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Method for preparing ziram

A technology of thiram and zinc oxide, which is applied in the field of pesticides, can solve the problems of high production cost, complex process, high moisture content, etc., and achieve the effects of simple production mechanism, high yield, reduced discharge and treatment

Inactive Publication Date: 2007-03-28
HEBEI GUANLONG AGROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there are defects such as high moisture content, high production cost and complex process in ziram produced by the above-mentioned process
In addition, the yield of thiram zinc produced by the above process is only about 85%

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Below in conjunction with embodiment a kind of preparation method of ziram provided by the present invention is described in further detail:

[0021] First add 805 kilograms of dimethylamine aqueous solution and 290 kilograms of zinc oxide in the reaction tank with a concentration of 40%, and constantly stir during the adding process. While stirring, 155 kilograms of carbon disulfide are intermittently dripped into the reaction tank to carry out Reaction, the reaction time was kept at 2.5 hours. While dripping carbon disulfide, control the reaction temperature of the solution in the reaction tank between 30-35°C, the reaction mechanism is:

[0022] 2(CH 3 ) 2 NH+2CS 2 +ZnO→[(CH 3 ) 2 N-CSS] 2 Zn+H 2 o

[0023] When dimethylamine, zinc oxide and carbon disulfide are fully reacted, the liquid containing unreacted carbon disulfide and water in the reaction tank is discharged, and then the solid produced by the reaction is washed with water, dehydrated by a centrifu...

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PUM

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Abstract

The invention belongs to pesticide technical field, especially relating to a high-performance, low-toxicity Fuklasin preparing method, and its main technical solution comprises: adding dimethylamine and ZnO in a reacting cylinder, adding in CS2 while blending and reacting fully, discharging the liquid from the reacting cylinder, and then water-washing, dewatering and airflow-drying the resultant solid matter to be able to make Fuklasin. And it has advantages of simple producing process and mechanism, low moisture content of Fuklasin, high Fuklasin yield, and low producing cost, and besides, is an environmental-protection process.

Description

technical field [0001] The invention belongs to the technical field of pesticides, and in particular relates to a preparation method of high-efficiency and low-toxicity pesticide ziram. Background technique [0002] Ziram, a low-toxicity broad-spectrum fungicide, is a low-toxicity pesticide, widely used in the prevention and control of vegetables, fruit trees, flowers and grain crops. However, the production process adopted for the production of ziram at present is as follows: firstly, dimethylamine, carbon disulfide and caustic soda are used to react to generate thiocarba, and then the generated thiobam is reacted with zinc sulfate to obtain ziram. Its reaction formula is: [0003] (CH 3 ) 2 NH+CS 2 +NaOH→(CH 3 ) 2 N-CSSNa+H 2 o [0004] 2(CH 3 ) 2 N-CSSNa+ZnSO 4 →[(CH 3 ) 2 N-CSS] 2 Zn+Na 2 so 4 [0005] Utilize the above-mentioned reaction to produce ziram, although the reaction mechanism is simple, in the production process, not only need multiple sets o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C333/16A01N47/26A01P3/00
Inventor 战冰泳
Owner HEBEI GUANLONG AGROCHEM
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