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Continuous production equipment of lambda-cyhalothric acid

A technology of trifluoromonothalamic acid and production equipment, which is applied in the preparation of carboxylate, the preparation of organic compounds, the separation/purification of carboxylic acid compounds, etc., can solve the problems of inconvenient material and effective utilization of heat, insufficient space saving and the like , to save space, reduce production costs and improve production efficiency

Pending Publication Date: 2021-04-16
南京伟鑫生物医药有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the existing continuous production equipment of permethrin can realize the continuous production of permethrin, it is not enough to save space, and it is not convenient for the effective utilization of materials and heat

Method used

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  • Continuous production equipment of lambda-cyhalothric acid
  • Continuous production equipment of lambda-cyhalothric acid
  • Continuous production equipment of lambda-cyhalothric acid

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Embodiment

[0023] see Figure 1 to Figure 4 ,

[0024] A continuous production equipment for trifluoro-permethrin, comprising a material mixing tank 1, a reaction tank 2, a first rectification tower 3, a heat exchanger 4, a loop reactor 5, a buffer tank 6, and a second rectification tower 7. Tubular reactor 8, extraction tank 9,

[0025] The material mixing tank 1 is connected to the reaction tank 2 through a pipeline, the bottom end of the reaction tank 2 is connected to the first rectification tower 3 through a pipeline, and the bottom end of the first rectification tower 3 is connected to the hot liquid inlet of the heat exchanger 4 through a pipeline , the hot liquid outlet of the heat exchanger 4 is connected with the loop reactor 5 through a pipeline, and the outlet of the loop reactor 5 is connected with the first cold liquid inlet of the heat exchanger 4 through a pipeline, and the first cold liquid of the heat exchanger 4 is Liquid outlet is connected with buffer tank 6 throug...

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PUM

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Abstract

The continuous production equipment comprises a material mixing tank (1), a reaction tank (2), a first rectifying tower (3), a heat exchanger (4), a loop reactor (5), a buffer tank (6), a second rectifying tower (7), a tubular reactor (8) and an extraction tank (9). According to the invention, heat exchange is carried out on the hot material discharged from the first rectifying tower and the material discharged from the cold loop reactor, so that the heat in the first rectifying tower is effectively utilized, meanwhile, one heat exchanger is omitted, the production cost is reduced, the space is saved, and the production efficiency is improved. Hot air exhausted from the tops of the two rectifying towers passes through the buffer tank, so that substances in the buffer tank are further preheated, and heat in the whole set of equipment is effectively utilized.

Description

technical field [0001] The invention relates to the technical field of chemical equipment, in particular to a continuous production equipment of trifluoro-permethrin. Background technique [0002] Trifluorochrysanthemum acid, also known as Kungfu acid, has a chemical name of 3-(2-chloro-3,3,3-trifluoro-propen-1-yl)-2,2-dimethylcyclopropanecarboxylic acid. It is an important intermediate of pyrethroids such as kungfuthrin, bifenthrin, tefluthrin and seflumethrin. The structural formula is as follows: [0003] [0004] 3,3-Dimethyl-4,6,6-trichloro-7,7,7-trifluoroheptane was produced by addition reaction of methyl perinetinate and trifluorotrichloroethane as starting materials Ester; and then with potassium tert-butoxide by cyclization reaction to produce cis-trans-3-(2,2-dichloro-3,3,3-trifluoropropyl)-2,2-dimethylcyclocarboxylate Ester; Finally, saponification reaction with potassium hydroxide produces 3-(2-chloro-3,3,3-trifluoro-propen-1-yl)-2,2-dimethylcyclopropanecar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C27/02C07C51/347C07C51/42C07C51/44C07C51/48C07C61/40
Inventor 刘文娟夏阳
Owner 南京伟鑫生物医药有限公司