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A kind of adsorption impurity removal method of high-purity ethoxyquinoline

A technology of pure ethoxyquinoline and ethoxyquinoline, applied in the field of adsorption and impurity removal process of high-purity ethoxyquinoline, can solve the problem that the concentration of p-aminophenethyl ether cannot meet the new international standard

Active Publication Date: 2022-06-03
TAIXING RUITAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the concentration of p-aminophenethyl ether contained in ethoxyquinoline products produced in China cannot meet the new international standards, which limits the production enterprises of this product to enter the international market

Method used

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  • A kind of adsorption impurity removal method of high-purity ethoxyquinoline
  • A kind of adsorption impurity removal method of high-purity ethoxyquinoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) The ethoxyquinoline pretreatment with the p-aminophenethyl ether content of 100 ppm ensures that there is no solid matter in the crude oil and then carries out the adsorption operation;

[0040] (2) 5kg of ethoxyquin in the raw material tank was preheated to 30°C through a jacket heat exchanger, and passed through the filled alumina adsorption column from bottom to top at a flow rate of 5BV / h through a gear pump, while controlling the adsorption process The temperature is constant at 90 °C, and the qualified products flow out through the top of the adsorption column and enter the product tank;

[0041] (3) After the adsorption filler is saturated, the flow rate of ammonia water is controlled to be 5BV / h, the temperature is 30°C, and the washing is performed for 2h. After washing, the vacuum degree was controlled to be 2 mbar, the desorption temperature was 100 °C, and the desorption was carried out for 4 h. The adsorption tower can perform adsorption work again, an...

Embodiment 2

[0044] (1) The ethoxyquinoline pretreatment with the p-aminophenethyl ether content of 100 ppm ensures that there is no solid matter in the crude oil and then carries out the adsorption operation;

[0045](2) 5kg of ethoxyquin in the raw material tank is preheated to 30°C through a jacket heat exchanger, and passed through the adsorption column filled with macroporous adsorption resin from bottom to top at a flow rate of 3BV / h through a gear pump, while controlling The temperature of the adsorption process is constant at 80 °C, and the qualified products flow out through the top of the adsorption column and enter the product tank;

[0046] (3) After the adsorption filler is saturated, the flow rate of toluene is controlled to be 5BV / h, the temperature is 30°C, and the washing is performed for 2h. After washing, the vacuum degree was controlled to be 1 mbar, the desorption temperature was 95 °C, and the desorption was carried out for 4 h. The adsorption tower can perform adsor...

Embodiment 3

[0049] (1) The ethoxyquinoline pretreatment with the p-aminophenethyl ether content of 100 ppm ensures that there is no solid matter in the crude oil and then carries out the adsorption operation;

[0050] (2) 5kg of ethoxyquin in the raw material tank is preheated to 30° C. through a jacket heat exchanger, and passed through a packed zeolite molecular sieve adsorption column from bottom to top at a flow rate of 5BV / h by a gear pump, while controlling the adsorption process The temperature is constant at 90 °C, and the qualified products flow out through the top of the adsorption column and enter the product tank;

[0051] (3) After the adsorption filler is saturated, the flow rate of acetone is controlled to be 5BV / h, the temperature is 30°C, and the washing is performed for 2h. After washing, the vacuum degree was controlled to be 1 mbar, the desorption temperature was 95 °C, and the desorption was carried out for 4 h. The adsorption tower can perform adsorption work again,...

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Abstract

The invention belongs to the separation and purification of materials in the field of chemical industry, and specifically relates to an adsorption and impurity removal method for high-purity ethoxyquinoline, an adsorption device designed to ensure the effective separation of product ethoxyquinoline and impurity p-aminophenethyl ether, and obtain high-purity ethoxyquinoline Pure, high value-added product ethoxyquinoline. First, a fixed bed is used to separate the impurity p-aminophenethyl ether. When the adsorbent is saturated, the adsorbent is regenerated by washing with eluent and vacuum high-temperature desorption to complete the entire adsorption-desorption cycle. The invention can effectively separate ethoxyquinoline and p-aminophenetole, greatly improve the purity of the product ethoxyquinoline, and ensure that the concentration of p-aminophenetole in the product is less than 2.5ppm. The method has broad application prospects in the field of ethoxyquinoline production and separation and purification.

Description

technical field [0001] The invention belongs to the separation and purification of materials in the chemical field, and relates to an adsorption and impurity removal process for high-purity ethoxyquinoline. Background technique [0002] Ethoxyquinoline is widely used in feed additives due to its excellent antioxidant properties, but it faces the problem of separation of highly biotoxic p-aminophenethyl ether in the production process of ethoxyquinoline acetone. At present, the concentration of p-aminophenethyl ether contained in ethoxyquin products produced in China cannot meet the new international standards, which restricts the manufacturers of this product from entering the international market. Therefore, it is very important to study the separation technology of trace p-aminophenethyl ether in ethoxyquinoline for export of antioxidant products. [0003] At present, the separation of p-aminophenethyl ether in ethoxyquinoline mainly adopts distillation method. In the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D215/20
CPCC07D215/20
Inventor 陈捷褚伟华丁龙军宋兴福孙淑英金艳
Owner TAIXING RUITAI CHEM
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