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Fast method for continuouslly extracting nim oil and nimbin raw medicine from nim seed

An extraction method, the technology of neem oil, which is applied in the field of rapid and continuous extraction of neem oil and azadirachtin raw materials, can solve the problem of long extraction time of azadirachtin, difficult crushing of neem seeds, and low extraction rate of azadirachtin and other problems, to achieve the effect of reducing the crushing process, less equipment and high extraction rate

Inactive Publication Date: 2007-09-05
THE RES INST OF RESOURCES INSECTS RIRI OF THE CHINESE ACADEMY OF FORESTRY
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Problems solved by technology

[0009] Aiming at the problem that neem seeds are extremely difficult to crush, and the problem that the extraction of azadirachtin takes a long time, and the problems of high equipment cost and low extraction rate of azadirachtin, a kind of neem oil and azadirachtin is proposed. The rapid continuous extraction method of the original drug

Method used

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  • Fast method for continuouslly extracting nim oil and nimbin raw medicine from nim seed

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A. According to neem seeds: the ratio of solvent = 1: 1W / V, directly add industrial grade 60 ℃ petroleum ether in neem seeds, at a speed of 10000r / min, under normal temperature and pressure, stir and extract for 1.5min, intermittently 1.5min, then stir for 1.5min, rest for 1.5min, stir and extract again for 1.5min, then carry out intermittent stirring and extraction, the total stirring time is 4.5min, the total intermittent time is 3min, then take out and filter;

[0024] B. Add new petroleum ether solvent into the filter cake according to the ratio of 1:1W / V. At a speed of 12000r / min, under normal temperature and pressure, stir and extract for 1.5min, intermittently for 1.5min, then stir for 1.5min, intermittently 1.5min, stirring and extracting again for 1.5min, and intermittently stirring and extracting in this way, the stirring time is 4.5min in total, and the intermittent time is 3min in total, then take it out and filter, and repeat the extraction 3 times;

[0025...

Embodiment 2

[0031] A. According to the ratio of neem seeds: solvent = 1: 1.3W / V, directly add industrial grade 90°C petroleum ether to neem seeds, at a speed of 12000r / min, under normal temperature and pressure, stir and extract for 1min, intermittently Stir for 1min, then stir for 1min, rest for 1min, stir and extract again for 1min, then perform intermittent stirring and extraction for a total of 3min, and a total of 2min for the intermittent time, then remove and filter;

[0032] B. Add new petroleum ether solvent into the filter cake according to the ratio of 1:1.3W / V, at a speed of 12000r / min, under normal temperature and pressure, stir and extract for 1min, intermittently for 1min, then stir for 1min, intermittently for 1min, Stir and extract again for 1 min, and perform intermittent stirring and extraction in this way. The stirring time is 3 minutes in total, and the intermittent time is 2 minutes in total. After that, take it out and filter, and repeat the extraction 4 times in thi...

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Abstract

A fast method for extracting nim oil and nimbin from nim seed is carried out by leaching while extracting for solvent and agitating at normal temperature and pressure 10000-12000r / min to obtain the final product. The extractive rate can reach to 3.2-3.4wt% and oil-out rate can reach to 31.6-33.7wt%; It's fast, economic and simple and can be used for industrial production.

Description

technical field [0001] The invention relates to a plant extraction method, in particular to a rapid and continuous extraction method of neem oil and azadirachtin original medicine. Background technique [0002] Azadirachtin is a high-efficiency biological pesticide, which is not easy to make pests resistant to pesticides, does not harm the environment, and has a very broad application prospect. The extraction technology of azadirachtin is the core and basic technology for the development of azadirachtin industry. The extraction yield determines the economic benefits and even success of the enterprise. The yield is determined by two factors: first, the solvent and process selected for extraction determine the azadirachtin. How much azadirachtin in neem is utilized; the second is the extraction process and concentration drying method determine the loss rate of azadirachtin. Neem oil is not researched and applied as the main product in neem products, but in the process of extr...

Claims

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Application Information

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IPC IPC(8): C11B1/10C07D493/02A01N65/00A01N43/90
Inventor 段琼芬王有琼孙龙
Owner THE RES INST OF RESOURCES INSECTS RIRI OF THE CHINESE ACADEMY OF FORESTRY
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