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Method for extracting krill oil with high fatty acid content from antarctic krill

A technology of Antarctic krill and Antarctic krill powder, applied in the direction of fat production, fat oil/fat production, etc., can solve the problems of incomplete solvent removal, high cost, low fatty acid content of Antarctic krill oil, etc.

Active Publication Date: 2019-02-12
MARINE FISHERIES RES INST OF ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to overcome the problems of incomplete solvent removal, high cost, low extraction rate and low fatty acid content in Antarctic krill oil in the traditional extraction process of Antarctic krill oil, the present invention provides a method for extracting high fatty acid from Antarctic krill oil. The method of containing shrimp oil has a high extraction rate, no residue, no special requirements for equipment, mild process conditions, and easy industrialization

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  • Method for extracting krill oil with high fatty acid content from antarctic krill
  • Method for extracting krill oil with high fatty acid content from antarctic krill

Examples

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Effect test

Embodiment 1

[0033] (1) Take the frozen Antarctic krill raw material, put it in the refrigerator and thaw it away from light (4°C for 12 hours), after the thawing is complete, drain it; put the thawed Antarctic krill (moisture content 85%) in a vacuum freeze dryer- Under the condition of 45°C, freeze-dry overnight to control the water content within 7%; use a blade grinder to crush the dried shrimp to more than 60 mesh to obtain Antarctic krill powder;

[0034] (2) According to the solid-liquid volume ratio of Antarctic krill powder and organic solvent is 1:5, add organic solvent (ethanol:n-hexane=1:1) to leaching the Antarctic krill powder in step (1), vortex Spin for 10 minutes, centrifuge at a centrifugal rate of 4500r / min for 3-5 minutes, and take the supernatant;

[0035] (3) Continuously extract the supernatant liquid in step (2) three times, dry it with nitrogen and concentrate it to 10% of the stock solution, wash it three times with water to take the upper organic phase, and rotar...

Embodiment 2

[0037] (1) Take the frozen Antarctic krill raw material, put it in the refrigerator and thaw it away from light (4°C for 12 hours), after the thawing is complete, drain it; put the thawed Antarctic krill (moisture content 85%) in a vacuum freeze dryer- Under the condition of 45°C, freeze-dry overnight to control the water content within 7%; use a blade grinder to crush the dried shrimp to more than 60 mesh to obtain Antarctic krill powder;

[0038] (2) Take 3g of Antarctic krill powder from step (1) in a 50mL centrifuge tube, add 2mL of ethanol aqueous solution with a volume fraction of 95%, and mix well; ), and mix well; put the centrifuge tube in a water bath at 80°C for 40 minutes for hydrolysis;

[0039] (3) According to the solid-liquid volume ratio of Antarctic krill powder and organic solvent is 1:6, add organic solvent (ethanol:n-hexane=1:1) to the Antarctic krill powder after acid hydrolysis treatment in step (2) Extract, vortex for 8min, centrifuge at 4800r / min for ...

Embodiment 3

[0042] (1) Take the frozen Antarctic krill raw material, put it in the refrigerator and thaw it away from light (4°C for 12 hours), after the thawing is complete, drain it; put the thawed Antarctic krill (moisture content 85%) in a vacuum freeze dryer- Under the condition of 45°C, freeze-dry overnight to control the water content within 7%; use a blade grinder to crush the dried shrimp to more than 60 mesh to obtain Antarctic krill powder;

[0043] (2) Take 3g of Antarctic krill powder from step (1) in a 50mL centrifuge tube, add 2mL of ethanol aqueous solution with a volume fraction of 95%, and mix well; ), mix well; put the centrifuge tube in a water bath at 75°C for 45 minutes for hydrolysis;

[0044] (3) According to the solid-liquid volume ratio of Antarctic krill powder and organic solvent is 1:7, add organic solvent (ethanol:n-hexane=1:1) to Antarctic krill powder after acid hydrolysis treatment in step (2) For leaching, vortex for 8-12 minutes, centrifuge at 4000r / min...

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Abstract

The invention relates to the technical field of seafood processing, and provides a method for extracting krill oil with high fatty acid content from antarctic krill in order to solve the problems thata solvent cannot be removed thoroughly, the cost is high, the extraction rate is low, the fatty acid content in the antarctic krill oil is low existing in a traditional extraction technology of antarctic krill oil. The method comprises the following steps that (1) antarctic krill is subjected to freeze drying, the tissue is crushed, and antarctic krill powder is obtained; (2) an organic solvent is added to conduct leaching, vortex and centrifugalization, and the supernatant liquid is taken; and (3) the supernatant liquid is extracted, concentrated and washed, a superstratum organic phase is taken and subjected to rotary steaming, and the krill oil with the high fatty acid content is obtained. The antarctic krill oil extracted by adopting the method has the high fatty acid content, wherein, EPA (eicosapentaenoic acid) and DHA (dehydroascorbic acid) account for 48.8% and 27.8% of the total amount of the fatty acid in the antarctic krill oil.

Description

technical field [0001] The invention relates to the technical field of seafood processing, in particular to a method for extracting shrimp oil with high fatty acid content from Antarctic krill. Background technique [0002] Antarctic krill (Euphausia superba), also known as giant krill or Antarctic krill, is a small marine planktonic crustacean belonging to the phylum Arthropoda, class Crustacea, order Krill, and family Krillidae. In the Antarctic waters south of 50° latitude, Antarctic krill has a huge amount of biological resources and is the largest protein source in the world. At present, Antarctic krill products mainly include feed grade dried shrimp powder, frozen krill, shrimp oil, food grade (frozen and canned), dried shrimp, shrimp oil, pharmaceutical grade krill oil, etc. [0003] The main components of Antarctic krill oil (Krill Oil) are glycerides, phospholipids, astaxanthin, DHA (Docosahexenoic acid) and EPA (Eicosapntemacnioc acid), which can promote brain dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/02C11B1/10
CPCC11B1/02C11B1/10
Inventor 张帅方益胡梦玲方双琪梅光明
Owner MARINE FISHERIES RES INST OF ZHEJIANG
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