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Production process of herbicide special for paddy

A production process and herbicide technology, applied in herbicides and algicides, chemicals for biological control, applications, etc., can solve problems such as insufficient inhibition effect, and achieve excellent herbicidal performance, long-lasting efficacy, and herbicidal effects. good effect

Inactive Publication Date: 2016-11-23
曹正祥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing herbicides have a certain inhibitory effect on weeds, the inhibitory effect is not obvious enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of production technology of special herbicide for rice, it is characterized in that, its processing step is as follows:

[0019] (1) Material selection, according to the percentage by weight, select respectively 45% of fenthiazide, 5% of sodium nitrate, 5% of methyl isopropyl ketone, 5% of bispyribac, and 40% of fenthiazone as raw materials, mix stand-by;

[0020] (2) Crushing, the mixed raw materials are crushed and ground, and sieved through a 150-mesh sieve;

[0021] (3) Reaction, add the raw materials sieved in step (2) into the reaction vessel, add a mixed catalyst, and pass in CO 2 , to control CO 2 The pressure is 4MPa, the reaction temperature is 135°C, and stirred for 100min until the raw materials are completely dissolved;

[0022] (4) Modification, mix tetrabutylammonium bromide and triethylbenzylammonium chloride at a mass ratio of 2:1, fill with water and stir to obtain a modifier, and put it into the mixing of step (3) liquid, stir well.

[002...

Embodiment 2

[0026] A kind of production technology of special herbicide for rice, it is characterized in that, its processing step is as follows:

[0027] (1) Material selection, according to the percentage by weight, select respectively 45% of fenthiazide, 5% of sodium nitrate, 5% of methyl isopropyl ketone, 5% of bispyribac, and 40% of fenthiazone as raw materials, mix stand-by;

[0028] (2) Crushing, the mixed raw materials are crushed and ground, and sieved through a 150-200 mesh sieve;

[0029] (3) Reaction, add the raw materials sieved in step (2) into the reaction vessel, add a mixed catalyst, and pass in CO 2 , to control CO 2 The pressure is 6MPa, the reaction temperature is 145°C, and stirred for 50min until the raw materials are completely dissolved;

[0030] (4) Modification, mix tetrabutylammonium bromide and triethylbenzylammonium chloride at a mass ratio of 2:1, fill with water and stir to obtain a modifier, and put it into the mixing of step (3) liquid, stir well.

[...

Embodiment 3

[0034] A kind of production technology of special herbicide for rice, it is characterized in that, its processing step is as follows:

[0035] (1) Material selection, according to the percentage by weight, select respectively 45% of fenthiazide, 5% of sodium nitrate, 5% of methyl isopropyl ketone, 5% of bispyribac, and 40% of fenthiazone as raw materials, mix stand-by;

[0036] (2) Crushing, the mixed raw materials are crushed and ground, and sieved through a 180-mesh sieve;

[0037] (3) Reaction, add the raw materials sieved in step (2) into the reaction vessel, add a mixed catalyst, and pass in CO 2 , to control CO 2 The pressure is 5MPa, the reaction temperature is 140°C, and stirred for 75min until the raw materials are completely dissolved;

[0038] (4) Modification, mix tetrabutylammonium bromide and triethylbenzylammonium chloride at a mass ratio of 2:1, fill with water and stir to obtain a modifier, and put it into the mixing of step (3) liquid, stir well.

[0039...

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Abstract

The invention discloses a production process of a special herbicide for rice. The process steps are as follows: (1) selecting materials, according to the weight percentage, respectively selecting 45% of mefenamide, 5% of sodium nitrate, and methyl isopropyl ketone 5%, bispyribac 5%, fenthiazone 40% as raw materials, mixed for later use; (2) crushed, the mixed raw materials were crushed and ground, and sieved through a 150-200 mesh sieve; (3) reaction , put the sieved raw materials in step (2) into the reaction vessel, add the mixed catalyst, and pass in CO 2 , to control CO 2 The pressure is 4-6MPa, the reaction temperature is 135-145°C, and stirred for 50-100min until the raw materials are completely dissolved; (4) modification, tetrabutylammonium bromide and triethylbenzylammonium chloride are Mix 2:1, fill with water and stir to prepare the modifier, put it into the mixed liquid in step (3), and stir evenly. The herbicide of the invention has good weeding effect, wide application range, high production efficiency, stable herbicide effect, long-lasting drug effect, reasonable and simple process, and is suitable for popularization and use.

Description

technical field [0001] The invention relates to a production process of chemical pesticides, in particular to a production process of a special herbicide for rice. Background technique [0002] At present, pesticides have been widely used in the field of agricultural production. With the development of agriculture, especially the emergence of large-scale contracted farmland, the demand for pesticides is increasing day by day. According to the survey, there are more than 30,000 species of weeds in the world, of which about 1,800 species can cause serious economic losses. It is estimated that crops around the world lose an average of 12% of their potential yield each year due to weeds. Human beings fight against weeds, the oldest method is artificial weeding or weeding, these two methods not only consume a lot of labor and energy, but also the effect is not ideal. The chemical weeding method is convenient, effective and economical, and has become an indispensable part of mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/78A01N25/30A01N25/22A01N25/02A01P13/00
CPCA01N43/78A01N25/02A01N25/22A01N25/30
Inventor 曹正祥
Owner 曹正祥
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