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A kind of method and application of preparing fluroxypyr acetate

A technology of fluroxypyr and fluroxypyr, which is applied in the field of preparation of herbicides, can solve problems such as the undiscovered preparation method of fluroxypyr, and achieve the effect of reducing drift damage

Active Publication Date: 2016-03-30
SHANDONG DEHAO CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Up to now, there are no bibliographical reports on fluroxypyr salts and their preparation methods both at home and abroad

Method used

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  • A kind of method and application of preparing fluroxypyr acetate

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0023] Formulation example 1: 40% fluroxypyr sodium salt wettable powder

[0024] Put 400 grams of fluroxypyr sodium salt, 30 grams of NNO, 50 grams of sodium lignin sulfonate, 20 grams of white carbon black, and 500 grams of kaolin into the mixer in turn, stir for 30 minutes to mix the materials evenly, and then crush them by airflow Machine, the material fineness passes through 325 mesh sieve. Then the materials were mixed and stirred again in the mixer to obtain 40% fluroxypyr sodium salt wettable powder.

preparation Embodiment 2

[0025] Formulation example 2: 60% fluroxypyr potassium saline dispersible granules

[0026] Put 600 grams of fluroxypyr potassium salt, 40 grams of naphthalene sulfonate formaldehyde condensate, 50 grams of calcium lignosulfonate, 20 grams of K12, 20 grams of sodium sulfate, 20 grams of polyethylene glycol, and 250 grams of kaolin into the In the mixer, stir for 30 minutes to mix the materials evenly, and then pass through the jet mill, and the fineness of the materials should pass through a 325 mesh sieve. Add about 100 ml of water and mix it into a wet material. Make 20-mesh granules by wet method, and dry them in a tray in a hot air oven at about 45°C for 2 hours. Fluoxypyr potassium saline dispersible granules.

preparation Embodiment 3

[0027] Formulation example 3: 20% fluroxypyr dimethylamine salt soluble granules

[0028] Put 200 grams of fluroxypyr dimethylamine salt, 20 grams of NNO, 30 grams of calcium lignosulfonate, 40 grams of K12, 10 grams of soluble starch, 350 grams of sodium sulfate, and 350 grams of sodium carbonate into the mixer in turn, and stir Mix the materials evenly for 30 minutes, then pass through the jet mill, and the fineness of the materials will pass through a 325-mesh sieve. Add about 100 ml of water and mix it into a wet material. Make 20-mesh granules by wet method, and dry them in a tray in a hot air oven at about 45°C for 2 hours. Fluroxypyr dimethylamine salt soluble granules.

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PUM

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Abstract

The invention provides a preparation method of fluroxypyr salt or a primary agent thereof. Fluroxypyr and a proper amount of solvent are agitated and mixed, then added with alkali containing metal cation of kalium, natrium and the like, ammonia water or organic alkali (dimethylamine, monoethylamine, diethylamine, isopropylamine, triethylamine and the like) to react, the reaction temperature is controlled, and fluroxypyr kalium salt, natrium salt, ammonium salt or organic ammonium salt crystal or a primary agent thereof is obtained via cooling, crystallization or drying. The invention further provides various kinds of fluroxypyr salt applicable to filed weeding. Compared with fluroxypry ethylhexyl (a frequently-used herbicide in the market), the fluroxypyr salt primary agent and preparation, provided by the invention, can be processed to a high-content preparation, better protects the environment, avoids the use of harmful solvents, and reduces the drift harm of the agent on one hand, and on the other hand, the weeding speed is higher, a wider range of weeds can be weeded, and the weeding is more thorough.

Description

technical field [0001] The invention relates to the preparation of a herbicide used in agriculture and other places that need to control weeds or other plants. Specifically, it relates to a preparation method of a herbicidal active ingredient 4-amino-3.5-dichloro-6-fluoro-pyridine-2-oxyacetic acid (fluroxypyr) salt technical medicine. Background technique [0002] Fluroxypyr, an organic heterocyclic selective systemic conduction post-emergence herbicide, has a wide application period on cereal crops, and can be used in wheat, barley, corn, grapes, orchards, pastures, forest farms, etc. Controls broad-leaved weeds and is ineffective against grassy weeds. [0003] Currently the most widely used is fluroxypyr isooctyl, and its dosage form is still mainly emulsifiable concentrate. Since the emulsifiable concentrate contains a large amount of solvents, it not only easily pollutes the environment, but also causes many inconveniences such as packaging, transportation and storage,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D213/73A01N43/40A01P13/00
CPCA01N43/40C07D213/73
Inventor 王铭田海霞谢翔宇李宏元赵守明赵辉
Owner SHANDONG DEHAO CHEM