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Method for producing medicated fertilizer

A technology of medicinal fertilizers and pesticides, applied in the field of granular medicinal fertilizers and their preparation, can solve the problems of pesticide decomposition, etc., and achieve the effects of reducing pollution, controlling pollution, and reducing the amount of pesticides

Inactive Publication Date: 2010-01-06
GAUNGXI TIANYUAN BIOCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of pesticide decomposition caused during the mixed granulation process of fertilizers and pesticides, and the high-temperature drying process after granulation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The interfacial polymerization process is adopted. Add 300mL of 0.5% polyvinyl alcohol aqueous solution and 6 drops of defoamer to a 500mL plastic bottle. Under high-speed (20000r / min) stirring, add 29.8g malathion former drug, 13g nonanoyl chloride, 2g polymethylene polyphenylisocyanate, then add 20g diethylenetriamine, 10g sodium carbonate and 100mL of distilled water. After adding the materials, stir at a reduced speed for 1 hour, filter, and vacuum-dry to obtain malathion microcapsules with polyamide and polyurea copolymers as capsule skins and a particle diameter of less than 1 mm.

Embodiment 2

[0016] The interfacial polymerization process is adopted. In an open reactor, add 500mL water, which contains 1.0% polyvinyl alcohol protective glue (Vinol 540) and 0.2% fatty alcohol polyoxyethylene ether emulsifier (Tergitol 15-S-20), the temperature of the solution rises to 40°C. In another container, a mixture of 30 g of diquat and 10 g of polymethylene polyphenylisocyanate (PAPI) was added, and the mixture was added to the above-mentioned reaction container, stirred and emulsified at a high speed, and the temperature of the system was raised to 60° C. Stir gently at 50°C for 6.5 hours, stop the reaction, filter, wash 3 times, and then dry at room temperature to obtain diquat microcapsules with a vesicle-skin content of 25%.

Embodiment 3

[0018] The condensed phase separation process is adopted. Disperse oil-soluble malathion in 1% alginate aqueous solution at 40°C with stirring at 500r / min, then rapidly cool down and slow down to 400r / min, and stir to make alginate adsorb and condense on the dispersed malathion. On the surface of the parathion microparticles, the thickness of the seaweed capsule skin was adjusted with ammonium salt, and the capsule skin was solidified with 0.25mol / L calcium chloride under neutral pH conditions to obtain malathion microcapsules with a yield of 90%.

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PUM

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Abstract

The invention provides a method for preparing a medicated fertilizer, which comprises the following steps: preparing pesticide into a microcapsule preparation; adding fertilizer to granulate and dry; and producing the medicated fertilizer. The medicated fertilizer produced by the method not only prevents the loss of effective components of pesticide in the processes of production and storage, improves the damage of chemical substances with high toxicity on ecological environment, prolongs the efficacy duration of the pesticide with same dosage but also screens the flavor and the odor of the pesticide.

Description

technical field [0001] The invention relates to a fertilizer production method, in particular to a granular medicinal fertilizer and a preparation method thereof. Background technique [0002] Medicinal fertilizer has the dual effects of both pesticide and fertilizer. One-time application can play multiple functions such as fertilization, insecticide (or weeding, sterilization, etc.), which not only greatly saves cost and labor, improves efficiency, but also reduces the impact of pesticides and fertilizers on the environment. pollute. However, the mixing and granulation of fertilizers and pesticides, as well as the high-temperature drying process after granulation, easily lead to the decomposition of pesticides. At the same time, if the original pesticide and fertilizer are simply mixed together, the duration of the pesticide will be shorter, and the taste and smell of the pesticide will still be heavy, so it is impossible to achieve low toxicity of the highly toxic pestici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
Inventor 徐博李卫国韦志军唐静谭贤勇
Owner GAUNGXI TIANYUAN BIOCHEM
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