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Preparing method of slow-release imazapyr and tebuthiuron composite particles

A technology of composite granules and imazapyr, which is applied in the field of pesticides, can solve the problems of easy penetration into deep soil and groundwater pollution, and achieve the effects of reducing drug damage, low storage and transportation costs, and good chemical and physical stability

Inactive Publication Date: 2017-02-01
YANCHENG SOUTH CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, imazapyr has high water solubility (solubility in water at 25°C is 11.3g / L), and it is easy to penetrate into deep soil when applied in areas with a lot of rain, causing pollution to groundwater.

Method used

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  • Preparing method of slow-release imazapyr and tebuthiuron composite particles
  • Preparing method of slow-release imazapyr and tebuthiuron composite particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take 200g of imazapyr technical substance, dissolve it in 1L of methanol at normal temperature, and prepare imazapyr methanol solution with imazapyr concentration of 200g / L; Mixed methanol solution of imazapyr-buthiuron; take 400g of expanded vermiculite, 100g of zeolite, and 200g of bentonite, and grind them into mixed carrier powder of 20-100 mesh; Stir in a reaction vessel for 24 hours to obtain a mixture of imazapyr-tethhiuron mixed carrier powder; add 35 g of sodium silicate to the mixed solution of imazapyr-tetrathiuron mixed carrier powder, and continue stirring for 1 hour until the mixture is uniform; The imazapyr-tethhiuron mixed carrier powder mixed solution is distilled under reduced pressure until there is no obvious liquid residue, and passed through a 18-24 mesh sieve to obtain the imazapyr-tethhiuron mixed carrier powder particles; the imazapyr-tethhiuron mixed carrier powder particles are dried under reduced pressure Remove the organic solvent until the ...

Embodiment 2

[0031] Get 100g of imazapyr technical substance, add in 1L of dichloromethane, dissolve completely when heated to 38°C, and prepare imazapyr methylene chloride solution with imazapyr concentration of 100g / L; in imazapyr methylene chloride Add 20g of buthiuron original drug into the solution, and after dissolving completely, obtain imazapyr and tetrathhiuron mixed dichloromethane solution; take 400g of expanded vermiculite, 50g of zeolite, and 100g of bentonite, and grind them into 200-325 mesh mixed carrier powder; mix the mixed carrier powder Add imazapyr-tethhiuron mixed dichloromethane solution, stir in a closed reaction vessel at room temperature for 12 hours to obtain imazapyr-tethhiuron mixed carrier powder mixture; add imazapyr-tethhiuron mixed carrier powder mixture 12g, continue to stir for 5h until mixed evenly; carry out vacuum distillation on the imazapyr-tetrathiuron mixed carrier powder mixed liquid mixed with microcrystalline cellulose until there is no obvious l...

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Abstract

The invention belongs to the field of pesticide, and particularly relates to a preparing method of slow-release imazapyr and tebuthiuron composite particles. The preparing method includes the following steps that imazapyr and tebuthiuron are dissolved in low-boiling-point organic solvent; expanded vermiculite and zeolite are taken and smashed into mixed carrier powder of 20-325 mesh; the mixed carrier powder is added into mixed solution to obtain imazapyr and tebuthiuron mixed carrier powder mixed solution; a binding agent is added, and the mixture continues to be stirred to be mixed uniformly; reduced pressure distillation is carried out on the imazapyr and tebuthiuron mixed carrier powder mixed solution obtained after being mixed with the binding agent uniformly, and obtained solid matter is granulated to obtain imazapyr and tebuthiuron mixed powder particles; organic solvent is recovered through reduced pressure distillation to obtain the slow-release imazapyr and tebuthiuron composite particles. The preparing method has the following advantages that chemical and physical stability is high, and mass decomposing of a technical material is avoided; the slow-release imazapyr and tebuthiuron composite particles are high in safety, small in environment pollution and convenient to process, store and transport; imazapyr and tebuthiuron are continuously and uniformly released to have the continuous synergistic effect.

Description

technical field [0001] The invention belongs to the field of pesticides, and in particular relates to a preparation method of sustained-release imazapyr-tetrathiuron composite granules. Background technique [0002] In order to improve the safety of pesticide use and control the adverse effects of pesticides on the ecological environment, new pesticide formulations have developed rapidly in recent years. Compared with traditional pesticide formulations such as emulsifiable concentrates, the new pesticide formulations have the following advantages: 1) good environmental compatibility; 2) high content of active ingredients, small packaging volume, safe and convenient storage and transportation; 3) good formulation stability and strong adaptability of formulations , Applicable to liquid and solid raw materials. [0003] Imazapyr belongs to imidazolinone herbicides, is a side-chain amino acid synthesis inhibitor, and is a new broad-spectrum herbicide; this product can be quickl...

Claims

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Application Information

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IPC IPC(8): A01N47/36A01N43/50A01N25/12A01P13/00
CPCA01N47/36A01N25/12A01N43/50A01N2300/00
Inventor 周文林李有张一尘罗进超朱乐民
Owner YANCHENG SOUTH CHEM
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