Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF2 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of slow-release imazapyr particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Get imazapyr former medicine 230g, be dissolved in 1L methanol under normal temperature, be mixed with imazapyr concentration and be the imazapyr methanol solution of 230g / L; Get expanded vermiculite 400g, zeolite 100g, bentonite 200g, it is pulverized into 20 ~100 meshes of mixed carrier powder; add the mixed carrier powder into the methanol solution of imazapyr, and stir in a closed reaction vessel at room temperature for 24 hours to obtain the mixed solution of imazapyr mixed carrier powder; add the mixed solution of imazapyr-carrier powder Add 35g of sodium silicate, and continue to stir for 1h until the mixture is uniform; the imazapyr-carrier powder mixture mixed with sodium silicate is distilled under reduced pressure until there is no obvious liquid residue, and passed through a 18-24 mesh sieve to obtain imazapyr Caopyr-carrier powder granules; Imazapyr-carrier powder granules are dried under reduced pressure to remove organic solvents until the organic solvent ...

Embodiment 2

[0029] Take 60g of imazapyr original drug, dissolve it in 1L of ethanol, and prepare an imazapyr ethanol solution with an imazapyr concentration of 60g / L; take 400g of expanded vermiculite, 20g of zeolite, and 20g of bentonite, and grind them into 100-200 The purpose is to mix the carrier powder; add the mixed carrier powder to the ethanol solution of imazapyr, stir in a closed reaction vessel at normal temperature for 10 hours, and obtain the mixed liquid of imazapyr-mixed carrier powder; add the mixed liquid of imazapyr-carrier powder 10g of hydroxypropyl cellulose, continue to stir for 6h to mix evenly; carry out the first vacuum distillation of the imazapyr-carrier powder mixture after being evenly mixed with hydroxypropyl cellulose until there is no obvious liquid residue, and after 18- 24-mesh sieve to obtain imazapyr-carrier powder particles; the imazapyr-carrier powder particles were dried under reduced pressure for the second time to remove the organic solvent until th...

Embodiment 3

[0031] Take 105g of imazapyr original drug, add it to 1L of dichloromethane, and dissolve it completely when heated to 38°C, and prepare an imazapyr dichloromethane solution with an imazapyr concentration of 105g / L; take 400g of expanded vermiculite, zeolite 50g, 100g of bentonite, crushed into 200-325 mesh mixed carrier powder; add mixed carrier powder into imazapyr methanol solution, stir in a closed reaction vessel at room temperature for 12h, and obtain imazapyr-mixed carrier powder mixed liquid ; Add 12 g of microcrystalline cellulose to the imazapyr-carrier powder mixed solution, and continue to stir for 5 hours to mix uniformly; carry out vacuum distillation to the imazazapyr-carrier powder mixed solution after being uniformly mixed with the microcrystalline cellulose until no obvious The liquid residue is passed through a 18-24 mesh sieve to obtain imazapyr-carrier powder particles; the imazapyr-carrier powder particles are dried under reduced pressure to remove the org...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com