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Glyphosate pesticide active composition and preparation method thereof

A glyphosate and composition technology, which is applied in the field of glyphosate active composition and its preparation, can solve the problems of affecting processing and molding, complicated preparation operation and high energy consumption, and achieves the advantages of saving raw material cost, simple process and reducing consumption. Effect

Inactive Publication Date: 2015-05-20
CHONGQING UNISPLENDOUR CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In summary, the current preparation methods of glyphosate have the disadvantages of cumbersome preparation operations, high energy consumption, low quality of the prepared glyphosate technical, and unsatisfactory yields.
At the same time, the processing fluidity of the existing glyphosate technical is not ideal. When preparing glyphosate soluble granules, soluble powders, and soluble tablets, the preparation property is not good, which affects its processing and molding

Method used

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  • Glyphosate pesticide active composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Add 200KG of the existing glyphosate solid powder and glyphosate technical solid powder with a mass percentage of about 95% prepared according to the glyphosate preparation method disclosed in Chinese patent CN101993455A into hot water at 90°C and continuously stir, It takes about 1-1.5 hours until it is completely dissolved in 3200Kg water. Dissolve 0.6KG glyphosate potassium salt in water, mix and stir the two evenly, cool to 20°C to crystallize for 4 hours, and centrifuge to obtain glyphosate The wet product of the active composition is washed with a small amount of water and dried to obtain the active composition of glyphosate.

[0049] Measure the angle of repose of the glyphosate active composition obtained above: In this test, the injection method (fixed funnel method) is used to measure the angle of repose of the glyphosate sample prepared above. Pour the sample to be tested into the funnel so that it falls gently and evenly into the center of the disc to form a...

Embodiment 2

[0051] Add 800g bisglyphosate (PMIDA) (98.2%, 3.46mol), 1450g water, and 120g activated carbon into the four-necked flask in turn, raise the temperature to 68°C under constant stirring, start to drop 1000g of 27.5% hydrogen peroxide under normal pressure, drop After the addition, keep it warm for 1 hour, cool to 5°C, crystallize for 3 hours, and obtain 816 g of the glyphosate activated carbon mixture, divide the glyphosate activated carbon mixture into eight equal parts, and set aside.

[0052] Add a portion of the glyphosate activated carbon mixture obtained above to 804g of 16.9% glyphosate isopropylamine salt solution or to the corresponding isopropylamine aqueous solution, heat up to 95°C to dissolve, filter while hot, and cool to 20°C to crystallize After 4 hours, the glyphosate wet product was obtained by centrifugation, washed with a small amount of water and then dried to obtain the glyphosate active composition, and the mother liquor was applied to subsequent batches. ...

Embodiment 3

[0058] Add 800g bisglyphosate (PMIDA) (98.3%, 3.46mol), 1450g water, and 120g activated carbon into a four-necked flask in turn, raise the temperature to 68°C under constant stirring, and start to add 980g of 27.5% hydrogen peroxide dropwise under normal pressure, drop After the addition, keep it warm for 1 hour, cool to 5°C, crystallize for 3 hours, and obtain 835 g of the glyphosate activated carbon mixture, divide the glyphosate activated carbon mixture into eight equal parts, and set aside.

[0059] Add a portion of the glyphosate activated carbon mixture obtained above into 716.5g of 18% glyphosate monosodium salt solution, heat up to 95°C to dissolve, filter while hot, cool to 20°C to crystallize for 4 hours, and centrifuge to obtain the glyphosate wet product. Wash with a small amount of water and dry to obtain the glyphosate active composition, and apply the mother liquor to subsequent batches.

[0060] Measured by liquid chromatography and averaged, the white crystall...

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Abstract

The invention provides a glyphosate pesticide active composition. The glyphosate pesticide active composition is prepared from the following components in percentage by mass: not less than 95% of glyphosate, and more than 0 and not greater than 1% of glyphosate salt, wherein the glyphosate salt is any one or some of glyhosate ammonium, glyhosate potassium salt, glyphosate isopropylamine, glyphosate sodium and glyphosate dimethylamine salt. The glyphosate pesticide active composition is high in processing mobility; the injection method is carried out to detect the angle of repose of crystalline particles of the glyphosate pesticide active composition, and theta is not greater than 30 degrees, so that the demand on production of various soluble solid preparations of glyphosate can be met. The preparation method comprises the following steps: synthesizing glyphosate; separating activated carbon; cooling and crystallizing to obtain glyphosate; when the activated carbon is separated, the glyphosate-activated carbon mixture obtained during synthesizing glyphosate is added to a glyphosate salt solution to be heated and dissolved, and then the activated carbon can be filtered and separated during heating; the glyphosate salt solution is 5 to 35%; and the mass ratio of glyphosate-activated carbon mixture to glyphosate salt is (0.8-1.5): 1.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to a glyphosate active composition and a preparation method thereof. Background technique [0002] Glyphosate (N-(phosphonomethyl)-glycine) is also known as: glyphosate, roundup, glyphosate, phosphonic acid. Its structural formula is as follows: [0003] ; [0004] Glyphosate is a high-efficiency, broad-spectrum, low-toxicity, and safe organophosphorus herbicide. It is very effective in preventing perennial deep-rooted weeds and is widely used in agriculture, forestry, and horticulture. Due to the continuous expansion of the global planting area of ​​genetically modified crops, as well as the recovery and modernization of global agriculture, especially in developing countries, the demand for glyphosate has grown rapidly, and it has become the largest and fastest-growing pesticide variety in the world. [0005] As an organic herbicide, glyphosate is generally used in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N57/20A01P13/00C07F9/38
CPCA01N57/20C07F9/38
Inventor 王冬林展亚萍吴传隆丁永良范倩玉郑道敏姚如杰
Owner CHONGQING UNISPLENDOUR CHEM