Trichlorfon continuous production method and production device for method

A production method and production device technology, applied in the field of trichlorfon continuous production and the production device used for it, can solve the problems of poor production stability and safety, poor product quality, low production efficiency, etc., and achieve stable product quality , Quick effect, less investment effect

Pending Publication Date: 2021-01-26
漯河市新旺化工有限公司
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Problems solved by technology

[0005] The invention provides a preparation method and production equipment for the continuous production of trichlorfon, which effectively solves the problems of low production efficiency, poor production stability and safety, poor product quality and low yield in the existing production method

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  • Trichlorfon continuous production method and production device for method

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Embodiment Construction

[0026] The preparation method and production device for the continuous production of trichlorfon of the present invention will be described in detail below through specific embodiments.

[0027] Such as figure 1 As shown, first put about 900kg of 90% trichlorfon into the first-level synthesis kettle as the reaction mother liquid of the synthesis kettle, and then drop two kinds of chloral and dimethyl phosphite at the same time through the flow meter at a ratio of 1:0.6. The raw materials are sent to the first-level synthesis tank for reaction, and the reaction temperature is controlled at 75-85°C. The reaction materials in the first-level synthesis kettle flow out from the bottom liquid outlet 1, through the liquid outlet pipe 15 to the bottom liquid inlet 10 of the second-level synthesis kettle, and overflow into the second-level synthesis kettle through the n-type pipeline to continue the reaction. 75°C. The reaction product in the second-stage synthesis kettle overflows i...

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Abstract

The invention provides a preparation method and production equipment for continuous production of trichlorfon, and effectively solves the problems of low production efficiency, poor production stability and safety, poor product quality and low yield of the existing production method. The continuous production method of trichlorfon comprises the following two stages of synthesis reactions for continuously preparing trichlorfon: (1) adding trichlorfon into a I-stage synthesis kettle as a synthesis kettle reaction mother liquor, then simultaneously dropwise adding trichloroacetaldehyde and dimethyl phosphite for reaction, and controlling the reaction temperature to be 75-85 DEG C; (2) enabling the reaction materials to enter a second-stage synthesis kettle from the first-stage synthesis kettle to continuously react, and controlling the reaction temperature to be 75 DEG C; and the product trichlorfon is obtained after the reaction in the I-stage synthesis kettle and the II-stage synthesiskettle.

Description

technical field [0001] The invention relates to a continuous production method of trichlorfon and a production device used in the production method. Background technique [0002] Trichlorfon, chemical name: O, O-dimethyl-(2,2,2-trichloro-1-hydroxyethyl) phosphonate. It is an organophosphorus pesticide that is widely used in agricultural production and requires a large amount. The pure product is a white solid with a melting point of 83-84°C. It is soluble in water and organic solvents and has relatively stable properties. However, it will be hydrolyzed into dichlorvos when it meets alkali. [0003] There are mainly the following ways to produce trichlorfon in industry: ① two-step method, first use methanol and phosphorus trichloride to react to produce dimethyl phosphorous acid, and then rearrange and condense with chloral to form trichlorfon medicine. ②One-step method, the raw materials are added into the reactor at the same time in an appropriate proportion, the by-prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/40
CPCC07F9/4006
Inventor 张广辉朱晓斌孟庆红罗朝林张彦伟
Owner 漯河市新旺化工有限公司
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