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Method for extracting antarctic krill grease and separating biological active substance

A biologically active substance, Antarctic krill technology, which is applied in the production of fat oil/fat, recovery of fat oil/fatty acid from waste, and fat production, can solve the problems of high energy consumption and low utilization rate of Antarctic krill, and achieve oil extraction. The effect of high efficiency, solving solvent residues and reducing energy consumption

Inactive Publication Date: 2012-09-19
DALIAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of large energy consumption and low utilization rate of Antarctic krill in the current Antarctic krill oil extraction process, the invention provides a mixed solvent extraction and hydrophobic organic solvent / hydrophilic organic solvent / salt / water three Combining liquid phase extraction method to extract oil from Antarctic krill and at the same time separate bioactive substances from krill

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Extraction of Antarctic krill oil with n-hexane

[0019] Step 1: Take 1.5 kg of Antarctic krill frozen shrimp pieces, add 4.5 kg of n-hexane to the Antarctic krill frozen shrimp pieces at a mass ratio of 3:1, stir and extract at a speed of 150 rpm for 2 hours, and separate the rich oil photogenic. During the extraction process, the temperature gradually increased from -20°C to 20°C.

[0020] Step 2: At a temperature of 25~40°C and a relative vacuum of -0.07~-0.095 Mpa, distill under reduced pressure and remove the solvent n-hexane to obtain Antarctic krill crude oil rich in phospholipids and polyunsaturated fatty acids , while recovering the solvent, the solvent recovery rate was 79.5%.

[0021] Step 3: Dry and filter the obtained Antarctic krill crude oil to remove impurities, and calculate the oil yield and extraction rate. The oil yield relative to the wet weight of Antarctic krill was 0.35%, the extraction rate was 11.22%, and the phospholipid content ...

Embodiment 2

[0022] Example 2: Ethanol extraction of oil from Antarctic krill

[0023] Step 1: Take 1.5 kg of Antarctic krill frozen shrimp pieces, add 4.5 kg of ethanol to the Antarctic krill frozen shrimp pieces at a mass ratio of 3:1, stir and extract at a speed of 150 rpm for 2 hours, and separate the fat-rich photogenic. During the extraction process, the temperature gradually increased from -20°C to 20°C.

[0024] Step 2: Distill under reduced pressure at a temperature of 25~40°C and a relative vacuum of -0.07~-0.095 Mpa to remove the solvent ethanol to obtain Antarctic krill crude oil rich in phospholipids and polyunsaturated fatty acids. At the same time, the solvent was recovered, and the solvent recovery rate was 76.3%.

[0025] Step 3: Dry and filter the obtained Antarctic krill crude oil to remove impurities, and calculate the oil yield and extraction rate. The oil yield relative to the wet weight of Antarctic krill was 0.26%, and the extraction rate was 8.33%; the phospholi...

Embodiment 3

[0026] Example 3: Extraction of Antarctic krill oil by n-hexane / ethanol mixed solvent

[0027] Step 1: Take 1.5 kg of Antarctic krill frozen shrimp pieces, add 4.5 kg of n-hexane / ethanol mixed solvent to the Antarctic krill frozen shrimp pieces at a mass ratio of 3:1, wherein the mass ratio of n-hexane and ethanol is 10:1; Stir the extraction at 150 rpm for 2 hours and separate the oil-rich upper phase. During the extraction process, the temperature gradually increased from -20°C to 20°C.

[0028] Step 2: At a temperature of 25~40°C and a relative vacuum of -0.07~-0.095 Mpa, distill under reduced pressure and remove the solvent to obtain Antarctic krill crude oil rich in phospholipids and polyunsaturated fatty acids. At the same time The solvent was recovered, and the solvent recovery rate was 78.5%.

[0029] Step 3: Dry and filter the obtained Antarctic krill oil to remove impurities, and calculate the oil yield and extraction rate. The oil yield relative to the wet weight...

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Abstract

The invention discloses a method for extracting antarctic krill grease and separating other biological active substances, and belongs to the technical field of deep processing of marine food products. Aiming at the characteristics that the water content of antarctic krill is high and the antarctic krill is easy to autolyze, the grease can be directly extracted from the frozen antarctic krill at low temperature by using hydrophobic and hydrophilic mixed solvents; a salt solution and a common organic solvent are added into residues and an organic solvent / salt multi-phase salting-out extracting system is formed by using salting-out extracting effect; the distributions of biological active substances with different polarities in the antarctic krill in each phase are different according to a solubility difference; and furthermore, the residual grease is extracted to obtain astaxanthin; and shrimp meat proteins are separated and the solvents in the residues are recycled. The method disclosed by the invention is simple in operation and easy to realize, and has low cost, short period and moderate extracting conditions, and the organic solvents are cheap and easy to recycle, so that the method is easy to industrialize.

Description

technical field [0001] The technology belongs to the technical field of deep processing of seafood, and relates to a method for extracting Antarctic krill oil and separating bioactive substances, in particular to a method for extracting Antarctic krill bioactive substances by salting out. Background technique [0002] As the largest single biological resource in the Southern Ocean, Antarctic krill is an important group of marine zooplankton. According to the latest estimates, the biomass of Antarctic krill is 650-1000 million tons, and it has attracted increasing attention because of its huge biomass and potential fishery resources, as well as its special status in the Antarctic ecosystem. [0003] Antarctic krill not only has huge resources, but also has high nutritional value and contains a variety of rich biologically active substances, which has attracted great attention from all over the world. The oil content in Antarctic krill accounts for about 15% of its dry weigh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/10C11B13/02
Inventor 修志龙惠欢庆李晓晖王元好王嘉麒冀平
Owner DALIAN UNIV OF TECH
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