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Method for extracting high-purity ethoxyquin by using multi-stage molecular distillation technology

A technology of ethoxyquinoline and molecular distillation, which is applied in the field of chemical industry and can solve the problems that separation technology is rarely reported.

Active Publication Date: 2019-04-02
TAIXING RUITAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on the separation technology of trace p-aminophenethyl ether in ethoxyquinoline

Method used

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  • Method for extracting high-purity ethoxyquin by using multi-stage molecular distillation technology
  • Method for extracting high-purity ethoxyquin by using multi-stage molecular distillation technology
  • Method for extracting high-purity ethoxyquin by using multi-stage molecular distillation technology

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Experimental program
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Effect test

Embodiment 1

[0032] like image 3 As shown, the multi-stage molecular distillation extraction process flow is as follows: the crude ethoxyquinoline is filtered to remove particulate matter, and the obtained filtrate is transported to the primary molecular distillation raw material storage tank through a gear pump. The gear pump quantitatively transports 500mL of raw materials to the primary feeding tank. The raw materials are scraped on the inner wall of the distiller, evaporated, and condensed. The resulting heavy components enter the primary storage tank, and the light components are used as raw materials for secondary separation. By analogy, the raw materials are separated by secondary molecular distillation, the resulting light components enter the secondary storage tank, and the heavy components are used as raw materials for the tertiary separation. The raw materials are separated by three-stage molecular distillation, and the obtained light components are returned to the secondary fe...

Embodiment 2

[0038] like image 3 As shown, the multi-stage molecular distillation extraction process flow is as follows: the crude ethoxyquinoline is filtered to remove particulate matter, and the obtained filtrate is transported to the primary molecular distillation raw material storage tank through a gear pump. The gear pump quantitatively transports 500mL of raw materials to the primary feeding tank. The raw materials are scraped on the inner wall of the distiller, evaporated, and condensed. The resulting heavy components enter the primary storage tank, and the light components are used as raw materials for secondary separation. By analogy, the raw materials are separated by secondary molecular distillation, the resulting light components enter the secondary storage tank, and the heavy components are used as raw materials for the tertiary separation. The raw materials are separated by three-stage molecular distillation, and the obtained light components are returned to the secondary fe...

Embodiment 3

[0044] like image 3 As shown, the multi-stage molecular distillation extraction process flow is as follows: the crude ethoxyquinoline is filtered to remove particulate matter, and the obtained filtrate is transported to the primary molecular distillation raw material storage tank through a gear pump. The gear pump quantitatively transports 500mL of raw materials to the primary feeding tank. The raw materials scrape the film on the inner wall of the distiller, evaporate, and condense. The resulting heavy components enter the primary storage tank, and the light components are used as raw materials for secondary separation. By analogy, the raw materials are separated by secondary molecular distillation, the resulting light components enter the secondary storage tank, and the heavy components are used as raw materials for the tertiary separation. The raw materials are separated by three-stage molecular distillation, and the obtained light components are returned to the secondary ...

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Abstract

The invention relates to a method for extracting high-purity ethoxyquin by using a multi-stage molecular distillation technology, and belongs to the field of deep processing of antioxidants. Accordingto the method, high-boiling-point impurities are removed from an ethoxyquin crude product by using first-stage molecular distillation to obtain a subsequent raw material; the p-phenetidine concentration in the raw material is reduced to 200 ppm by using second-stage molecular distillation; and finally the p-phenetidine concentration is reduced to less than 40 ppm through third-stage molecular distillation so as to meet the requirements of the European Union. According to the present invention, with the method, ethoxyquin and p-phenetidine can be effectively separated, such that the purity ofthe product ethoxyquin can be greatly improved, and the high-purity and high-added value product ethoxyquin can be obtained; and the method has broad application prospects in the field of ethoxyquin production and separation and purification.

Description

technical field [0001] The invention belongs to the separation and purification of materials in the field of chemical industry, and relates to a process for extracting high-purity ethoxyquinoline by using a multistage molecular distillation technology. Background technique [0002] The antioxidant ethoxyquinoline has been used for 60 years since it was put into industrial production by the American Monsanto Company in the 1950s. Due to the long-term technological monopoly, my country only started to produce it in the 1990s. As people's demand for meat, poultry and milk increases year by year, the output of ethoxyquin also increases rapidly. As of 2010, my country's annual output of ethoxyquin has reached 8,000 tons, of which about 40% of the output value is used for export. China's status as the global production capacity center of ethoxyquin has been continuously consolidated, which has brought more development opportunities for domestic ethoxyquin production enterprises. ...

Claims

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Application Information

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IPC IPC(8): C07D215/20
CPCC07D215/20
Inventor 陈捷褚伟华任云华宋兴福金艳唐波王春民
Owner TAIXING RUITAI CHEM
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