Low-temperature extraction and purification process of botanical pesticide toosendanin

A plant-derived pesticide, toosendanin technology, applied in the direction of organic chemistry, steroids, etc., can solve the problems of toosendanin’s difficult large-scale application, flocs are not easy to filter, and the loss of active ingredients, so as to promote market application, The effect of reducing production costs, reducing pollution and unsafety

Pending Publication Date: 2021-06-11
杨化廷 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flocs produced by flocculation with chitosan are not easy to filter, resulting in the loss of a large amount of active ingredients
The loss of raw materials caused by the purification of petroleum ether and chitosan. In the current existing process, the concentration of the final product is below 0.5%. A large number of repeated purifications will lead to a sharp increase in production costs, which is difficult to meet the actual market. This is also the key to making it difficult to realize the large-scale application of botanical pesticides toosendanin

Method used

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  • Low-temperature extraction and purification process of botanical pesticide toosendanin
  • Low-temperature extraction and purification process of botanical pesticide toosendanin
  • Low-temperature extraction and purification process of botanical pesticide toosendanin

Examples

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Effect test

Embodiment 1

[0029] A low-temperature extraction and purification process of botanical pesticide toosendanin, comprising the following steps:

[0030] (1) get the Fructus Fructus Fructus, dry and pulverize, sieve, add ethanol solution to fully soak, then carry out countercurrent ultrasonic extraction, extraction temperature 25 ℃, obtain the ethanol crude extract of Fructus Fructus;

[0031] (2) after the ethanol crude extract is filtered, obtain the ethanol essence extract of Chuan Neem, and place in a storage tank for storage;

[0032] (3) low-temperature vacuum concentration is carried out by the Fructus Fructus Fructus ethanol extract, vacuum tightness is-0.1MPa, and the relative density of Fructus Fructus Fructus is 1.2 by vacuum concentration, and obtains Fructus Fructus Fructus concentrate;

[0033] (4) Place the concentrated solution of Fructus Tendaridis in the condensation tank and leave it to stand at low temperature for stratification, and the standing time is 24h;

[0034] (5)...

Embodiment 2

[0043] A low-temperature extraction and purification process of botanical pesticide toosendanin, comprising the following steps:

[0044] (1) get the Fructus Fructus Fructus, dry and pulverize, sieve, add the ethanol solution to fully soak, then carry out countercurrent ultrasonic extraction, the extraction temperature is 30 ℃, obtain the ethanol crude extract of Fructus Fructus;

[0045] (2) after the ethanol crude extract is filtered, obtain the ethanol essence extract of Chuan Neem, and place in a storage tank for storage;

[0046] (3) low-temperature vacuum concentration is carried out by the Fructus Fructus Fructus ethanol extract, vacuum tightness is-0.1MPa, and the relative density of Fructus Fructus Fructus is 1.2 by vacuum concentration, and obtains Fructus Fructus Fructus concentrate;

[0047] (4) Place the concentrated solution of Fructus Tendaridis in the condensation tank and leave it to stand at low temperature for stratification, and the standing time is 24h;

...

Embodiment 3

[0057] A low-temperature extraction and purification process of botanical pesticide toosendanin, comprising the following steps:

[0058] (1) get the Fructus Fructus Fructus, dry and pulverize, sieve, add the ethanol solution to fully soak, then carry out countercurrent ultrasonic extraction, the extraction temperature is 40 ℃, obtain the ethanol crude extract of Fructus Fructus;

[0059] (2) after the ethanol crude extract is filtered, obtain the ethanol essence extract of Chuan Neem, and place in a storage tank for storage;

[0060] (3) low-temperature vacuum concentration is carried out by the Fructus Fructus Fructus ethanol extract, vacuum tightness is-0.1MPa, and the relative density of Fructus Fructus Fructus is 1.2 by vacuum concentration, and obtains Fructus Fructus Fructus concentrate;

[0061] (4) Place the concentrated solution of Fructus Tendaridis in the condensation tank and leave it to stand at low temperature for stratification, and the standing time is 24h;

...

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Abstract

The invention discloses a low-temperature extraction and purification process of botanical pesticide toosendanin, and belongs to the technical field of biology. According to the method, toosendanin is purified at a low temperature, the toosendanin is concentrated to the standard density through vacuum, rapid layering of the toosendan fruit ethanol refined extract is achieved, ethanol extraction is conducted on the upper-layer extract again, efficient extraction of toosendanin is achieved, and the concentration of the obtained toosendanin mother liquor is larger than or equal to 1%. Petroleum ether, chitosan and other components are not used in the whole technological process, pollution and insecurity caused by use of an organic solvent are greatly reduced, the technological process is simplified, the loss of toosendanin is reduced, the production cost of the botanical pesticide is greatly reduced, marketization application of the botanical pesticide is promoted, and wide economic benefits and social benefits are achieved.

Description

technical field [0001] The invention belongs to the field of biotechnology, and in particular relates to a low-temperature extraction and purification process of toosendanin. Background technique [0002] Pesticides can be divided into three categories according to their sources: biological sources, mineral sources, and chemical synthesis. There are few types of mineral source pesticides, and the development prospects are not very bright. Chemical pesticides have their high-efficiency side and can play a role in the occurrence of a large number of pests and diseases, but the "three Rs" problems arising from the use of chemical pesticides, namely Residue (Residue), resistance (Resistance) and pests rampant (Resurgence) increasingly serious. Countries around the world are gradually restricting the production and use of chemical pesticides, and it is increasingly difficult to develop new varieties of chemical pesticides and commercialize them. development has encountered mor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07J71/00
CPCC07J71/0005
Inventor 杨化廷郑效良
Owner 杨化廷
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