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Preparation method of hemp seed oil with high polyunsaturated fatty acid content

A technology of unsaturated fatty acids and hemp seed oil, which is applied in the direction of fat oil/fat refining and fat production, can solve the problems of polyunsaturated fatty acid enrichment and purification methods in hemp oil that have not yet been seen, and achieve good industrial preparation prospects. Enhanced nutritional and functional value, easy to operate effect

Pending Publication Date: 2022-04-22
YUNNAN HEMPMON PHARMA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The prior art is only a physical and chemical extraction method for hemp oil (such as patents CN102703204A and CN102585999A) or its primary application (such as patents CN108077929A and US006063369A), and there is no specific enrichment and purification method for polyunsaturated fatty acids in hemp oil

Method used

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  • Preparation method of hemp seed oil with high polyunsaturated fatty acid content
  • Preparation method of hemp seed oil with high polyunsaturated fatty acid content
  • Preparation method of hemp seed oil with high polyunsaturated fatty acid content

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] Hemp seed oil with high unsaturated fatty acid content was prepared as follows.

[0113] ① Weigh 500g of sodium hydroxide, dissolve it in 30L of 90% ethanol (Vol%) to make a mixed solution, place it in a reaction kettle, put in 3kg of commercially available hemp oil raw material, keep the temperature at 70°C, stir for 30min, and perform the cracking reaction.

[0114]② After the cleavage reaction is completed, lower the temperature to 0°C, and solid fatty acid precipitation in the form of Na salt will appear. Continue to incubate for 30 minutes, stir evenly, put it into a centrifuge, centrifuge at 3000rpm, discard the ethanol test solution, -0.065MPa, 65°C Concentrate under reduced pressure to recover ethanol; the sodium fatty acid solid was rinsed twice with saturated saline, redissolved in water, adjusted to pH 2.0 with 6M hydrochloric acid, and separated completely after standing for 15 minutes. Back-extract twice, and completely separate the water phase to obtain 2....

Embodiment 2

[0118] Hemp seed oil with high unsaturated fatty acid content was prepared as follows.

[0119] ①Weigh 3kg of ammonium bicarbonate, dissolve it in 30L 60% acetone (Vol%) solution to make a mixed solution, put it in a reaction kettle, put into 10kg of oil leftovers produced by pressing hemp oil in the factory, keep the temperature at 40°C, stir for 120min, and carry out Crack.

[0120] ② After the cleavage reaction is completed, move to the concentration tank, concentrate under reduced pressure at -0.085MPa at 45°C, and recover acetone; return to the reaction kettle to cool down to room temperature, then stir while adjusting the pH to 4.0 with 6M phosphoric acid, and let it stand for 20 minutes to separate layers , take the fatty acid in the upper layer oil phase separately, back-extract three times with 15L pure water, and completely separate the water phase to obtain 9.58kg of fatty acid crude product oil;

[0121] ③Transfer the crude fatty acid oil above to a solid-phase ex...

Embodiment 3

[0125] Hemp seed oil with high unsaturated fatty acid content was prepared as follows.

[0126] ① Weigh 500g of potassium hydroxide, disperse it in 12L of n-heptane to make a mixed solution, place it in a reaction kettle, add 3kg of commercially available hemp oil, keep the temperature at 60°C, and fully stir for 60min to carry out cracking.

[0127] ② After the cleavage reaction is completed, move to the concentration tank, concentrate under reduced pressure at -0.075MPa at 60°C, and recover heptane; add 1L of purified water while it is hot, and return to the reactor to room temperature, then stir while adjusting the pH to 4.0, stand for 25 minutes to separate the layers, separate the fatty acid in the oil phase of the upper layer, back-extract three times with 6L pure water, completely separate the water phase, and obtain 2.78kg of crude fatty acid oil;

[0128] ③Transfer the crude fatty acid oil above to a solid-phase extraction column (8L, d:L=1:4) equipped with 3kg of dry...

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Abstract

The invention discloses a preparation method of hemp seed oil with high polyunsaturated fatty acid content, which is characterized by comprising the following steps: (1) obtaining a mixed solution containing an alkaline reagent and an organic solvent, adding raw material oil, and carrying out cracking reaction to obtain a cracking reaction solution; (2) treating the cracking reaction liquid, adjusting the pH value by using acid, separating to obtain an upper-layer oil phase, and carrying out reverse extraction by using pure water to obtain a fatty acid crude product; and (3) performing solid-phase extraction and purification on the fatty acid crude product to obtain the hemp seed oil with high polyunsaturated fatty acid content. In the hemp seed oil with the high polyunsaturated fatty acid content, the total polyunsaturated fatty acid content is 75%-100%, and the nutrition and efficacy value of the hemp seed oil are remarkably improved. By adopting a mode of combining alkali cracking with solid-phase extraction and purification, the whole preparation process is easy to control in conditions, low in equipment requirement, simple and convenient to operate, large in treatment capacity and easy for industrial production, and has an extremely good industrial preparation prospect.

Description

technical field [0001] The application relates to a preparation method of hemp seed oil with high polyunsaturated fatty acid content, and belongs to the technical field of hemp seed oil processing and extraction. Background technique [0002] Hemp seed (Hemp seed) is the dry mature seed of the Moraceae Cannabis plant cannabis, oval, with a smooth, thin and brittle shell, the kernel is milky white, rich in oil, and has a light smell. Hemp seed has the same medicine and food, and its medicinal use was first seen in "Shen Nong's Materia Medica". In recent years, hemp seed has been widely used as health food and clinical medicine in my country. With economic development and social progress, people's understanding of hemp seed is no longer limited to a single clinical use, but more attention is paid to its blood fat lowering, anti-oxidation, lowering blood pressure, improving learning and memory, anti-aging and health care and other effects. Among them, the most important one ...

Claims

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Application Information

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IPC IPC(8): C11B3/00C11B3/06C11B3/10
CPCC11B3/001C11B3/06C11B3/006C11B3/10
Inventor 赵兵常坦然袁晓凡赵庆生柳旭李慧龙赵丽梅高伟博李如彦李庆中
Owner YUNNAN HEMPMON PHARMA CO LTD
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