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Method for extracting and purifying alpha-linolenic acid

A technology of linolenic acid and purity, applied in the field of extraction and purification of unsaturated fatty acids, can solve problems such as human health hazards and urea residues, and achieve the effect of no toxic substances and high purity

Inactive Publication Date: 2013-08-14
YANTAI YANYUAN KORMARK BIOTECH DEV
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Problems solved by technology

[0004] At present, most of the existing methods for extracting and purifying α-linolenic acid are urea-inclusion methods. This method will leave urea residues and cause harm to human health. At present, the country has gradually restricted the use of urea-inclusion methods for the extraction and purification of α-linolenic acid.

Method used

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Embodiment 1

[0015] A method for extracting and purifying α-linolenic acid, carried out according to the following steps:

[0016] The first step: pretreating the α-linolenic acid raw material oil: the pretreatment step includes entering inspection, impurity removal and coarse filtration of the commercially available α-linolenic acid raw material oil;

[0017] The second step: carry out ethyl esterification to the pretreated α-linolenic acid raw material oil: mix the pretreated α-linolenic acid raw material oil with 95% ethanol evenly, under the conditions of alkaline catalyst and vacuum state, 70 React at -75°C for 1-2 hours, then wash and separate with water;

[0018] The third step: Preliminary purification of α-linolenic acid by gradient freezing method: in the first stage, the product obtained in the second step is lowered from the original temperature to 0°C, kept for 1 hour, washed and filtered, and in the second stage from 0°C to -10°C ℃, heat preservation for 1h, washing ...

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Abstract

The invention relates to a method for extracting and purifying alpha-linolenic acid. The method comprises the following steps of: 1, pre-treating a raw material of alpha-linolenic acid raw oil; 2, carrying out ethyl esterification on the pre-treated alpha-linolenic acid raw oil; 3, preliminarily purifying the alpha-linolenic acid by using a gradient freezing method to obtain the alpha-linolenic acid of which the purity is greater than 70%; and 4, further purifying the alpha-linolenic acid by using a three-stage molecular distillation method to obtain the alpha-linolenic acid of which the purity is 90.5-92.5%. The method has the beneficial effects that the purity of the product is high, the alpha-linolenic acid of which the purity is 90.5-92.5% is obtained, and a pure physical extracting and purifying method is adopted to replace the conventional urea inclusion process and ensure that the alpha-linolenic acid product does not have urea residues and toxic substances.

Description

[0001] technical field [0002] The invention relates to a method for extracting and purifying unsaturated fatty acids, in particular to a method for extracting and purifying alpha-linolenic acid. Background technique [0003] α-linolenic acid is an essential polyunsaturated fatty acid for the human body and is the core substance of life. The scientific research results of authoritative research institutions show that its metabolites EPA and DHA have preventive effects on more than 50 kinds of diseases, and can inhibit the production of diene prostaglandins, which can inhibit the function of immune cells; α-linolenic acid acts as Essential fatty acids can also regulate lipid metabolism, and lipid metabolism disorders can cause low immunity. [0004] At present, most of the existing methods for extracting and purifying α-linolenic acid are urea inclusion method, which will leave urea residues and cause harm to human health. At present, the country has gradually restricted th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C1/02C11C1/08C11C1/10
Inventor 陈学沛姬卫国董晓娜
Owner YANTAI YANYUAN KORMARK BIOTECH DEV
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