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Method for extracting krill oil rich in phospholipid from euphausia superba

A technology of Antarctic krill oil and Antarctic krill, which is applied in the direction of fat oil/fat production and fat production, can solve the problems of complicated process and low phospholipid content of krill oil, and achieve simple extraction method, high phospholipid content and safe solvent practical effect

Inactive Publication Date: 2013-09-25
日照海大博远海洋生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods all have the problems of complicated process or low phospholipid content of krill oil.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for extracting krill oil rich in phospholipids from Antarctic krill, comprising the steps of:

[0016] Drying: Antarctic krill is freeze-dried or heat-dried, then crushed, ground, and passed through a 60-mesh sieve to obtain Antarctic krill powder with a water content of 8%;

[0017] Extraction: Take 100g of dried Antarctic krill powder, add 6 times the amount of n-hexane (w / v) of krill powder, stir and extract at 25°C for 3 hours, and filter;

[0018] Solvent evaporation: Evaporate the filtrate at a temperature of 40°C and a vacuum of -0.06MPa to remove the organic solvent in the extract to obtain crude Antarctic krill oil;

[0019] Enrichment of phospholipids: In the obtained Antarctic krill oil, the concentration of 1 times the weight is 95% ethanol aqueous solution, mix evenly, heat to 60 ° C, add 0.1% sodium chloride solution of 1 times the weight under stirring, in 4 Stand still at ℃ for 4 hours, the mixed solution will naturally separate into layers, ta...

Embodiment 2

[0022] Drying: Antarctic krill is freeze-dried or heat-dried, then crushed, ground and passed through a 60-mesh sieve to obtain Antarctic krill powder with a water content of 9%;

[0023] Extraction: take 100g of dried Antarctic krill powder, add 7 times the amount of n-hexane (w / v) of krill powder, stir and extract at 25°C for 4 hours, and filter;

[0024] Solvent evaporation: Evaporate the filtrate at a temperature of 35°C and a vacuum of -0.07MPa to remove the organic solvent in the extract to obtain crude Antarctic krill oil;

[0025] Enrichment of phospholipids: Add 2 times the weight of 60% ethanol aqueous solution to the obtained Antarctic krill oil, mix evenly, let stand at 4°C for 4 hours, the mixed solution will naturally separate, and the lower layer will be rich in phospholipids The ethanol solution of Antarctic krill oil; evaporate the lower solution at a temperature of 50 °C and a vacuum of -0.07MPa, remove the aqueous ethanol solution, and obtain 10.8 g of Antar...

Embodiment 3

[0028] Drying: Antarctic krill is freeze-dried or heat-dried, then crushed, ground and passed through a 60-mesh sieve to obtain Antarctic krill powder with a water content of 10%;

[0029] Extraction: Take 100g of dried Antarctic krill powder, add 8 times the amount of n-hexane (w / v) of krill powder, stir and extract at 25°C for 4 hours, and filter;

[0030] Solvent evaporation: Evaporate the filtrate at a temperature of 40°C and a vacuum of -0.08MPa to remove the organic solvent in the extract to obtain crude Antarctic krill oil;

[0031] Enrichment of phospholipids: In the obtained Antarctic krill oil, the concentration of 2 times of weight is 70% ethanol aqueous solution, mix uniformly, heat to 60 ° C, add 0.5% sodium chloride solution of 2 times of weight under stirring, in 4 Stand still at ℃ for 5 hours, the mixed solution will naturally separate into layers, take the ethanol solution of the Antarctic krill oil rich in phospholipids in the lower layer; evaporate the lower...

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Abstract

The invention discloses a method for extracting krill oil rich in phospholipid from euphausia superba. The method comprises the following steps of: A, drying; B, extracting; C, volatilizing a solvent; and D, concentrating phospholipid. Through the four steps, the phospholipid content of the obtained krill oil is high and more than 50 percent, the quality is good, and the obtained krill oil also contains multiple elements which are beneficial to the human body such as astaxanthin, unsaturated fatty acid, vitamin and trace elements; the concentrating step of the phospholipid adopts polarity organic solvent as a solvent, so that the residual extracting solvent in the krill oil can be further removed from the euphausia superba; not only can the euphausia superba krill oil with high phospholipid content be obtained, the euphausia superba krill oil on the upper solution in the concentration step also can be recycled, and the extracted euphausia superba powder also can be used for producing other products; and the extracting method is simple, the obtained product is stable in quality, and the used solvent is relatively safe and practical.

Description

technical field [0001] The invention relates to a method for extracting krill oil, in particular to a method for extracting phospholipid-rich krill oil from Antarctic krill. Background technique [0002] Antarctic krill ( Euphausia superba ), also known as giant krill or Antarctic krill, is a type of krill that lives in the waters of Antarctica. Antarctic krill live in the pollution-free Antarctic waters below 0°C for a long time and feed on phytoplankton (algae). The study found that Antarctic krill is currently one of the organisms with the highest protein content in the world, with a protein content of 17% in wet weight and 70% in dry weight. Active substances such as astaxanthin and low-temperature enzymes have broad application prospects in the fields of medicine, chemical industry, agriculture, and aquatic products, and their comprehensive development value is huge. [0003] The fat content of Antarctic krill accounts for 1-6% of the wet weight. The main oil types i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/10C11B1/02
Inventor 曹荣军于志鹏刘少芳薛长湖杨庆利孙杰任宪君张秋艳
Owner 日照海大博远海洋生物科技有限公司
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