New process for treating synthesized chlorpyrifos

Abstract

The invention provides a new process for treating synthesized chlorpyrifos. The process comprises the following steps: standing for layering after reaction of chlorpyrifos; taking an oil phase from a lower layer, washing with water at first, and then washing the chlorpyrifos by using alcohol; and performing suction filtration and drying to obtain a white chlorpyrifos crude drug finished product. The process provided by the invention is simple, and by adopting the process, the production of wastewater is greatly reduced, the production cost of the chlorpyrifos is reduced, and the finished product is high in purity, less in impurity and light in color. The market competitiveness of the chlorpyrifos is improved.

Description

technical field [0001] The invention belongs to the technical field of pesticide production, in particular to a treatment process for synthesizing chlorpyrifos. Background technique [0002] The chemical name of chlorpyrifos is O, O-diethyl-O-(3,5,6-trichloro-2-pyridyl) phosphorothioate, the international common name Chlorpri-fos, which was successfully developed by Dow Chemical Company of the United States in 1965 , is one of the most productive pesticides in the world so far, and is an organophosphorus pesticide with high efficiency, broad spectrum, low residue and low drug resistance. It has contact killing, stomach poisoning and fumigation effects, and can effectively control rice, wheat, More than 100 kinds of pests such as borers, leaf rollers, armyworms, scale insects, aphids, leafhoppers and pest mites in corn, cotton, sugar cane, tea, fruit trees, flowers and livestock. Its mechanism of action is that by inhibiting the activity of acetylcholinesterase in pests, a l...

AI Technical Summary

Problems solved by technology

[0009] Traditional processing method, the purity of the finished product chlorpyrifos is not very high, the process is cumbersome, and the color of the finished product is dark

[0010] In China, the aqueous phase method is generally used to synthesize chlorpyrifos, which is not only cumbersome in the synthesis process, but also quite complicated in the subsequent treatment process

A large amount of waste water is produced, which is not conducive to environmental protection, and the treatment of waste water is not a small capital investment, resulting in economic waste

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