Fast extracting and purifying process for fast barbasco

Abstract

The present invention relates to a rapid purification and extraction method of rotenone original drug. The main process is to pulverize deertenone root and stir and extract it in an extraction kettle. Pure benzene or trichlorethylene is added to the water-repelling agent N·N-dimethylformamide, after coarse filtration and submicron suction filtration, it is concentrated in a reactor under reduced pressure, and washed in a scrubber. The washing liquid is an alcohol substance. Such as methanol, ethanol mixed liquid, etc.; washing qualified discharge, drying the crystals to obtain the finished product. The invention is characterized by fast extraction speed, high production efficiency, low production cost, less waste of rotenone, high recovery rate, can effectively reduce environmental pollution, and is especially suitable for industrial application.

Description

technical field

[0001] The invention relates to the technical field of pesticides. Background technique

[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. 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 in the process, there is Environmental pollution and the loss and waste of the original drug. Contents of the in...

Examples

Embodiment Construction

[0014] 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 for pressurized backflush washing, discharge after passing the test, and obtain the finished product after passing the drying inspection.

[0015] The extract ratio and the temperature in the kettle are as follows in Table 1:

[0016]

[0017] The ratio of rotenone paste and detergent is shown in Table 2 below:

[0018]

[0019] Alcohol ratio in detergent is shown in Table 3 below:

[0020]

[0021] Note: The washing temperature is usually 10-15°C, preferably at the crystallization temperature. Scheme two embodiment: take degeria root and pulverize, extract according to scheme two process.

[0022] The extraction solvent ratio and the temperature in the kettle are as follows in Table 4:

[0023]

[0024] Note: The ratio of rotenone paste and detergent is the same as Table...

technical field

[0001] The invention relates to the technical field of pesticides. Background technique

[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. 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 in the process, there is Environmental pollution and the loss and waste of the original drug. Contents of the in...

Examples

Embodiment Construction

[0014] 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 for pressurized backflush washing, discharge after passing the test, and obtain the finished product after passing the drying inspection.

[0015] The extract ratio and the temperature in the kettle are as follows in Table 1:

[0016]

[0017] The ratio of rotenone paste and detergent is shown in Table 2 below:

[0018]

[0019] Alcohol ratio in detergent is shown in Table 3 below:

[0020]

[0021] Note: The washing temperature is usually 10-15°C, preferably at the crystallization temperature. Scheme two embodiment: take degeria root and pulverize, extract according to scheme two process.

[0022] The extraction solvent ratio and the temperature in the kettle are as follows in Table 4:

[0023]

[0024] Note: The ratio of rotenone paste and detergent is the same as Table...

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