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Preparation method of krill oil with double-solvent extraction of high-esterified astaxanthin and high phospholipids

An astaxanthin and dual-solvent technology is applied in the direction of fat oil/fat production and fat production, which can solve the problems of low phospholipid content, environmental and safety problems, and difficulty in completely removing residual solvents, and achieve good extraction effect and high extraction efficiency. high effect

Active Publication Date: 2017-12-08
山东康境海洋生物工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of these five patents are that it is difficult to completely remove the residual solvent in the method of extracting oil from acetone, ethyl acetate and n-hexane, and there are also environmental and safety problems in the production process, while the supercritical extraction of phospholipids from Antarctic krill oil Low content, high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The first step, drying: dry Antarctic krill at 65°C to obtain dried Antarctic krill with a water content (mass percentage) of 10%; the second step, extraction: take 4 times the weight and mass of dried Antarctic krill respectively A mixture of ethanol and n-hexane with a percentage concentration of 85% was continuously extracted from dried Antarctic krill in countercurrent at 25°C for 1 hour, and the dried Antarctic krill was filtered out of the extract by filtration; The ratio is 1:0.2; the third step, concentration: the extract is concentrated at a temperature of 35°C and a vacuum of -0.08Mpa, so that the weight of the extract is 0.5 times the weight of dried Antarctic krill, and the concentration is stopped. The fourth step, the extraction of esterified astaxanthin and phospholipids: put the above-mentioned concentrated solution in a centrifuge, centrifuge at 9000 rpm, and evaporate the lower layer of separated liquid at a temperature of 35°C and a vacuum of -0.08Mpa....

Embodiment 2

[0027] The first step, drying: dry Antarctic krill at 65°C to obtain dried Antarctic krill with a water content (mass percentage) of 10%; the second step, extraction: take 6 times the weight and mass of dried Antarctic krill respectively A mixture of ethanol and n-hexane with a percentage concentration of 90% was continuously extracted from dried Antarctic krill in countercurrent at 35°C for 2 hours, and the extract was filtered out from the dried Antarctic krill; The ratio is 1:0.3; the third step, concentration: Concentrate the extract at a temperature of 35°C and a vacuum of -0.085Mpa, so that the weight of the extract is twice the weight of dried Antarctic krill, and stop the concentration. The fourth step, the extraction of esterified astaxanthin and phospholipids: put the above concentrated solution in a centrifuge, centrifuge at 10,000 rpm, and evaporate the lower layer of separated liquid at a temperature of 35°C and a vacuum of -0.085Mpa. Remove n-hexane and part of t...

Embodiment 3

[0029] The first step, drying: dry Antarctic krill at 65°C to obtain dried Antarctic krill with a water content (mass percentage) of 10%; the second step, extraction: take 8 times the weight and mass of dried Antarctic krill respectively A mixture of acetone and n-hexane with a percentage concentration of 95% was continuously extracted from dried Antarctic krill in countercurrent at 30°C for 3 hours, and the extract was filtered out from the dried Antarctic krill; Filter out the dried Antarctic krill; the mass ratio of ethanol to n-hexane is 1:0.7; the third step, concentration: concentrate the extract at a temperature of 35°C and a vacuum of -0.09Mpa, so that the weight of the extract is dry 1.5 times the weight of Antarctic krill, stop enrichment. The fourth step, the extraction of esterified astaxanthin and phospholipids: put the above concentrated solution in a centrifuge, centrifuge at 12000 rpm, and evaporate the lower layer separation solution at a temperature of 35°C a...

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Abstract

The invention relates to a deep processing of euphausia superba, and provides a preparation method of a krill oil with high esterified astaxanthin and high phospholipid content by double-solvent extraction. The invention aims to solve the problems of low extraction efficiency and high cost of the prior art, and provides an extraction method of krill oil with high esterified astaxanthin and high phospholipid content. A technical scheme is as below: drying euphausia superb, conducting continuous countercurrent extraction by a strong polar organic solvent, concentrating, separating the concentrate in a centrifuge, and evaporating the lower separated liquid, so as to obtain krill oil with high astaxanthin content higher than 1000ppm and high phospholipid content (mass percentage) higher than 42%; and continuously introducing nitrogen or carbon dioxide gas at room temperature and removing the residual polar organic solvent to obtain a final product. The method not only maintains the astaxanthin content in krill oil but also ensures that the other nutrient elements are not destroyed, and the extraction effect of esterified astaxanthin and phospholipid is good; and the after extraction, the euphausia superba can also be used for production of other products.

Description

technical field [0001] The invention relates to deep processing of Antarctic krill, in particular to a method for extracting krill oil with high esterification astaxanthin and high phospholipid content from Antarctic krill. Background technique [0002] Antarctic krill live in the pollution-free Antarctic waters below 0°C for a long time and feed on phytoplankton (algae). [0003] Studies have found that Antarctic krill is rich in antioxidant nutrients, such as vitamins A, E, astaxanthin and flavonoids. Astaxanthin is a member of the carotenoid family. Due to its special structure, its antioxidant capacity is also different. Experiments have found that its antioxidant capacity is 10 times that of β-carotene and 500 times that of vitamins. Therefore, eating Antarctic krill is not only beneficial to brain health, but also has good effects on anti-free radicals and delaying aging. Another study pointed out that astaxanthin has another feature that it can cross the blood-brai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B1/10C11B1/00
CPCC11B1/00C11B1/10
Inventor 曾宪龙
Owner 山东康境海洋生物工程有限公司