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Sustained-release phoxim pesticide and preparation method thereof

A technology of phoxim and sustained-release type is applied in the field of sustained-release phoxim pesticides and preparation thereof, and can solve the problems of instability of phoxim, decomposition failure, decomposition of phoxim, and the like, and achieves phoxim/naphthalene The effect of acetic acid intercalation structure is stable, the preparation method is simple and feasible, and the interaction force is strong

Active Publication Date: 2019-12-31
ZIBO VOCATIONAL INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many problems in the use of this pesticide. First, phoxim is unstable, and it is easy to cause decomposition and failure when exposed to strong light, high temperature, too much water, and alkaline substances.
Second, the preparation of phoxim is mainly emulsifiable concentrate, which must be sprayed with water when used. In the presence of light and water, phoxim is easily decomposed, causing the drug to drift and lose, and cannot be applied to the ideal position, affecting the use effect
Third, the organic solvents in phoxim emulsifiable concentrate will pollute the environment
At present, there are no published literature and patents on phoxim intercalated hydrotalcite in China

Method used

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  • Sustained-release phoxim pesticide and preparation method thereof
  • Sustained-release phoxim pesticide and preparation method thereof
  • Sustained-release phoxim pesticide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Weigh 17.8g Zn(NO 3 ) 2 ﹒ 6H 2 O, 11.3g Al(NO 3 ) 3 ﹒ 9H 2 O dissolved in 100ml to remove CO 2 Mixed salt solution was prepared with water, another 5.6g NaOH was dissolved in 50ml to remove CO 2 Prepare alkaline solution in water, N at room temperature 2 Protection Use the double-drop method to add the salt solution and the alkali solution into the four-neck flask, and stir vigorously. Adjust the pH value to 7 with 0.1mol / L NaOH solution. The resulting slurry was crystallized at 60°C for 72 hours, and the product was placed in a centrifuge, centrifuged at a speed of 2500 rpm for 5 minutes, and then used to remove CO 2 Wash with water until neutral; take out the sample and dry it at 50°C for 48 hours for characterization, and get ZnAl-NO 3 -LDHs, whose Zn 2+ / Al 3+ =2.

[0036] (2) 10.9g sodium salt of naphthaleneacetic acid [C 12 h 9 o 2 Na] solid dissolved in 100mL to remove CO 2 After the deionized water was transferred into the four-necked bottl...

Embodiment 2

[0041] (1) Weigh 15.4g Mg(NO 3 ) 2 ﹒ 6H 2 O, 11.3g Al(NO 3 ) 3 ﹒ 9H 2 O dissolved in 100ml to remove CO 2 Mixed salt solution was prepared with water, another 2.0g NaOH was dissolved in 50ml to remove CO 2 Prepare alkaline solution in water, N at room temperature 2 The salt solution and the alkali solution were added into the four-neck flask by the double-drop method, and the pH value was adjusted to 10 with 5mol / L NaOH solution after the dripping. Centrifuge at rpm for 3 min, then remove CO 2 Wash with water until neutral; take out a small amount of samples and dry them at 90°C for 20 hours for characterization to obtain MgAl-NO 3 -LDHs, its Mg 2+ / Al 3+ =2.

[0042] (2) 10.9g sodium salt of naphthaleneacetic acid [C 12 h 9 o 2 Na] solid dissolved in 100mL to remove CO 2 After the deionized water was transferred to the four-necked bottle, then add the 20g hydrotalcite precursor MgAl-NO 3 -LDHs, N 2 Protected and heated to 70°C, reacted for 12h under stirrin...

Embodiment 3

[0047] (1) Weigh 17.4g Ni(NO 3 ) 2 ﹒ 6H 2 O, 11.3g Al(NO 3 ) 3 ﹒ 9H 2 O dissolved in 100ml to remove CO 2 Mixed salt solution was prepared with water, another 5.6g NaOH was dissolved in 50ml to remove CO 2 Prepare alkaline solution in water, N at room temperature 2 Protection Use the double-drop method to add the salt solution and the alkali solution into the four-neck flask, and stir vigorously. Adjust the pH value to 7 with 3.0mol / L NaOH solution. The resulting slurry was crystallized at 80°C for 30 h, and the product was placed in a centrifuge, centrifuged at a speed of 3000 rpm for 4 min, and then used to remove CO 2 Wash with water until neutral; take out the sample and dry it at 50°C for 48 hours for characterization, and obtain NiAl-NO 3 -LDHs, whose Ni 2+ / Al 3+ =2.

[0048] (2) 10.9g sodium salt of naphthaleneacetic acid [C 12 h 9 o 2 Na] solid dissolved in 100mL to remove CO 2 The deionized water was transferred into a four-neck bottle, and then 20g o...

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Abstract

The invention relates to the field of organic-inorganic composite materials, in particular to a sustained-release phoxim pesticide and a preparation method thereof. The method includes: low-release phoxim pesticide and a preparation method thereof. The preparation method comprises the following steps: intercalating a naphthylacetic acid group into a hydrotalcite precursor; and then intercalating phoxim into the hydrotalcite precursor to obtain phoxim / naphthylacetic acid intercalated hydrotalcite; and putting the hydrotalcite into a mixed solution containing hydrogen peroxide, ethanol and waterfor ultrasonic treatment, thus obtaining the sustained-release phoxim pesticide, the chemical formula of which is shown as [(M<2+>)1-x(M3<+>)x(OH)2]<x+>(NAA<->)x(Phoxim)y.mH2O, wherein x=0.25-0.33, y=0.04-0.05, m=3-6, m is the number of interlayer crystal water molecules, M<2+> is a divalent metal ion, M<3+> is a trivalent metal ion, and Phoxim is phoxim. The sustained-release phoxim pesticide provided by the invention has a stable intercalation structure, can release phoxim for a long time and reach a sustained-release effect, and the preparation method is easy to realize.

Description

technical field [0001] The invention relates to the field of organic-inorganic composite materials, in particular to a slow-release phoxim pesticide and a preparation method thereof. Background technique [0002] Phoxim (Phoxim) is an important organophosphorus pesticide, its chemical name: Ο-α-cyanophenylene amino-Ο, Ο-diethyl phosphorothioate, the international common name of phoxim is Phoxim, the trade names include: phosxime, benisone, becyanon, cyanoxime, baixinsong and so on. Utilizing the properties of phoxim such as stomach toxicity, contact killing and long residual effect under dark conditions, it can be used to control borer pests such as longhorn beetles. In addition, the pesticide has a good effect on the larvae of various Lepidoptera pests that harm peanuts, wheat, rice, fruit trees, vegetables, mulberry, tea and other crops, and has a certain killing effect on insect eggs, and is also suitable for preventing and controlling warehouses. and sanitary pests. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N57/14A01N37/10A01N25/08A01P7/04
CPCA01N25/08A01N37/10A01N57/14
Inventor 耿佃国董美丽
Owner ZIBO VOCATIONAL INST
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