Critical extraction method for rotenone

A critical extraction and rotenone technology, applied in the production of bulk chemicals, organic chemistry, etc., can solve problems such as serious environmental hazards, and achieve the effects of avoiding soil compaction, high extraction rate, and high operational safety

Inactive Publication Date: 2013-04-17
深圳市华农生物工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a critical extraction method

Method used

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  • Critical extraction method for rotenone

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Experimental program
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Effect test

Embodiment 1

[0036] The method for critical extraction of rotenone in this embodiment includes crushing, extracting and concentrating the leaves of edamame; including the following extraction steps:

[0037] A, at first mass ratio is 0.5:6 the African bean leaf powder and the extraction solution are added in the extraction tank, and described extraction solution is by the N.N dimethylformamide and the chloroform that the mass ratio is 1:5 Composition; B. Then control the leaching temperature at 50°C and stir for 1 hour; C. Add the liquid in the leaching tank to the heating tank, raise the temperature to 62°C, chloroform volatilizes into the condensation tank, cools to liquid and then returns to the leaching tank. In the extraction tank; D, step A and step B are circulated for 4h, and the edamame leaf powder is extracted 4 times again; E, finally, the liquid in the heating tank is recovered to obtain the product. After testing, the extraction rate of rotenone Reached 87%.

[0038] The extr...

Embodiment 2

[0041] The method for critical extraction of rotenone in this embodiment includes crushing, extracting and concentrating the leaves of edamame; including the following extraction steps:

[0042] A, at first mass ratio is that 1:6 the African bean leaf powder and the extraction liquid join in the extraction tank, and described extraction liquid is by the N.N dimethylformamide and the chloroform that the mass ratio is 1:10 Composition; B. Then control the leaching temperature at 55°C and stir for 2 hours; C. Add the liquid in the leaching tank to the heating tank, raise the temperature to 68°C, chloroform volatilizes into the condensation tank, cools into a liquid, and then returns to the leaching tank. In the extraction tank; D, step A and step B are circulated for 5h, and the edamame leaf powder is extracted twice again; E, finally, the liquid in the heating tank is recovered to obtain the product. After testing, the extraction rate of rotenone Reach 90%.

[0043] The extract...

Embodiment 3

[0046] The critical extraction method of rotenone in this embodiment includes crushing, extracting and concentrating the leaves of Bean edamame; including the following extraction steps:

[0047] A, at first mass ratio is 1.5:6 the African bean leaf powder and the extraction solution are added in the extraction tank, and described extraction solution is by the N.N dimethylformamide and the chloroform that the mass ratio is 1:15 Composition; B. Then control the leaching temperature at 55°C and stir for 2 hours; C. Add the liquid in the leaching tank to the heating tank, raise the temperature to 65°C, chloroform volatilizes and enters the condensing tank, cools to a liquid and then returns to the leaching tank In the extraction tank; D, step A and step B are circulated for 5h, and the edamame leaf powder is extracted twice again; E, finally, the liquid in the heating tank is recovered to obtain the product. After testing, the extraction rate of rotenone Reach 90%.

[0048] The ...

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Abstract

The invention discloses a critical extraction method for rotenone, which comprises the following steps: S1, crushing the plant tissue containing the rotenone component to obtain plant powder, adding the plant powder and a leaching solution into a leaching tank, controlling the leaching temperature to be 50-55 DEG C, and stirring for 1-2 h; S2, adding the solution in the leaching tank into a heating tank, and heating and maintaining the temperature to be 62-68 DEG C; S3, cooling chloroform entering into a condensation tank after volatilization to the liquid and reflowing to the leaching tank, and leaching the plant powder once again; S4, repeating the steps of S2 and S3 for one to four times; and S5, recovering the liquid in the heating tank. According to the invention, the critical extraction method uses the original leaching solution and performs circulating concentration through the volatilization and reflowing of chloroform, so as to solve the problems of soil compaction, decline of fertility, serious environmental pollution and large influence on non-target organisms brought by the methylbenzene which is used as an extractant. According to the invention, the method has a high extraction rate to rotenone, and is high in operation safety and more environment-friendly.

Description

technical field [0001] The invention relates to the field of insecticide preparation, in particular to a critical extraction method for rotenone. Background technique [0002] Rotenone is a kind of high-efficiency insecticidal active substance extracted from the vines of the genus Rotenaceae. It has contact killing and stomach poisoning effects on pests. After entering the insect body, it interferes with the growth and development of cells and weakens their respiration. The worm body cannot get the energy supply, moves sluggishly and dies. It is safe to the environment, humans and animals, natural enemies of pests and other beneficial organisms, and pests are not easy to develop drug resistance, and rotenone is easily oxidized in the air, and has little impact on surrounding organisms and the environment, so it is an environmentally friendly insecticidal active substance. [0003] However, at present, the industrial extraction of rotenone biopesticide is carried out by the ...

Claims

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Application Information

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IPC IPC(8): C07D493/14
CPCY02P20/54
Inventor 黄少鸿
Owner 深圳市华农生物工程有限公司
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