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Preparation method of glyphosate polymer

A technology of glyphosate and glyphosate acid, which is applied in the field of glyphosate polymer preparation, can solve the problems of slow-release effect of glyphosate polymer preparation, pesticide loss and decomposition, small effective dose, etc. Play, long-lasting, reduce the frequency of spraying effect

Active Publication Date: 2012-08-08
SHENZHEN NOPOSION AGROCHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to the indoor biological toxicity test, the effective dose of this pesticide is very small, but in actual application, due to repeated spraying, the dosage doubles, coupled with the impact of the environment, the loss and decomposition of the pesticide are serious, which has a great impact on rivers and rivers. Potential pollution of water resources such as lakes and seas
At present, there is no relevant report on the preparation of glyphosate polymers from the perspective of organic synthesis to achieve the sustained release effect

Method used

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  • Preparation method of glyphosate polymer
  • Preparation method of glyphosate polymer
  • Preparation method of glyphosate polymer

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preparation example Construction

[0017] Specifically, the preparation method of the glyphosate polymer in the embodiment of the present invention is that the glyphosate acid-catalyzed polycondensation method includes: mixing glyphosate acid with a catalyst and then adding water to prepare a mixed slurry, the catalyst being selected from phosphoric acid, sulfuric acid , phosphorous acid, polyphosphoric acid, potassium bisulfate, ammonium bisulfate; heating the above-mentioned mixed slurry for polycondensation reaction until the reaction is completed.

[0018] Furthermore, the weight ratio of glyphosate acid to the catalyst in the slurry is 1:0.01-1.5, and the weight ratio of the total amount of glyphosate acid and catalyst to water is 1:0.05-0.5.

[0019] Furthermore, the above-mentioned polycondensation reaction is carried out at a temperature of 70°C to 190°C. During heating, the catalyst is gradually evaporated.

[0020] Furthermore, the above polycondensation reaction time is 0.3-3 hours.

[0021] Furthe...

Embodiment 1

[0032] The obtained glyphosate polymer was prepared into 60% glyphosate lactone water-dispersible granules and common 60% glyphosate water-dispersible granules were subjected to bioassay respectively, list 1-1, 1-2, 1-3 Compare the differences in the persistence and efficacy of the two medicines.

[0033] After harvesting the previous crop of rice, apply medicine 5-7 days before transplanting the latter crop of rice, drain the field water for 2-3 days before using the medicine, spray with 10 kg of water per mu, and then transplant the rice after water retention for 3-5 days. The blank control did not apply pesticides and did not weed. After spraying, the transplanted rice was subjected to conventional cultivation treatment. The growth status of the weeds was visually observed 2 and 5 days after the application of the medicine, and the types and quantities of the weeds in each treatment were observed 15 days, 30 days and 50 days after the rice was transplanted. The calculatio...

Embodiment 2

[0049] The prepared compound is made into 60% glyphosate lactone soluble powder and common 60% glyphosate soluble powder for bioassay respectively, and lists 2-1, 2-2, 2-3 compare the persistence of the two agents and differences in efficacy.

[0050] After harvesting the previous crop of rice, apply medicine 5-7 days before transplanting the latter crop of rice, drain the field water for 2-3 days before using the medicine, spray with 10 kg of water per mu, and then transplant the rice after water retention for 3-5 days. The blank control did not apply pesticides and did not weed. After spraying, the transplanted rice was subjected to conventional cultivation treatment. The growth status of the weeds was visually observed 2 and 5 days after the application of the medicine, and the types and quantities of the weeds in each treatment were observed 15 days, 30 days and 50 days after the rice was transplanted. The calculation and analysis method of drug efficacy is as follows; ...

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Abstract

The invention provides a preparation method of glyphosate polymer, in particular to a N-(Phosphonomethyl)iminodiaceticacid catalytic polycondensation method. The preparation method comprises the following steps of: mixing and conditioning proguanil hydrochloride, sulfuric acid and a catalyst into slurry, wherein the catalyst is a compound selected from sodium bisulfate, potassium bisulfate, ammonium hydrogen sulfate and tripolyphosphate; heating the slurry for carrying out an oxidative decarboxylation reaction until no bubble is generated; and adding one of catalysts and uniformly mix with the slurry after the oxidative decarboxylation reaction and heating the uniformly mixed slurry for carrying out a polycondensation reaction until the reaction is finished. The glyphosate polymer of the invention is used for weeding and has the advantages of high efficiency, durability and slow release effect.

Description

technical field [0001] The invention relates to a preparation method of glyphosate polymer. Background technique [0002] N-phosphonomethylglycine, known as glyphosate in the field of agricultural chemistry, is widely used as a broad-spectrum herbicide. Glyphosate is widely used due to its excellent tolerance and resistance, and is the most widely used herbicide in my country. However, according to the indoor biological toxicity test, the effective dose of this pesticide is very small, but in actual application, due to repeated spraying, the dosage doubles, coupled with the impact of the environment, the loss and decomposition of the pesticide are serious, which has a great impact on rivers and rivers. Water resources such as lakes and seas are potentially polluted. At present, there is no relevant report on the preparation of glyphosate polymer from the perspective of organic synthesis to achieve sustained release effect by using glyphosate technical. Contents of the in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G79/04
Inventor 袁伏中李琛曹明章李广泽曹革杨立平孔建
Owner SHENZHEN NOPOSION AGROCHEM
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