Preparation method of tung meal extract insecticide

An extract and pesticide technology, which is applied in the field of preparation of tung meal extract pesticides, can solve problems such as unfavorable health and sustainable development of tung oil, environmental pollution, waste of resources, etc., and achieves solutions to the lack of biological pesticides, killing The effect of high insect rate and low production cost

Inactive Publication Date: 2012-08-01
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the early days, although tung meal was used to kill soil pests or clean fish ponds, for a long time, people mainly used it as fertilizer and returned it to the field. In this way, it will cause waste of resources and pollute the environment to a certain extent, which is not conducive to Promoting the Healthy and Sustainable Development of my country's Tung Industrialization

Method used

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  • Preparation method of tung meal extract insecticide
  • Preparation method of tung meal extract insecticide
  • Preparation method of tung meal extract insecticide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] This embodiment includes the following steps:

[0019] (1) After the tung meal is dried, it is pulverized by a pulverizer, passed through a 50-mesh sieve, and then heated to 100°C with ethanol with a volume fraction of 95% for reflux extraction for 3 times, and the mass of ethanol added each time is equivalent to 5 times the quality of the sieved matter, each extraction time is 2 hours, and then the extracts are combined, and the ethanol is recovered by vacuum distillation with a rotary evaporator, until all the ethanol is volatilized, and the alcohol extract extract is obtained;

[0020] (2) Add water to the alcohol extract extract obtained in step (1) and mix evenly, the quality of the added water is equivalent to 1 times the mass of the extract;

[0021] (3) Add ethyl acetate to the aqueous solution of the alcohol extract obtained in step (2), the quality of the added ethyl acetate is equivalent to 3 times the mass of the aqueous solution of the alcohol extract, stir...

Embodiment 2

[0039] The difference between this example and Example 1 is that the tung meal extract extract obtained in step (3) is mixed with surfactants, emulsifiers, and organic solvents at a mass percentage of 60:10:10:20 to obtain an emulsifiable cream type Tung meal extract insecticide.

[0040]The surfactant used in the described cream type tung meal extract insecticide is polyoxyethylene ether, of course, it can also be polyoxypropylene ether, alkyl phosphate, alkylbenzene sulfonate, bisphenol polyether, fatty acid One or more mixtures of glycerides, etc.; the emulsifier used is alkylphenol polyoxyethylene ether, of course, it can also be octylphenol polyoxyethylene ether, alkylbenzenesulfonate, stearyl polyoxyethylene ether One or more mixtures of phosphate ester, nonylphenol polyoxyethylene ether, etc.; the organic solvent used is methanol, of course, ethanol, ethyl acetate, isopropanol, isobutanol, n-hexane, toluene, etc. one or a mixture of several.

[0041] The insecticidal ...

Embodiment 3

[0058] The difference between this example and Example 1 is that after drying the tung meal extract extract obtained in step (3), it is pulverized by a pulverizer, passed through a 300-mesh sieve, and then mixed with surfactants, fillers, and pesticide assistants according to the sieved material. The agent is mixed according to the mass percentage of 50:10:25:15 to prepare a wettable powder type tung meal extract insecticide.

[0059] The used filler of described wettable powder type tung meal extract insecticide is diatomite, certainly, also can be one or more mixtures in talcum powder, bentonite and zeolite; Used surfactant is polyoxyethylene ether, Of course, it can also be one or more mixtures of polyoxypropylene ether, alkylbenzene sulfonate, alkyl phosphate, bisphenol polyether, fatty acid glyceride, etc.; the pesticide adjuvant used is lauryl sulfate Sodium, of course, can also be one or a mixture of dispersant Z, sodium lignosulfonate, etc.

[0060] The insecticidal e...

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Abstract

The invention relates to a preparation method of a tung meal extract insecticide, which comprises the following steps that (1) tung meal is pulverized by a pulverizing machine after being dried, then the pulverized tung meal passes through a sieve with 50 or more meshes, the tung meal which passes through the sieve is heated and extracted for 2 to 4 times in a reflowing manner by ethanol with a volume fraction of 60 to 95 percent, and the extracted liquid is decompressed and distilled so as to recycle ethanol after being mixed, so that alcohol extract is obtained; (2) water is added to the alcohol extract and is uniformly mixed with the alcohol extract; (3) ethyl acetate is placed into the alcohol extract aqueous solution to be blended for 10 to 30 minutes, then the mixed solution is held and leached for 1 to 3 hours to be layered in a stationary way, and an upper layer of water phase is obtained to be decompressed and distilled so as to recycle the ethyl acetate, so that upper concentration liquid is obtained; and the leaching is repeated for 2 to 4 times, and the upper concentration liquid is decompressed and distilled so as to remove the residual ethyl acetate after being mixed, so that the tung meal extract, i.e. the tung meal extract insecticide is obtained. By utilizing the preparation method, the tung meal resource can be adequately developed and utilized, and the additional value of the tung meal can be improved by processing the tung meal into the plant insecticide.

Description

technical field [0001] The invention relates to a preparation method of a plant insecticide, in particular to a preparation method of a tung meal extract insecticide. Background technique [0002] At present, chemical pesticides are gradually developing in the direction of high efficiency, low toxicity and low residue. Due to the requirements of environmental protection and the proposal of green chemistry, modern pesticides should be safer non-polluting pesticides or pollution-free pesticides, that is, green pesticides compatible with the environment. The use of biopesticides is showing an increasing trend year by year. For example, western developed countries require the use of biopesticides to gradually reach 60% in recent years, while my country plans to make the use of biopesticides account for 50% of the total amount of pesticides by 2015. Scientists from all over the world are trying to find efficient, low toxicity, no residue, no pollution, and cheap natural insectic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N65/18A01P7/04
CPCY02A50/30
Inventor 毛绍名章怀云
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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