Clean production process for wettable powder of pesticide

A wettable powder, production process technology, applied in the direction of insecticides, biocides, fungicides, etc., can solve the problems of bad influence on corporate reputation and image, heavy cleaning equipment, difficult processing, etc., to improve the use effect of products , reduce energy consumption per week, and solve the effect of spillover

Inactive Publication Date: 2017-10-20
无锡华格新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cross-contamination of products can cause phytotoxicity to sensitive crops, applied crops or non-target crops, and may also raise legal issues
Similarly, pollution accidents may also adversely affect the reputation and image of the entire enterprise
In order to prevent cross-contamination, enterprises have to thoroughly clean the equipment, and the cleaning equipment is heavy and produces a large amount of waste water, which is difficult to deal with

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 170

[0025] Example 1 Clean production process of 70% imidacloprid wettable powder

[0026] With 350 kilograms of imidacloprid former medicine (fold one hundred), 25 kilograms of sodium lignin sulfonate, 50 kilograms of fumed white carbon black, 15 kilograms of TERSPERSE 2700 (Hunsman Company), 60 kilograms of kaolin and 500 kilograms of water are mixed and dispersed into particle size For suspensions not larger than 20 microns, after dispersing for 30 minutes, sand mill them with a sand mill to form a suspension with an imidacloprid content of 35%, the suspension particle size D90 not greater than 8 microns, and D50 not greater than 5 microns. Then the suspension is dried by a centrifugal spray dryer, the material flow rate is 8kg / min, the inlet air temperature is 120°C, the inlet air steam pressure is controlled at 0.7-0.8Mpa, and the dryer outlet air temperature is controlled at 85°C. During the process, the linear velocity of the high-speed centrifugal spray disc is controlled ...

Embodiment 2

[0029] Example 2 Clean production process of 50% dimethomorph wettable powder

[0030] Mix 350 kilograms of Dimethomorph former medicine (100 percent), 28 kilograms of alkylnaphthalene sulfonic acid condensation polymer sodium salt, 14 kilograms of fatty alcohol polyoxyethylene ether, 7 kilograms of polyethylene glycol, 301 kilograms of kaolin and 300 kilograms of water Disperse into a suspension with a particle size not greater than 20 microns. After dispersing for 30 minutes, sand mill it with a sand mill to form a suspension with a dimethomorph content of 35%. The particle size of the suspension is D90 not greater than 8 microns and D50 not greater than 5 microns. Then the suspension is dried by a centrifugal spray dryer, the air inlet temperature is 120°C, the material flow rate is 6kg / min, the air inlet steam pressure is controlled at 0.6-0.7Mpa, and the dryer outlet temperature is controlled at 85°C. During the process, the linear velocity of the high-speed centrifugal ...

Embodiment 380

[0033] Example 3 Clean production process of 80% carbendazim wettable powder

[0034] With 400 kilograms of carbendazim former medicine (fold one hundred), 52 kilograms of dispersant GEROPON SC213 (Solvay Company), 10 kilograms of wetting agents Geropon L-WET / P (Solvay Company), 38 kilograms of sodium lignosulfonate kg and 115.4 kg of water are mixed and dispersed into a suspension with a particle size not greater than 20 microns. After dispersing for 30 minutes, sand mill by a sand mill to form a suspension with a carbendazim content of 65%, and the particle size D90 of the suspension is not greater than 8 Micron, D50 not greater than 5 microns. Then the suspension is dried by a centrifugal spray dryer, the material flow rate is 6kg / min, the inlet air temperature is 120°C, the inlet air steam pressure is controlled at 0.7-0.8Mpa, and the dryer outlet air temperature is controlled at 80°C. During the process, the linear velocity of the high-speed centrifugal spray disc is con...

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Abstract

The invention discloses a clean production process for a wettable powder of a pesticide. The clean production process comprises the following steps: (1) subjecting raw materials of the wettable powder, including active components of the pesticide, a dispersant, a wetting agent and a filling material, to pre-dispersion in water so as to form a suspension with a particle size of no more than 20 [mu]m; (2) subjecting the suspension to sand milling with a sand mill so as to obtain a suspension with a particle size D90 of no more than 8 [mu]m and a particle size D50 of no more than 5 [mu]m; and (3) subjecting the suspension to spray drying with a centrifugal spray dryer so as to obtain a wettable powder product.

Description

technical field [0001] The invention belongs to the field of pesticide preparation processing, and in particular relates to a production process of a pesticide solid wettable powder, in particular to a clean production process of a pesticide wettable powder. Background technique [0002] Wettable powder (WP for short) refers to a powder preparation that can be dispersed in water to form a stable suspension. According to statistics, since 1969, the output value of my country's wettable powder has always accounted for about 1 / 4 of the total output value of pesticide formulations, and the output ratio has accounted for 15% to 20%. It is the main formulation variety of pesticide production in my country. [0003] The traditional processing technology of wettable powder is to mix various related materials (solids) uniformly according to a certain proportion and then pulverize them into finished products through a pulverizer, and the suspension rate of the products is above 70%. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/14A01N51/00A01N43/84A01N47/18A01P7/04A01P3/00
CPCA01N25/14A01N43/84A01N47/18A01N51/00
Inventor 杨春王虎王爱英吴磊旻王宇迪李峰
Owner 无锡华格新材料有限公司
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