A kind of preparation method and application of rosin source pesticide synergist
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A technology of synergist and rosin, applied in the fields of botanical equipment and methods, application, pesticides, etc., can solve the problems of low technology content, long synthesis route, environmental pollution, etc., and achieve broad-spectrum, high-efficiency, and low cost. , the effect of high yield
Active Publication Date: 2020-04-07
GUANGXI NORMAL UNIV
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Dimethyldioxybenzene derivatives, synergistic ether, synergistic phosphorus, synergistic sulfone, etc. are commonly used synergists at present. However, these traditional synergists have disadvantages such as long synthetic routes, high prices, and environmental pollution. , so new, low toxicity, environmental protection, cheap, especially the green pesticide synergist derived from natural products is the ideal synergist needed by farmers, and it is one of the goals that require the majority of scientific research workers to focus on
my country is rich in rosin resources and is the world's largest producer and exporter of rosin. At present, my country's rosin is basically still in the stage of selling raw materials, and there are fewer varieties of deep-processed products, about 30 kinds, and the raw materials used for deep processing account for only 70%. %, products with low technological content and low added value
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Embodiment 1
[0023] Add 1 L of 95% ethanol to 370 g of rosin fragments, heat to 50°C and stir to dissolve to obtain a rosin solution. Another 110 g of rosin fragments were weighed, and in a molten state at 90 °C, 70 mL of potassium hydroxide with a mass fraction of 15% was slowly added for saponification, and reacted for 0.3 h. Then add 200 mL of the above-prepared rosin solution to the saponification solution, stir evenly, adjust the pH to 7 with potassium hydroxide solution, add 35 mL of 0204 emulsifier, add ethanol to 1 L, and filter to obtain a synergist.
[0024] The surface tension test results of the synergist prepared in Example 1, the measuring method adopts the platinum plate method, after the synergist is diluted with water to different times, it is measured with a semi-automatic surface tension meter.
[0025]
[0026] It can be seen from Table 1 that the prepared synergist has the effect of significantly reducing the surface tension of water.
Embodiment 2
[0028] Add 1 L of 90% ethanol to 400 g of rosin fragments, heat to 60°C and stir to dissolve to obtain a rosin solution. Another 100 g of rosin fragments was weighed, and in a molten state at 110 °C, slowly add 60 mL of 20% sodium hydroxide for saponification, and react for 0.5 h to obtain a saponified solution. Then add 150 mL of the above-mentioned rosin solution to the saponification solution, stir evenly, adjust the pH to 7 with sodium hydroxide, then add 50 mL of 500# emulsifier, add ethanol to 1 L, and filter to obtain a synergist.
Embodiment 3
[0030] Add 1 L of ethanol to 330 g of rosin fragments, heat to 40°C and stir to dissolve to obtain a rosin solution. Another 110 g of rosin fragments were weighed, and in a molten state at 130 °C, slowly add 60 mL of 15% sodium hydroxide for saponification, and react for 1 h to obtain a saponified solution. Then add 150 mL of the above-mentioned rosin solution to the saponification solution, stir evenly, adjust the pH to 7 with acetic acid, then add 40 mL of OP-10 emulsifier, add ethanol to 1 L, and filter to obtain a synergist.
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Abstract
The invention discloses a preparation method and application of a rosin-source pesticide synergist. The preparation method includes: adding an alcohol solution into rosin fragments for dissolving to obtain a rosin solution; adding an alkali solution into the rosin fragments for saponification to obtain a saponified solution; adding the rosin solution into the saponified solution, stirring and mixing well, adjusting pH, adding an emulsifier for emulsifying, adding the alcohol solution, and filtering to obtain the synergist. Raw materials are low in cost and easy to get, a preparation path is simple, reaction conditions are mild, and the preparation method is energy-saving, environment-friendly, low in requirements on equipment, simple, convenient and safe to operate, low in cost, high in yield and easy for industrialized production. The synergist obtained by the preparation method can improve wetting capability and adhesion force of pesticide liquid; after the synergist is compounded with various pesticides like insecticide, miticide and herbicide, pesticide efficacy is improved remarkably, pesticide consumption is lowered, and the synergist has the advantages of broad-spectrum high efficiency and low toxicity and safety to humans and livestock, and is suitable for large-scale popularization and application and remarkable in economic and social benefit.
Description
technical field [0001] The invention relates to a pesticide synergist, in particular to a synergist capable of improving the efficacy of pesticides such as known insecticides, acaricides and herbicides, and a preparation method and application thereof. Background technique [0002] my country is a large agricultural production country, and the development of agriculture is inseparable from pesticides. However, while pesticides make great contributions to agricultural development, they also pollute the natural environment. Various field efficacy experiments over the past few decades have shown that most of the currently used pesticides have low wettability and adhesion. Into the atmosphere, it seriously damages the balance of agricultural ecology and brings harm to humans and livestock. To change this situation, efforts should be made to develop new pesticides with high efficiency, low toxicity and low residue, and to limit and eliminate the use of highly toxic pesticides. ...
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