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Method for preparing solid of glyphosate isopropyl amine salt

A technology of glyphosate isopropylamine salt and glyphosate acid isopropylamine salt is applied in the field of preparation of herbicide solids, which can solve the problems of increased cost of organic solvents, high cost, complicated process, etc., and achieve reduction of drying heat load, Pollution reduction and cost reduction effects

Active Publication Date: 2007-05-09
ZHEJIANG XINAN CHEM INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Chinese patent 96196134.1 discloses a reverse removal of ammonium hydroxide solution and glyphosate acid, which has high energy consumption and low water removal efficiency
The method has fast reaction speed and simple operation, but the introduction of organic solvents increases the cost and increases unsafe factors
[0008] The above-mentioned inventions all provide the method for the dry ammonium glyphosate that can be used to prepare soluble solid preparations, but all exist the deficiencies such as high energy consumption cost is high or complicated process, it can be said that the prior art has not yet reached a satisfactory level. Effect
In addition, glyphosate isopropylamine salt is still an aqueous product, and no literature reports on the solid preparation method of glyphosate isopropylamine salt have been found so far.
And because the nature of production raw material and product is different, according to the production method of above-mentioned preparation ammonium salt former powder, can not obtain the former medicine of isopropylamine salt or can not obtain the former medicine of high-quality isopropylamine salt
For example, because the solubility of isopropylamine salt in water is relatively large, it is difficult to find a conventional organic solvent to extract it therefrom, so the present invention is needed to solve the unresolved problems in the prior art, and to achieve the above-mentioned invention or known technology unfulfilled needs

Method used

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  • Method for preparing solid of glyphosate isopropyl amine salt
  • Method for preparing solid of glyphosate isopropyl amine salt
  • Method for preparing solid of glyphosate isopropyl amine salt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add water 100g and ammonium sulfate 30g (industrial product) wherein in the reaction that has stirring and cooling device, stir and make ammonium sulfate dissolve completely and form ammonium sulfate solution, then add glyphosate former medicine (content 95%) 50g in the solution, Stir to make it disperse evenly to form a suspension containing glyphosate; 18.2g isopropylamine is gradually added dropwise to the glyphosate suspension under stirring to make it react, a large amount of heat is generated during the reaction, and the temperature of the reaction mixture Gradually rise from 20°C to 75°C, and at the same time, the reaction system gradually changes from a white suspension system to a colorless and transparent solution. After the dropwise addition, it was cooled and gradually precipitated from crystals. When cooled to room temperature, it was separated by filtration to obtain 44.8 g of wet product of glyphosate isopropylamine salt and 153.4 g of mother liquor. Aft...

Embodiment 2

[0030] Add water 100g and sodium chloride 20g (industrial product) in the reaction that has stirring and cooling device, stir and make sodium chloride dissolve completely and form sodium chloride solution, then add the former drug of glyphosate (content 95% ) 50g, stirred to make it dispersed evenly, forming a suspension containing glyphosate; 18.2g isopropylamine was gradually added dropwise to the glyphosate suspension under stirring to make it react, a large amount of heat was produced in the reaction process, and the reaction The temperature of the mixture gradually increased from 20°C to 75°C, and at the same time, the reaction system gradually changed from a white suspension system to a colorless and transparent solution. After the dropwise addition, it was cooled and gradually precipitated from crystals. When cooled to room temperature, it was separated by filtration to obtain 48.8 g of wet product of glyphosate isopropylamine salt and 139.4 g of mother liquor. After d...

Embodiment 3

[0032] Add water 100g and ammonium chloride 30g (industrial product) in the reaction that has stirring and cooling device, stir and make ammonium chloride dissolve completely and form ammonium chloride solution, then add the former drug of glyphosate (content 95% ) 50g, stirred to make it dispersed evenly, forming a suspension containing glyphosate; 18.2g isopropylamine was gradually added dropwise to the glyphosate suspension under stirring to make it react, a large amount of heat was produced in the reaction process, and the reaction The temperature of the mixture gradually increased from 20°C to 65°C, and the reaction system gradually changed from a white suspension system to a colorless and transparent solution. After the dropwise addition, it was cooled and gradually precipitated from crystals. When cooled to room temperature, it was separated by filtration to obtain 38.8 g of wet product of glyphosate isopropylamine salt and 159.4 g of mother liquor. After drying, 36.9 ...

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Abstract

This invention provides a method for preparing solid isopropyl ammonium glyphosate. The method comprises: adding water-soluble salt and appropriate amount of water into a conventional reactor, stirring to completely dissolve the salt and obtain salt solution, adding glyphosate, uniformly dispersing, controlling the temperature, adding isopropylamine, reacting to obtain white crystals of isopropyl ammonium glyphosate, and filtering to obtain isopropyl ammonium glyphosate solid. The method can recycle the mother liquor to reduce water and water-soluble salt usage amounts and maximize precipitated solid amount.

Description

technical field [0001] The invention relates to the preparation of a herbicide solid used in agriculture and other places that need to control weeds or other plants. Specifically, it relates to a method for preparing the solid isopropylamine salt of the herbicidal active ingredient N-phosphorylmethylglycine (glyphosate). Background technique [0002] Glyphosate is a broad-spectrum herbicide, but due to its low solubility in water, in practice, glyphosate is usually formulated as a water-soluble salt. The most widely used soluble salts of glyphosate are mainly isopropylamine salt, ammonium salt, potassium salt and sodium salt. Among them, glyphosate isopropylamine salt is the most effective glyphosate soluble salt and one of the most widely used varieties in the world. [0003] Isopropylamine salt of glyphosate generally refers to the monoisopropylamine salt of glyphosate. Its chemical formula is as follows: [0004] [0005] At present, glyphosate formulations are sti...

Claims

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Application Information

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IPC IPC(8): C07F9/38
Inventor 王伟周曙光秦龙陈丰收姜胜宝李丽娟
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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