained with a yield of 65%.

Embodiment 2

[0022] Add 68.5g of p-aminophenethyl ether and 14g of ionic liquid into the reactor at one time, mix thoroughly, heat up, and add 64g of acetone dropwise under normal pressure at a reaction temperature of 100°C. The reaction time is 5h. The temperature of the reaction liquid is cooled to room temperature, and the unreacted acetone is condensed and put into the acetone recovery device to recover acetone; a small amount of water is added to the reaction liquid, the liquid is separated, and the lower layer is separated for catalyst recovery and recycling; the separated upper layer of ethoxyquinoline is washed with water The finished product is obtained after the feed liquid is distilled, and the yield is 88%.

[0023] Example 3

[0024] Add 68.5g of p-aminophenethyl ether and 20g of ionic liquid into the reactor at one time, mix thoroughly, heat up, and add 64g of acetone dropwise under normal pressure at a reaction temperature of 110°C. The reaction time is 5h. The temperature ...

Embodiment 4

[0026] Add 68.5g of p-aminophenethyl ether and 20g of ionic liquid into the reactor at one time, mix thoroughly, heat up, and add 70g of acetone dropwise under normal pressure at a reaction temperature of 110°C. The reaction time is 8h. The temperature of the reaction solution is lowered to below 60°C, and the unreacted acetone is condensed and then enters the acetone recovery device to recover acetone; the reaction solution is washed with water, and the lower catalyst aqueous solution is separated, and the catalyst is recovered and recycled; the upper layer ethoxyquinoline separated by water is washed The finished product is obtained after the feed liquid is distilled, and the yield is 92%.

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Abstract

The invention relates to a method for using an ionic liquid catalyst with surface activity for synthesizing ethoxyquin, and belongs to the field of chemical synthesis. The catalyst is ionic liquid with surface activity, and the catalyst is high in catalytic activity, good in stability, short in catalytic reaction time, high in conversion per pass, easy to recover and recyclable; and the catalyst is also used as a solvent, so that no reaction solvents need to be additionally added. The method improves the production efficiency and reduces energy consumption of production.

Description

technical field [0001] The invention relates to the field of chemical synthesis, and relates to a method for synthesizing ethoxyquinoline with an ionic liquid catalyst having surface activity. Background technique [0002] Ethoxyquinoline, whose chemical name is 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline, is a highly efficient, low-toxic, and cheap antibiotic recognized in the world. Oxidizing agents are widely used in feed and food industries. It is suitable for full-price feed, fat-added products and fish meal. It can prevent feed oxidation and corruption, maintain animal protein feed energy, prevent oxidation and deterioration of vitamin A, vitamin E, and lutein, and prevent oxidation loss of fat-soluble vitamins and pigments. In addition, ethoxyquinoline can also be used as rubber anti-aging agent. [0003] Present ethoxyquinoline synthetic method mainly is to adopt p-aminophenethyl ether, acetone as raw material, toluene, xylene, benzene are solvent, p-aminobenzene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D215/20
CPCC07D215/20Y02P20/584
Inventor 庄玲华汤洋吴进勇
Owner NANJING UNIV OF TECH
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