Fast barbasco extracting and purifying process

A technology of rotenone and extraction method, applied in the field of pesticides, can solve the problems of loss and waste of the original drug, slow extraction speed, environmental pollution, etc., and achieve the effects of less loss and waste, faster extraction speed, and reduced environmental pollution.

Inactive Publication Date: 2003-05-14
郑树芹
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Problems solved by technology

The applicant once applied for the patent of "extraction method of the original drug of rotenone", which effectively solved the industrial production problem of rotenone, but the extraction speed is still slow, and the production efficiency needs to be improved. Because carbon tetrachloride toxic solvent is used in the process, there is Environmental pollution and the loss and waste of original medicine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] Embodiment of Scheme 1: Take deer tenone root and pulverize it, extract it according to the process described in Scheme 1, put the rotenone paste obtained after shrinkage into a scrubber, pressurize and backwash it, discharge it after passing the test, and obtain the finished product after passing the drying inspection. The extract ratio and the temperature in the kettle are as follows in Table 1: The ratio of rotenone paste and detergent is shown in Table 2 below:

[0014] Alcohol ratio in detergent is shown in Table 3 below:

[0015] Note: The washing temperature is usually 10-15°C, preferably at the crystallization temperature.

[0016] Scheme two embodiment: take degeria root and pulverize, extract according to scheme two process.

[0017] The extraction solvent ratio and the temperature in the kettle are as follows in Table 4:

[0018] Note: The ratio of rotenone paste and detergent is the same as Table 2 and Table 3. In this article, the water content o...

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Abstract

The fast barbasco extracting and purifying process mainly includes crushing derris root, leaching in leaching solvent benzene or vinyl trichloride with water-displacing agent N, N-dimethyl formamide in 2.5-10 times the derris root volume, filtering, submicron suction filtering, depression concentration, washing in methanol, and ethanol, mixture, discharging, crystallization and stoving. The said process features fast extracting speed, high production efficiency, low cost, high barbasco yield and less environmental pollution and can be used in industrial production.

Description

technical field [0001] The invention relates to the technical field of pesticides. technical background [0002] The extensive use of chemical pesticides has played an important role in the control of pests for humans for a long time, but the pesticide residues on crops and vegetables also pose a serious threat to human health. Therefore, the development of biological source pesticides has become an environmental protection agriculture. an important way. The application of rotenone in insecticides can effectively solve the above problems. It is characterized by no phytotoxicity, no residue, no effect on food properties, and no resistance and re-emergence of pests. The applicant once applied for the patent of "extraction method of the original drug of rotenone", which effectively solved the industrial production problem of rotenone, but the extraction speed is still slow, and the production efficiency needs to be improved. Because carbon tetrachloride toxic solvent is used i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N65/20A01P7/00
Inventor 郑树芹寇进年兰俊贞刘钧平寇保祥
Owner 郑树芹
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