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Method for extracting high-quality krill oil from krill

A krill oil, high-quality technology, applied in the production of fat oil/fat, refining of fat oil/fat, and fat production, can solve the problems of easy adsorption of phospholipids, loss of effective components, etc., to achieve simple operation of the preparation process and improved storage stability Effect

Active Publication Date: 2020-05-22
LUHUA BIOMARINE SHANDONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are many ways to remove free fatty acids in oil, such as alkali refining, distillation, solvent extraction, esterification, biological deacidification, supercritical deacidification, etc. The most widely used in industrial production is alkali refining; but , alkaline substances will cause partial saponification of neutral oils and polar phospholipids, and at the same time, the soapstock formed by the saponification of free fatty acids can easily adsorb phospholipids, resulting in the loss of active ingredients

Method used

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  • Method for extracting high-quality krill oil from krill
  • Method for extracting high-quality krill oil from krill
  • Method for extracting high-quality krill oil from krill

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Example 1, krill oil extraction process and optimization when no alkali is added

[0042] The method for preparing krill oil from Antarctic krill powder comprises the steps:

[0043] S1, the Antarctic krill meal is subjected to countercurrent extraction with an organic solvent (ethanol) to obtain an extract;

[0044] S2. Distilling the extract obtained in step S1 under reduced pressure to obtain a concentrated solution;

[0045] S3, adding purified water to the concentrated solution in step S2 for refining, fully mixing and then standing to separate layers, collecting the crude oil in the lower layer;

[0046] S4. Mix the crude oil in the lower layer of step S3 with absolute ethanol, let it stand, filter, and retain the solution;

[0047] S5. The solution in step S4 is heated and desolvated by vacuum distillation to obtain purified and refined krill oil.

[0048] In step S1, the water content and ethanol concentration in the krill powder will affect the quality, extr...

Embodiment 2

[0072] Embodiment 2, alkali deacidification and process optimization

[0073] Using Antarctic krill powder as raw material, extract according to the method of Example 1, the difference is: the water is replaced with alkaline water, the Antarctic krill extract is concentrated to a solid content of 10% to 20%, and the concentrated solution is added Alkaline water (calculated as water) with a mass of 0.5-0.9 times, stirred for 1 hour, the stirring temperature was 25°C-60°C, and the stirring rate was 400-1000rpm / min; In absolute ethanol, filter; the filtrate is vacuum precipitated to obtain refined Antarctic krill oil.

[0074] The preparation of the alkaline water: sodium carbonate (soda ash) or sodium hydroxide (caustic soda) is dissolved in deionized water for preparation; the actual amount of caustic soda added is 0.9 to 1.2 times the theoretical amount of caustic soda added, and the actual amount of soda ash added is the theoretical amount of caustic soda added 0.5 to 1.5 ti...

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Abstract

The invention discloses a method for extracting high-quality krill oil from krill. The method comprises the following steps: S1, extracting krill with an organic solvent, and collecting an extract; S2, adding alkaline water into the extract to enable free fatty acid to form a fatty acid salt which is separated from an oil phase, enabling the oil phase to be separated from the water phase, and collecting the oil phase; and S3, purifying the oil phase to obtain the high-quality krill oil. According to the method, the preparation process of the krill oil is optimized, an organic solvent extraction method and an alkali refining method are ingeniously combined, and process parameters are adjusted and optimized, so the acid value of the krill oil is reduced, the content of effective components such as phospholipid and astaxanthin in the krill oil is guaranteed to the greatest extent, and the quality of the krill oil is improved.

Description

technical field [0001] The invention relates to the field of krill oil preparation, in particular to a method for extracting high-quality krill oil from krill. Background technique [0002] Antarctic krill belongs to crustaceans. There are about 85 species of krill in the global ocean, and about 7 to 8 species of krill are distributed in the Antarctic waters south of 50 degrees south latitude, so they are named Antarctic krill. The body length of Antarctic krill is 5.5-6.0cm, the life span is 5-7 years, the weight is about 2g, the trunk is transparent, and the reproductive ability is strong. In the Antarctic waters, the biomass of Antarctic krill is about 342-536 million tons, which is the largest biological resource of a single species in the world. Antarctic krill is rich in nutrients, including protein, lipids, antioxidant substances, such as astaxanthin, flavonoids, and vitamins A and E. [0003] Lipid components in Antarctic krill oil mainly include phospholipids, gly...

Claims

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Application Information

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IPC IPC(8): C11B1/10C11B3/06
CPCC11B1/10C11B1/102C11B3/06A61K31/20C11B3/001C11B3/006C11B3/008C11B3/12A23D9/02A23D9/04A23D9/007A23D9/05A23L33/115A23L17/40A23L17/20A23L17/00A23V2002/00B01D3/10
Inventor 范宁宁公绪海宗俊
Owner LUHUA BIOMARINE SHANDONG CO LTD
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