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Recovery technology of methylamino avermectin benzoate amination solvent

A technology of emamectin and ammonium benzoate, which is applied in the new process field of solvent recovery for emamectin benzoate amination, can solve the problem of high cost, difficult separation of azeotropes, High energy consumption and other issues, to achieve the effect of low cost, less equipment investment, and low energy consumption

Active Publication Date: 2013-07-31
HUNAN GOFAR FINE CHEM IND TECH CO LDT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to overcome the shortcoming that rectification method energy consumption is high, cost is high and azeotrope is difficult to separate, a kind of emamectin benzoate amination solvent recovery new technology is provided, in guaranteeing moisture content Under the condition that the methanol content and methanol content are qualified, the amount of wastewater can be reduced, the energy consumption can be reduced, the operation can be simplified, and the cost can be reduced

Method used

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  • Recovery technology of methylamino avermectin benzoate amination solvent

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Experimental program
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Effect test

Embodiment 1

[0019] Add 500mL of amination solvent into the water washing kettle (the content of methylene chloride is 89.8%, and the content of methanol is 10.2%), start stirring, and add 250mL of sodium carbonate washing solution with a mass content of 3%. After stirring for 20 minutes, the layers were separated for 2 hours. The lower organic phase was collected and weighed 449g. The content of dichloromethane in the organic phase detected by gas chromatography was 99.44%, the moisture content was 0.09%, and the methanol content was 0.04%; the upper inorganic aqueous phase was distilled at 85°C for 2 hours to obtain 52.2g condensate, the methanol content in the condensate was detected to be 88%, and the moisture content was 12%. According to the synthesis process of the amination section of emamectin benzoate, the ammonium compound synthesized by reclaiming dichloromethane and industrial grade dichloromethane as an amination solvent is compared, and the aminated compound synthesized by r...

Embodiment 2

[0021] Add 500mL of amination solvent into the water washing kettle (the content of methylene chloride is 89.1%, and the content of methanol is 10.9%), start stirring, and then add 500mL of sodium carbonate washing solution with a mass content of 3%. After stirring for 30 minutes, the layers were separated for 2 hours. The lower organic phase was collected and weighed 446g. The content of dichloromethane in the organic phase was detected by the gas phase as 99.47%, the water content was 0.1%, and the methanol content was 0.02%; the upper inorganic aqueous phase was distilled at 85°C for 3 hours to obtain 54.5 g condensate, after testing, the methanol content in the condensate is 90%, and the moisture content is 10%. According to the synthesis process of the amination section of emamectin benzoate, the ammonium compound synthesized by reclaiming dichloromethane and industrial grade dichloromethane as an amination solvent is compared, and the aminated compound synthesized by rec...

Embodiment 3

[0023] Add 500mL of amination solvent into the washing kettle (with a methylene chloride content of 89.5% and a methanol content of 10.5%), start stirring, and then add 1000mL of sodium carbonate washing solution with a mass content of 3%. After stirring for 30 minutes, the layers were statically separated for 4 hours. The lower organic phase was collected and weighed 447g. The content of dichloromethane in the organic phase was detected by gas phase as 99.44%, the moisture content was 0.07%, and the methanol content was 0.09%; the upper inorganic aqueous phase was distilled at 85°C for 5 hours to obtain 52.5 g condensate, the methanol content in the condensate was detected to be 88.3%, and the moisture content was 11.7%. According to the synthesis process of the amination section of emamectin benzoate, the ammonium compound synthesized by reclaiming dichloromethane and industrial grade dichloromethane as an amination solvent is compared, and the aminated compound synthesized ...

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Abstract

The invention relates to a recovery technology of methylamino avermectin benzoate amination solvent. Sodium carbonate aqueous solution is utilized to separate dichloromethane and methanol in the amination solvent, and contents of water and methanol in separated and purified dichloromethane solvent accord with requirements of methylamino avermectin benzoate amination workshop section on amination solvent quality; and separated dichloromethane solvent can be used indiscriminately in the methylamino avermectin benzoate amination workshop section, and the methanol solution can be used indiscriminately in methylamino avermectin benzoate amination workshop section. The invention not only solves a treatment problem of the amination solvent but also reuses resource, so as to satisfy national energy saving, emission reduction and environmental protection idea.

Description

technical field [0001] The invention belongs to the fields of resource recycling and environmental protection, and in particular relates to a new process for recovering an amination solvent of emamectin benzoate. This process can separate dichloromethane and methanol in the amination solvent, and the content of water and methanol in the separated and purified dichloromethane solvent meets the requirements of the quality of the amination solvent in the amination section of the emamectin benzoate amination section. requirements. Therefore, the dichloromethane solvent after separation can be applied mechanically in the emamectin benzoate amination section, and the methanol solution can be applied mechanically in the emamectin benzoate preparation. The invention not only solves the problem of handling the amination solvent, but also enables the recycling of resources, which conforms to the national concepts of energy saving, emission reduction and environmental protection. Back...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D17/00
Inventor 陈朝辉李国栋张敦河祝红福陈珍俆勇李契沈文胜
Owner HUNAN GOFAR FINE CHEM IND TECH CO LDT
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