Organic bentonite pesticide sustained-release granular formulation and preparation method thereof

A slow-release granule, bentonite technology, applied in the fields of botanical equipment and methods, insecticides, biocides, etc., can solve problems such as complex processes, achieve the effects of good environmental compatibility, reduce contact, and improve stability

Inactive Publication Date: 2012-07-18
GAUNGXI TIANYUAN BIOCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method not only has the disadvantage of complex process, but also we found that when using this process to prepare phoxim sustained-release granules, when using this process to load pesticides, if the organic solvent is removed by filtration, the amount of pesticides on the organobentonite obtained after washing The content is almost negligible, indicating that the active ingredient of the pesticide does not enter the interlayer domain of bentonite, but adheres to the surface of organic bentonite. The granules prepared by this patent mainly use alkyl quaternary ammonium salts to enhance the hydrophobicity of the surface of bentonite and delay Dissolution of Xicaojing in water

Method used

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  • Organic bentonite pesticide sustained-release granular formulation and preparation method thereof
  • Organic bentonite pesticide sustained-release granular formulation and preparation method thereof
  • Organic bentonite pesticide sustained-release granular formulation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: Preparation of 10% phoxim granules by dodecyltrimethylammonium chloride modified bentonite with an amount of 0.5CEC

[0040] Step 1: Add 1 part of bentonite with a cation exchange capacity of 82mmol / 100g to 50 parts of water, fully disperse to make a bentonite suspension, add 0.108 parts of dodecyltrimethylammonium chloride (0.5CEC), and heat up to 60°C Continue to stir for 4 hours, add 50 parts of water to the organic bentonite obtained after suction filtration, and stir at 30° C. to prepare an organic bentonite suspension.

[0041] Step 2: 1 part of phoxim was dissolved in 1 part of methanol, and added dropwise to the above organobentonite suspension, stirred at 30°C for 4 hours, suction filtered and washed with water to obtain drug-loaded organobentonite. Gained drug-loaded organobentonite was sampled, dried, and its moisture content was measured by weighing method to be 23.9%; another drug-loaded organobentonite sample was extracted by methanol and its ph...

Embodiment 2

[0043] Embodiment 2: 10% phoxim granules are prepared by modifying bentonite with 1.0CEC dosage of dodecyltrimethylammonium chloride

[0044] Step 1: Add 1 part of bentonite with a cation exchange capacity of 82mmol / 100g to 50 parts of water, fully disperse to form a bentonite suspension, add 0.216 parts of dodecyltrimethylammonium chloride (1.0CEC), and heat up to 60°C Continue to stir for 4 hours, add 50 parts of water to the organic bentonite obtained after suction filtration, and stir at 30° C. to prepare an organic bentonite suspension.

[0045] Step 2: 1 part of phoxim was dissolved in 1 part of methanol, and added dropwise to the above organobentonite suspension, stirred at 30°C for 4 hours, suction filtered and washed with water to obtain drug-loaded organobentonite. Gained drug-loaded organobentonite was sampled, dried, and its moisture content was determined by weighing method to be 17.1%; another drug-loaded organobentonite sample was extracted with methanol and its...

Embodiment 3

[0047] Embodiment 3: 10% phoxim granule prepared by dodecyltrimethylammonium chloride modified bentonite with 1.5CEC dosage

[0048] Step 1: Add 1 part of bentonite with a cation exchange capacity of 82mmol / 100g to 50 parts of water, fully disperse to make a bentonite suspension, add 0.324 parts of dodecyltrimethylammonium chloride (1.5CEC), and heat up to 60°C Continue to stir for 4 hours, add 50 parts of water to the organic bentonite obtained after suction filtration, and stir at 30° C. to prepare an organic bentonite suspension.

[0049] Step 2: 1 part of phoxim was dissolved in 1 part of methanol, and added dropwise to the above organobentonite suspension, stirred at 30°C for 4 hours, suction filtered and washed with water to obtain drug-loaded organobentonite. Gained drug-loaded organobentonite was sampled, dried, and its moisture content was determined by weighing method to be 15.6%; another drug-loaded organobentonite sample was extracted by methanol and its phoxim con...

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Abstract

The invention relates to a sustained-release granular formulation for preventing and treating crop diseases and insect pests and a preparation method thereof. The pesticide sustained-release granular formulation comprises bentonite, an organic modifier, pesticide active ingredients, an inert filler and a binding agent, and is prepared by the preparation method comprising the steps of: (1) with the bentonite as a basic material, modifying the bentonite by the organic modifier to obtain organic bentonite; (2) loading the pesticide active ingredients on the organic bentonite to prepare medicine-carrying organic bentonite; and (3) mixing the medicine-carrying organic bentonite, the inert filler and the binding agent proportionally, and pelleting to obtain the sustained-release granular formulation. The preparation method of the sustained-release granular formulation, provided by the invention, not only overcomes the defect of low pesticide loading rate of the natural bentonite, but also realizes the controlled release of the pesticide by adjusting a chemical structure and the amount of the modifier, so that the sustained-release granular formulation is coincident with an occurrence rule of the plant diseases and insect pests, and the pesticide sustained-release granular formulation is used safely, reasonably, economically and effectively.

Description

technical field [0001] The invention belongs to the field of agricultural pesticide preparations, and relates to an insecticidal and bactericidal slow-release granule and a preparation method thereof, in particular to an insecticidal and bactericidal slow-release granule with organic bentonite as a carrier and a slow-release material and a preparation method thereof. Background technique [0002] Environmental awareness, resource protection, use cost, and self-safety urge people to develop new varieties of pesticides with high efficiency, low toxicity, and low residues, and to use new technologies to improve the effect of pesticide application and reduce harm. Due to the enhancement of environmental protection awareness, the toxicity and safety regulations of pesticides are more stringent, and it is extremely difficult to successfully synthesize a new pesticide with high efficiency and low toxicity. It is particularly important to maximize the role of old varieties. The con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/12A01N25/08A01N57/14A01N57/16A01P7/04A01P5/00A01P3/00
Inventor 黄子伦李现玲马林陈利标付丽华李卫国
Owner GAUNGXI TIANYUAN BIOCHEM
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