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Method for supercritical extraction of linolenic acid

A linolenic acid, supercritical technology, applied in the direction of fatty acid production, fatty acid preparation/refining, etc., can solve the problems of linolenic acid product purity needs to be improved, extraction rate needs to be further improved, and extraction temperature is high, so as to regulate human physiological functions and improve human body Physiological functions, the effect of improving the extraction rate

Active Publication Date: 2014-04-02
吴雪弘
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method simplifies the extraction and preparation process, shortens the reaction time, and improves the conversion rate; however, a large amount of lipase is used in the extraction, resulting in the product purity of the linolenic acid to be improved
CN1062897C discloses a method for extracting linolenic acid from linseed oil. The method is to carry out supercritical carbon dioxide extraction of fresh cold-pressed linseed oil, the extraction temperature is 25-90 ° C, and adding metal balls as a dispersant, and then the above-mentioned The extraction mixture is subjected to vacuum separation and rectification to obtain high-purity linolenic acid; however, the extraction temperature of this method is relatively high, and the extraction rate needs to be further improved

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take linseed oil and liquid CO 2 , linseed oil and liquid CO 2 The mass mixing ratio of the mixture is 1:1.8, injected into the extraction reaction kettle with a preheating temperature of 40°C, adding the above-mentioned magnetic steel balls whose mass is 10% of the total mass and whose diameter is 0.5mm, and the pressure of the extraction reaction kettle is adjusted to be 1.82× 10 7 Pa, under the condition of sufficient stirring, extract for 30 minutes to obtain the extraction product 1. The obtained extraction product 1 is injected into the separator for separation, and the CO 2 The extracted product 2 was obtained. The obtained extraction product 2 was injected into a horizontal vacuum rectification device, separated and purified at normal temperature and 90kPa to obtain linolenic acid with a purity of 95.8%. The extraction rate of linolenic acid is 89%.

Embodiment 2

[0029] Take linseed oil and liquid CO 2 , linseed oil and liquid CO 2 The mass mixing ratio of the mixture is 1: 2.2, injected into the extraction reactor whose preheating temperature is 35°C, adding the above-mentioned magnetic steel balls with a mass of 9% of the total mass and a diameter of 0.5mm, and adjusting the pressure of the extraction reactor to be 1.82×10 7 Pa, under the condition of sufficient stirring, extract for 30 minutes to obtain the extraction product 1. The obtained extraction product 1 is injected into the separator for separation, and the CO 2 The extracted product 2 was obtained. The obtained extraction product 2 was injected into a horizontal vacuum rectification device, separated and purified at normal temperature and 50kPa, and a linolenic acid product with a purity of 97.3% was obtained. The extraction rate of linolenic acid is 92%.

Embodiment 3

[0031] Take linseed oil and liquid CO2, linseed oil and liquid CO 2 The mass mixing ratio of the mixture is 1:2.2, injected into the extraction reactor whose preheating temperature is 38°C, adding the above-mentioned magnetic steel balls whose mass is 10% of the total mass and whose diameter is 0.5mm, and the pressure of the extraction reactor is adjusted to be 1.80×10 7 Pa, under the condition of sufficient stirring, the extraction time is 30 minutes, and the extraction product 1 is obtained. The obtained extraction product 1 is injected into the separator for separation, and the CO 2 The extracted product 2 was obtained. The obtained extraction product 2 was injected into a horizontal vacuum rectification device, separated and purified at normal temperature and 30kPa to obtain a linolenic acid product with a purity of 98.6%. The extraction rate of linolenic acid is 93%.

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Abstract

The invention relates to a method for supercritical extraction of linolenic acid, which adopts linseed oil as a raw material, introduces magnetic steel balls as dispersants, and extracts linolenic acid by microwave combined with CO2 supercutical fluid as a solvent. The method of the invention is simple in steps, easy to operate, and has an extraction rate of up to 88-95%, and a purity of up to 95-98%; the method needs no entrainers, is low in extraction temperature, and maintains the biological activity of linolenic acid to the maximum extent; the obtained linolenic acid is easy to absorb and use by human body, has very good effects on human body physiological function regulation, blood lipid level reduction, thrombogenesis inhibition, and resistance to cardiovascular diseases such as arrhythmia and the like.

Description

technical field [0001] The invention relates to the technical field of supercritical extraction, more specifically, the invention relates to a method for assisted extraction of linolenic acid by using microwaves. Background technique [0002] In recent years, with people's emphasis on health and the improvement of quality of life, the research and understanding of α-linolenic acid has gradually deepened. Studies have found that α-linolenic acid can regulate the immune system, reduce blood lipids, reduce blood viscosity, delay Body aging, anti-cancer and anti-cancer functions, are essential fatty acids for the human body. α-linolenic acid is not a medicine, it is a kind of food in edible oil, and it is a kind of health care product when it is made into capsules. [0003] The fatty acid content in the linseed oil is 9-11wt%, the oleic acid is 13-29wt%, the linoleic acid is 15-30wt%, and the linolenic acid is 40-60wt%. Although the content of linseed oil in the fatty acids co...

Claims

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Application Information

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IPC IPC(8): C11C1/00C11C1/10
Inventor 吴雪弘王源浩
Owner 吴雪弘