Chlorothalonil dry suspending agent and preparation method thereof

A technology of dry suspension and chlorothalonil, which is applied in the field of preparation of chlorothalonil dry suspension, can solve the problems of great safety hazards, consumption of non-renewable resources, dust drift, etc., and achieve easy continuous production and easy measurement And packaging, to avoid the effect of dust flying

Active Publication Date: 2011-09-28
MAX RUDONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The emulsifiable concentrate formula contains a large amount of organic solvents. Most of these organic solvents are flammable, explosive, and toxic. Not only are there great safety hazards in the process of production, storage, transportation, and use, but they will also pollute the environment and consume a large amount of of non-renewable resources
Due to its fine particles and low density, wettable powder is easy to cause dust flying during production and use, which is harmful to the environment and human health
Due to its low effective content, the powder is used for direct spraying, which is prone to dust drift, which is harmful to the environment, human beings and crops

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Put 250kg of water into a 500L mixing pot, then put 7.5Kg of Morwet-EFW, 21.25Kg of Morwet-D500, 212.5Kg of chlorothalonil, 2.5Kg of urea, and 6.25Kg of kaolin into the mixing pot in turn. After mixing evenly, it is pulverized by a sand mill until the particle size of the particles is ≥95% in the range of 1-5 microns. Then the suspension slurry is pumped into a pressure spray dryer for granulation, and the spray pressure is controlled at 2-3MPa. After granulation, the material is sieved by a sieving machine to obtain a dry suspension product with a particle size of 150-30 mesh.

Embodiment 2

[0024] Put 550 kilograms of water into the mixing pot of 1000L, then put into the mixing pot successively 12.6Kg of pulling powder BX, 34.2Kg of sodium lignosulfonate, 337.5Kg of chlorothalonil, 22.5Kg of sodium chloride, and 43.2Kg of activated clay. After mixing evenly, it is pulverized by a sand mill until the particle size of the particles is ≥95% in the range of 1-5 microns. Then the suspension slurry is pumped into a pressure spray dryer for granulation, and the spray pressure is controlled at 2-3MPa. After granulation, the material is sieved by a sieving machine to obtain a dry suspension product with a particle size of 150-30 mesh.

Embodiment 3

[0026] Firstly, each substance in the following formula is made into a slurry with a solid content of 30-60% (for example, 30%, 45%, 60%) with water according to the mass percentage, and then wet pulverized with a sand mill to make a suspension slurry. Then spray granulation through a pressure spray dryer. After granulation, the particles are sieved to obtain a dry suspension with a particle size distribution of 150-30 mesh (eg 150 mesh, 230 mesh, 300 mesh). The particle size distribution of the particles after crushing by the sand mill is ≥95% of the particles of 1-5 microns. The spray pressure of the pressure spray dryer is controlled at 2-3 MPa when performing spray granulation.

[0027] formula:

[0028] Chlorothalonil 50~92% (example 50%, 70%, 92%); wetting agent 1~10% (example 1%, 5%, 10%); dispersant 1~15% (example 1%, 7% %, 15%); disintegrant 1~10% (example 1%, 5%, 10%); inert carrier 5~45% (example 5%, 20%, 45%). The sum of the above components is 100%.

[0029] T...

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PUM

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Abstract

The invention discloses a chlorothalonil dry suspending agent and a preparation method thereof. The chlorothalonil dry suspending agent consists of chlorothalonil, a wetting agent, a dispersing agent, a disintegrating agent and an inert carrier. By the chlorothalonil dry suspending agent and the preparation method thereof, the problem that layered precipitates are generated easily after a water suspending agent is stored is solved; the defect of flying dust caused by dry granulation is avoided; and the problem of long disintegrating time of water dispersible granules prepared by an extrusion method in water is solved. Compared with other pelleting processes, the preparation process has the advantage of realizing continuous production easily.

Description

technical field [0001] The invention relates to a preparation method of chlorothalonil dry suspension. Background technique [0002] Pesticides are important materials for agricultural production. The use of pesticides to prevent and control plant diseases, insect pests and weeds has the advantages of quick results, good control effects, wide adaptability and high economic benefits. However, while pesticides ensure a good harvest in agricultural production, they may also cause certain harm to the environment, humans, animals and plants. Some traditional pesticide formulations such as emulsifiable concentrates, wettable powders, powders, etc. have potential hazards to the environment, humans, or animals and plants during production or use. The emulsifiable concentrate formula contains a large amount of organic solvents. Most of these organic solvents are flammable, explosive, and toxic. Not only are there great potential safety hazards in the process of production, storage, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/14A01N37/34A01P3/00
Inventor 马发亮濮文均蔡国平吴建文阳鹏朱斌
Owner MAX RUDONG CHEM
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