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Lignin-emamectin benzoate conjugate, preparation method, insecticide and application thereof

A technology of lignin and emamectin, which is applied in the field of lignin- emamectin conjugates to achieve the effects of wide adaptability, stable preparation, good resistance to photolysis and antioxidant properties

Pending Publication Date: 2022-04-01
南宁师范大学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, while pesticides eliminate pests and protect crops, they also have a certain negative impact on our lives and the ecological environment

Method used

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  • Lignin-emamectin benzoate conjugate, preparation method, insecticide and application thereof
  • Lignin-emamectin benzoate conjugate, preparation method, insecticide and application thereof
  • Lignin-emamectin benzoate conjugate, preparation method, insecticide and application thereof

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preparation example Construction

[0053] The invention also discloses a preparation method of a lignin-amamectin sulfonate conjugate with anti-photolysis performance, comprising: using lignin as a carrier and coupling the pesticide emamectin sulfonate through chemical bonds to prepare emamectin benzoate-lignosulfonate Acid conjugates or emamectin benzoate-alkaline lignin conjugate pesticides.

[0054] In some of the technical solutions of the present invention, as a preference, in the preparation method, the lignin includes sodium lignosulfonate, alkaline lignin, calcium lignosulfonate and lignin-based derivatization produced lignin derivatives.

[0055]In some of the technical solutions of the present invention, as preferably, the following steps are included:

[0056] Sodium lignosulfonate SL is used as raw material to obtain modified lignosulfonic acid through sulfonation modification. The modified lignosulfonic acid is further converted into lignosulfonyl chloride by reacting with thionyl chloride, and th...

Embodiment 1

[0110] Example 1 Preparation of pesticide emamectin benzoate-lignosulfonic acid conjugate (EB-SL) using sodium lignosulfonate as carrier

[0111] (1) Preparation of lignosulfonic acid

[0112] Dissolve 10-30g of sodium lignosulfonate (SL) in distilled water, slowly add 2-10mL of 30% hydrogen peroxide under ice bath, then heat to 80°C, and stir at this temperature for 2h. Subsequently, 5-15 g of sodium sulfite and 1-6 g of formaldehyde are added to the above mixture, and the pH value is adjusted to 8-10. The resulting solution was continued to be heated to 80-90°C, stirred and reacted at this temperature for 3-6h, and then cooled to room temperature. Add 0.5-2mol / L hydrochloric acid solution dropwise to the cooled solution to promote the precipitation of lignosulfonic acid. The precipitate was washed with alcohol and then filtered, and the modified lignosulfonic acid obtained by filtering was dried at 80° C. to obtain a brown powder product.

[0113] (2) Preparation of ligni...

Embodiment 2

[0117] Example 2 Preparation of pesticide emamectin benzoate-alkaline lignin conjugate (EB-AL) with alkaline lignin as carrier

[0118] (1) Preparation of alkaline lignin acetic acid

[0119] Add 5-20g of basic lignin into 20-100mL of 40% sodium hydroxide aqueous solution, raise the temperature to 80-90°C and stir for 0.5-2h, then add 3-20g of chloroacetic acid, and reflux at 100°C-110°C for 3-6h . After the reaction, cool to room temperature, add absolute ethanol and let it settle overnight, filter with suction, wash the obtained black solid with distilled water, and obtain black solid alkaline lignin acetic acid after drying.

[0120] (2) Preparation of Alkaline Lignin Acetyl Chloride

[0121] Dissolve 1-5g of alkaline lignin acetic acid obtained in (1) in 10-50mL DMF, add SOCl under ice bath 2 2-10mL, rise to room temperature, and then react at room temperature for 2-6h. After the reaction is over, unreacted SOCl is removed under reduced pressure 2 , to obtain lignin ...

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Abstract

The invention discloses a lignin-emamectin benzoate conjugate with photolysis resistance. The lignin-emamectin benzoate conjugate is a compound shown as a formula I or a formula II. The invention further discloses a preparation method of the lignin-emamectin benzoate conjugate with photolysis resistance. Comprising the following steps: by taking lignin as a carrier, coupling lignin with a pesticide emamectin benzoate through a chemical bond to prepare an emamectin benzoate-lignosulfonic acid conjugate or an emamectin benzoate-alkaline lignin conjugate pesticide. The invention also discloses an insecticide, and the insecticide takes the emamectin benzoate-lignin conjugate as a basic insecticidal active component. The invention also discloses an application of the emamectin benzoate-lignin conjugate or the insecticide in the production of insecticidal and pesticide insecticidal preparations. The emamectin benzoate-lignin conjugate provided by the invention has very good photolysis resistance and oxidation resistance and very good insecticidal lasting period, and has the advantages of being green, environmentally friendly and simple in preparation process.

Description

technical field [0001] The invention belongs to the field of pesticide preparations, and relates to a lignin-formamectin emamectin conjugate with anti-photolysis performance, a preparation method, an insecticide and an application thereof. Background technique [0002] Pesticides can be used not only to kill pests and fungi, but also to eliminate other organisms that harm crop growth, so that crops can achieve stable and high yields. However, while pesticides eliminate pests and protect crops, they also have a certain negative impact on our lives and the ecological environment. Therefore, the international community has higher and higher requirements for pesticide preparations with low toxicity, low residue, low risk and high-efficiency utilization. Especially in the process of agricultural production, how to reduce the amount of pesticide application, reduce the residue of pesticides in agricultural products, and protect the ecological environment has become a major concer...

Claims

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Application Information

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IPC IPC(8): C08H7/00A01N43/90A01N25/10A01P7/04
Inventor 黄燕敏崔建国李香荧熊齐鹏崔郭勤陈勇江扬莫启进甘春芳
Owner 南宁师范大学
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