Quaternary ammonium-sulfonation microcrystalline cellulose stabilizer and application of stabilizer to cellular herbicides

Abstract

The invention discloses a quaternary ammonium-sulfonation microcrystalline cellulose stabilizer and an application of the stabilizer to cellular herbicides. A preparation method of the quaternary ammonium-sulfonation microcrystalline cellulose stabilizer includes the steps: (1) performing alkali treatment on microcrystalline cellulose; (2) performing reaction on the microcrystalline cellulose after alkali treatment and 3-chlorine-2-hydroxypropyl trimethyl ammonium chloride to obtain quaternization microcrystalline cellulose; (3) performing reaction on the acquired quaternization microcrystalline cellulose, ceric ammonium nitrate and sulfonation reagents under protection of nitrogen to obtain the quaternary ammonium-sulfonation microcrystalline cellulose stabilizer. Compared with the priorart, the quaternary ammonium-sulfonation microcrystalline cellulose stabilizer is applied to the cellular herbicides, and the prepared cellular herbicides have the advantages of efficient and broad-spectrum weeding performance, good dispersing performance and suspension property and efficient and rapid disintegration. The quaternary ammonium-sulfonation microcrystalline cellulose stabilizer, emulsifying agents and carriers are scientifically matched, disintegration speed, dispersing performance and suspension stability are improved, and weeding effects are greatly improved.

Description

technical field

[0001] The invention relates to a quaternary ammonium-sulfonated microcrystalline cellulose stabilizer and its application in cell element herbicides. Background technique

[0002] Compared with insecticides and fungicides, herbicides have higher requirements for the application technology. Improper use of insecticides and fungicides may only affect the control effect. The improper use of herbicides is related to the safety of crop growth.

[0003] The discovery and large-scale application of herbicides is one of the most important symbols of the agricultural green revolution that occurred in the 20th century. It has greatly changed the mode of agricultural labor production, promoted the modernization of agriculture, and made great contributions to ensuring the safety of global food production. . So far, more than 30 major categories, more than 20 targets, and about 400-500 chemical herbicide varieties have been developed in the world. Weed chemical contro...

Examples

Embodiment 1

[0054] A highly efficient and rapidly disintegrating cellular herbicide is prepared from the following raw materials in parts by weight:

[0055] 55 parts of herbicide, 13 parts of wetting agent, 5 parts of disintegrant, 7 parts of quaternary ammonium-sulfonated microcrystalline cellulose stabilizer, 40 parts of carrier, 450 parts of emulsifier aqueous solution with a mass fraction of 0.8%, binder 5 servings.

[0056] The herbicide is alachlor. The wetting agent is sodium lauryl sulfate. The disintegrant is a mixture of urea and sodium chloride in a mass ratio of 1:1. The binder is a mixture of maltodextrin and xanthan gum in a mass ratio of 1:3.

[0057] The preparation method of the quaternary ammonium-sulfonated microcrystalline cellulose stabilizer is as follows: Weigh 12 g of microcrystalline cellulose, add 300 mL of NaOH aqueous solution with a mass concentration of 0.5%, heat up to 95 ° C, keep at 95 ° C for 60 min, cool After reaching 30°C, filter with suction, add...

Embodiment 2

[0064] Compared with Example 1, the only difference is that in this Example 2, the preparation method of the quaternary ammonium-sulfonated microcrystalline cellulose stabilizer is as follows: Weigh 12 g of microcrystalline cellulose, add 300 mL of In NaOH aqueous solution, heat up to 95°C, keep warm at 95°C for 60min, cool to 30°C and filter with suction, add the filter cake to 300mL NaOH aqueous solution with a mass concentration of 10%, let it stand at 25°C for 150min, and suction filter, the filter cake Dry at 30°C to constant weight to obtain alkali-treated microcrystalline cellulose. Take 8.0 g of alkali-treated microcrystalline cellulose, add it to 200 mL of acetone, add 10 mL of NaOH aqueous solution with a mass concentration of 10% at a rate of 1 mL / min at 25 ° C and 200 rpm under magnetic stirring, and then add 16 g of 3-chloro- 2-Hydroxypropyltrimethylammonium chloride, heat up to 45°C, react at 45°C for 3 hours, then adjust the pH value to 7.0 with 1mol / L hydrochlo...

