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Fentrazamide-containing weeding microemulsion

A technology of tetramide and microemulsion, which is applied in the field of pesticides, can solve the problems affecting the environmental safety of herbicide persistence, phytotoxicity of recommended crops, and poor weeding effect, so as to achieve good drug degradation effect and low residual Less, the effect of improving the control effect

Inactive Publication Date: 2015-11-18
安徽新北卡化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, herbicide residues in the soil affect the persistence of herbicides and the safety of the environment
From the aspect of weed control, herbicides should have a certain residual period. If the residual period is too short, the weeding effect will not be good, but if the residual period is too long, it will cause phytotoxicity to the recommended crops.
However, from an environmental point of view, the shorter the residual period of herbicides, the better. Herbicides are too stable, not easy to degrade, and have a large amount of residues in the environment, which will cause environmental pollution.

Method used

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  • Fentrazamide-containing weeding microemulsion
  • Fentrazamide-containing weeding microemulsion
  • Fentrazamide-containing weeding microemulsion

Examples

Experimental program
Comparison scheme
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preparation example Construction

[0023] Surfactant provided by the invention is octylphenol polyoxyethylene ether sulfonate, and its preparation method comprises:

[0024] The first step, the chlorination of octylphenol polyoxyethylene ether;

[0025] The second step is the sulfonation of octylphenol polyoxyethylene ether after chlorination.

[0026] The first step is further specifically adding octylphenol polyoxyethylene ether (OP-4) and pyridine into the reaction vessel at a molar ratio of 1:1, adding thionyl chloride dropwise under constant temperature water bath conditions, chlorine The molar ratio of sulfoxide to octylphenol polyoxyethylene ether was 1.5:1, stirred and reacted at 70°C to 80°C for 2 hours, and chlorooctylphenol polyoxyethylene ether was synthesized.

[0027] The second step is further specifically adding chlorooctylphenol polyoxyethylene ether to water, the mass ratio of chlorooctylphenol polyoxyethylene ether to water is 1:1.5, and then adding sulfonating agent sodium sulfite (Na 2 SO...

Embodiment 1

[0030] Embodiment 1 octylphenol polyoxyethylene ether sulfonate

[0031] Mix 10 mol of octylphenol polyoxyethylene ether (OP-4) and 10 mol of pyridine into the reaction vessel, add 15 mol of thionyl chloride dropwise in a constant temperature water bath, stir and react at 80°C for 2 hours, and synthesize chlorooctyl Base phenol polyoxyethylene ether, get the obtained 7.5mol chlorooctylphenol polyoxyethylene ether and join in water, the mass ratio of chlorooctylphenol polyoxyethylene ether and water is 1:1.5, then add 5mol sulfonating agent Sodium sulfite (Na 2 SO 3 ), placed in a high-pressure reactor, and reacted at 150°C for 8 hours under vigorous stirring to obtain a light yellow viscous substance. The crude product was dissolved in a mixture of isopropanol and water with a volume ratio of 2:1, and then extracted with petroleum ether , to remove unreacted raw materials and other oil-soluble impurities, separate the lower layer, distill under reduced pressure, and dry in v...

Embodiment 2

[0032] Embodiment 2 Microemulsion 1

[0033] Surfactant 15g prepared by rimsulfuron-methyl 60g, quinazole 30g and 12g tetramazole, embodiment 1, emulsifier 250g sodium dioctyl succinate sulfonate, cosolvent ethanol 150g, Put 40 g of antifreeze glycerol and 30 g of synergist butyristerin into the reaction kettle, stir evenly and completely dissolve, slowly add 800 g of water, continue mixing and stirring for 2 hours, and obtain a microemulsion.

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Abstract

The invention discloses a fentrazamide-containing weeding microemulsion. The microemulsion comprises effective active ingredients, a surfactant, an emulsifier, namely, dioctylsulfosuccinate sodium salt, a cosolvent, namely, ethyl alcohol, water, an anti-freezing agent, namely, glycerin, and a synergist, namely, piperonyl butoxide, wherein the effective active ingredients comprise azimsulfuron, the fentrazamide and imazaquin; the surfactant is octaphenyl polyoxyethyiene sulfonate. The microemulsion has the very good eliminating effect on field weeds and is safe and efficient, the drug degradation effect is good, and few residues exist.

Description

technical field [0001] The invention relates to a herbicidal microemulsion containing tetramethyleneimide, which belongs to the technical field of pesticides. Background technique [0002] With the rapid development of science and technology, chemical weeding, as a modern and practical technology, plays a huge role in weed control. Although the development of chemical weeding technology is not long, but the development speed is relatively fast. With the development of China's agricultural modernization and the gradual transfer of agricultural labor force, cultivation methods tend to be large-scale and intensive, and the demand for pesticides has increased significantly. Among them, the growth rate of herbicides in recent years is much higher than the development level of insecticides and fungicides, accounting for about 1 / 3 of the proportion of pesticide production. [0003] At present, there are many kinds of herbicides, which can be divided into stem and leaf treatment a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N47/38A01N25/30A01N25/04A01P13/00A01N47/36A01N43/50
Inventor 汪长青
Owner 安徽新北卡化学有限公司
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