Preparation method of slow-release imazapyr particles

A slow-release technology of imazapyr, 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 easy fine processing

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 t

Method used

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  • Preparation method of slow-release imazapyr particles

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] Take 230g of the original drug of metoxamol and dissolve it in 1L of methanol at room temperature to prepare a metoxamol methanol solution with a concentration of 230g / L of metoxamol; take 400g of expanded vermiculite, 100g of zeolite, and 200g of bentonite, and crush it into 20 ~100 mesh mixed carrier powder; add the mixed carrier powder to the methafen methanol solution and stir for 24h in a closed reaction vessel at room temperature to obtain the methafen mixed carrier powder mixture; add the methafen-carrier powder mixture to Add 35g of sodium silicate and continue to stir for 1 hour until the mixture is uniform; the mixture of permethurin-carrier powder after being evenly mixed with sodium silicate is distilled under reduced pressure until there is no obvious liquid residue, and then passed through a 18-24 mesh sieve to obtain Herba tobacco-carrier powder granules; diazuron-carrier powder particles are dried under reduced pressure to remove the orga...

Example Embodiment

[0028] Example 2

[0029] Take 60g of the original drug of dimethoate and dissolve it in 1L of ethanol to prepare a dimethoate ethanol solution with a concentration of 60g / L of dimethoate; take 400g of expanded vermiculite, 20g of zeolite, and 20g of bentonite, and crush it into 100~200 Purpose To mix the carrier powder; add the mixed carrier powder to the ethanol solution of imazapyr, and stir in a closed reaction vessel at room temperature for 10 hours to obtain the imazapyr-mixed carrier powder mixture; add the imazapyr-carrier powder mixture to 10g of hydroxypropyl cellulose, continue to stir for 6 hours until the mixing is uniform; the mixture of permethurin-carrier powder mixed with hydroxypropyl cellulose is subjected to the first vacuum distillation until there is no obvious liquid residue, after 18- A 24-mesh sieve was used to obtain the imazapyr-carrier powder particles; the imazapyr-carrier powder particles were dried under reduced pressure for the second time to remov...

Example Embodiment

[0030] Example 3

[0031] Take 105g of the original drug of dimethoate, add it to 1L of dichloromethane, and dissolve it completely when heated to 38℃ to prepare dichloromethane solution of dimethoate with a concentration of 105g / L; take 400g of expanded vermiculite, zeolite 50g, 100g bentonite, pulverize it into a mixed carrier powder of 200-325 mesh; add the mixed carrier powder to the methanol solution of imazapyr, and stir for 12h in a closed reaction vessel at room temperature to obtain imazapyr-mixed carrier powder mixture ; Add 12g of microcrystalline cellulose to the mixed liquid of imazamox and carrier powder, and continue to stir for 5 hours until the mixture is uniform; perform vacuum distillation of the mixed liquid of imazapyr-carrier powder after mixing with microcrystalline cellulose until there is no obvious The liquid residue is passed through a 18-24 mesh sieve to obtain the imazapyr-carrier powder particles; the imazapyr-carrier powder particles are dried under...

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Abstract

The invention belongs to the field of pesticide, and in particular relates to a preparation method of slow-release imazapyr. The preparation method comprises the following steps: dissolving the imazapyr in the low boiling organic solvent; taking the expanded vermiculite and the zeolite, grinding into 20 to 325 meshes of mixed carrier powder; adding the mixed carrier powder into the imazapyr solution to obtain the mixture solution of the imazapyr and carrier powder; adding binder into the mixture solution of the imazapyr and carrier powder and stirring for 0.1 to 6 hours until the mixing is uniform; and then distilling the mixture solution of the imazapyr and carrier powder under the reduced pressure after being mixed with binder uniformly to obtain solid particles and imazapyr-carrier powder particles; distilling under the reduced pressure to recover organic solvent and obtain the slow-release imazapyr particles. The preparation method has the following advantages: 1, chemical and physical stability is good to avoid a lot of decomposition of the original drug; safety is good, the environmental pollution is easy to process, store and transport; 3, continuous release of imazapyr plays a sustained weed control effect.

Description

technical field [0001] The invention belongs to the field of pesticides, and in particular relates to a preparation method of slow-release imazapyr 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 quickly absorbed by the roots and ...

Claims

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Application Information

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IPC IPC(8): A01N43/50A01N25/12A01N25/08A01P13/00
CPCA01N43/50A01N25/08A01N25/12
Inventor 张一尘赵健王超陆相瑞孙迪圣罗进超
Owner YANCHENG SOUTH CHEM
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