Embodiment 3

[0066]Compared with Example 1, the only difference is that in this Example 3, the preparation method of the quaternary ammonium-sulfonated microcrystalline cellulose stabilizer is as follows: Weigh 12 g of microcrystalline cellulose, add 300 mL of In NaOH aqueous solution, heat up to 95°C, keep warm at 95°C for 60min, cool to 30°C and filter with suction, add the filter cake to 300mL NaOH aqueous solution with a mass concentration of 10%, let it stand at 25°C for 150min, and suction filter, the filter cake Dry at 30°C to constant weight to obtain alkali-treated microcrystalline cellulose. Take 8.0 g of alkali-treated microcrystalline cellulose, add it to 200 mL of acetone, add 10 mL of NaOH aqueous solution with a mass concentration of 10% at a rate of 1 mL / min at 25 ° C and 200 rpm under magnetic stirring, and then add 16 g of 3-chloro- 2-Hydroxypropyltrimethylammonium chloride, heat up to 45°C, react at 45°C for 3 hours, then adjust the pH value to 7.0 with 1mol / L hydrochlor...

technical field

[0001] The invention relates to a quaternary ammonium-sulfonated microcrystalline cellulose stabilizer and its application in cell element herbicides. Background technique

[0002] Compared with insecticides and fungicides, herbicides have higher requirements for the application technology. Improper use of insecticides and fungicides may only affect the control effect. The improper use of herbicides is related to the safety of crop growth.

[0003] The discovery and large-scale application of herbicides is one of the most important symbols of the agricultural green revolution that occurred in the 20th century. It has greatly changed the mode of agricultural labor production, promoted the modernization of agriculture, and made great contributions to ensuring the safety of global food production. . So far, more than 30 major categories, more than 20 targets, and about 400-500 chemical herbicide varieties have been developed in the world. Weed chemical contro...

Examples

Embodiment 1

[0054] A highly efficient and rapidly disintegrating cellular herbicide is prepared from the following raw materials in parts by weight:

[0055] 55 parts of herbicide, 13 parts of wetting agent, 5 parts of disintegrant, 7 parts of quaternary ammonium-sulfonated microcrystalline cellulose stabilizer, 40 parts of carrier, 450 parts of emulsifier aqueous solution with a mass fraction of 0.8%, binder 5 servings.

[0056] The herbicide is alachlor. The wetting agent is sodium lauryl sulfate. The disintegrant is a mixture of urea and sodium chloride in a mass ratio of 1:1. The binder is a mixture of maltodextrin and xanthan gum in a mass ratio of 1:3.

[0057] The preparation method of the quaternary ammonium-sulfonated microcrystalline cellulose stabilizer is as follows: Weigh 12 g of microcrystalline cellulose, add 300 mL of NaOH aqueous solution with a mass concentration of 0.5%, heat up to 95 ° C, keep at 95 ° C for 60 min, cool After reaching 30°C, filter with suction, add...

Embodiment 2

[0064] Compared with Example 1, the only difference is that in this Example 2, the preparation method of the quaternary ammonium-sulfonated microcrystalline cellulose stabilizer is as follows: Weigh 12 g of microcrystalline cellulose, add 300 mL of In NaOH aqueous solution, heat up to 95°C, keep warm at 95°C for 60min, cool to 30°C and filter with suction, add the filter cake to 300mL NaOH aqueous solution with a mass concentration of 10%, let it stand at 25°C for 150min, and suction filter, the filter cake Dry at 30°C to constant weight to obtain alkali-treated microcrystalline cellulose. Take 8.0 g of alkali-treated microcrystalline cellulose, add it to 200 mL of acetone, add 10 mL of NaOH aqueous solution with a mass concentration of 10% at a rate of 1 mL / min at 25 ° C and 200 rpm under magnetic stirring, and then add 16 g of 3-chloro- 2-Hydroxypropyltrimethylammonium chloride, heat up to 45°C, react at 45°C for 3 hours, then adjust the pH value to 7.0 with 1mol / L hydrochlo...

Embodiment 3

[0066]Compared with Example 1, the only difference is that in this Example 3, the preparation method of the quaternary ammonium-sulfonated microcrystalline cellulose stabilizer is as follows: Weigh 12 g of microcrystalline cellulose, add 300 mL of In NaOH aqueous solution, heat up to 95°C, keep warm at 95°C for 60min, cool to 30°C and filter with suction, add the filter cake to 300mL NaOH aqueous solution with a mass concentration of 10%, let it stand at 25°C for 150min, and suction filter, the filter cake Dry at 30°C to constant weight to obtain alkali-treated microcrystalline cellulose. Take 8.0 g of alkali-treated microcrystalline cellulose, add it to 200 mL of acetone, add 10 mL of NaOH aqueous solution with a mass concentration of 10% at a rate of 1 mL / min at 25 ° C and 200 rpm under magnetic stirring, and then add 16 g of 3-chloro- 2-Hydroxypropyltrimethylammonium chloride, heat up to 45°C, react at 45°C for 3 hours, then adjust the pH value to 7.0 with 1mol / L hydrochlor...

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