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Extraction method of Artemisia japonica botanical insecticide

A technology of plant insecticide and extraction method, which is applied in the field of extraction of Artemisia annua plant insecticides, can solve the problems of low content of insecticidal active ingredients, and achieve the effects of easy artificial synthesis, high content, and improved half-life

Inactive Publication Date: 2017-05-31
谢英全
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main technical problem to be solved by the present invention is to provide a method for extracting the Artemisia plant insecticide, so as to solve the problem that the content of insecticidal active ingredients in the Artemisia plant insecticide obtained by the existing extraction method of the Artemisia plant insecticide is low The problem

Method used

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Embodiment

[0015] The extraction method of Artemisia annua plant insecticide in this embodiment is carried out according to the following steps: 1) Put 80-120g of Artemisia annua powder and 14-18mL of ethanol with a mass concentration of 90%-96% into the extraction tank for CO2 supercritical Extract the CO2 extract, the extraction pressure is 30-40MPa, the extraction temperature is 40-60°C, the extraction time is 3-5h, and the CO2 flow rate is 2.0-2.5kg / h; 2) The CO2 extract obtained in step 1 is subjected to For separation, control the separation pressure to 5-15MPa, and the separation temperature to 20-30°C. The solid matter precipitated after separation is Artemisia annua plant insecticide.

[0016] In step 1, put 95g of Artemisia annua powder and 16mL ethanol with a mass concentration of 92% into the extraction cylinder.

[0017] In step 1, put 100 g of Artemisia annua powder and 16 mL of ethanol with a mass concentration of 95% into the extraction cylinder.

[0018] The extraction ...

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Abstract

The invention discloses an extraction method of an Artemisia japonica botanical insecticide. The invention relates to an extraction method of a botanical insecticide. The problem that Artemisia japonica botanical insecticides obtained by existing Artemisia japonica botanical insecticide extraction methods have low content of insecticidal active components is solved in the invention. The extraction method of the invention comprises the following steps: 1, putting Artemisia japonica powder and ethanol into an extraction tank and carrying out CO2 supercritical extraction so as to obtain a CO2 extracting solution; and 2, separating the CO2 extracting solution and precipitating out a solid (namely the Artemisia japonica botanical insecticide) after the separation. The Artemisia japonica botanical insecticide obtained by the extraction method has high content of insecticidal active components: terpene compounds account for about 43% of mass of the Artemisia japonica botanical insecticide, and selenium compounds account for about 36% of mass of the Artemisia japonica botanical insecticide.

Description

technical field [0001] The invention relates to a method for extracting a plant pesticide, in particular to a method for extracting a plant pesticide of Artemisia annua. Background technique [0002] Our country has a vast land and abundant resources, and there are abundant plant resources. Some plants contain insecticidal active ingredients that can be used to kill insects. We call these plants insecticidal plants, and insecticides extracted from insecticidal plants are called plant killers. Insecticides, most of the existing plant insecticides are extracted from Artemisia annua, and the insecticidal active ingredients in Artemisia annua are plaster-like compounds and helium-like compounds. The existing methods for extracting Artemisia arborescens insecticides mostly use ethanol, ether or methane soaking extraction to obtain Artemisia annua plant insecticides, but the content of insecticidal active ingredients in the obtained Artemisia annua plant insecticides is low, which...

Claims

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Application Information

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IPC IPC(8): A01N65/12A01N27/00A01N43/16A01P7/04A01P7/02
Inventor 谢英全
Owner 谢英全