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Method for reducing oleic acid value and fluorine content of euphausia superba oil

A technology of Antarctic krill oil and Antarctic krill, which is applied in the fields of food, chemistry and medicine, can solve the problems of reducing the nutritional value of Antarctic krill oil, and achieve the effects of short cycle, low energy consumption and environmental friendliness

Active Publication Date: 2021-08-13
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are not suitable for Antarctic krill oil with high phospholipid content and high added value of free fatty acids, otherwise phospholipids and free omega-3 polyunsaturated fatty acids will be removed indiscriminately, and the Antarctic krill oil will be significantly reduced after treatment. nutritional value of oil

Method used

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  • Method for reducing oleic acid value and fluorine content of euphausia superba oil
  • Method for reducing oleic acid value and fluorine content of euphausia superba oil
  • Method for reducing oleic acid value and fluorine content of euphausia superba oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1 Ethanol extraction of Antarctic krill oil

[0045] Weigh 400g of Antarctic krill, add absolute ethanol at a mass ratio of solid to liquid of 1:5, stir at 150r / min for 120min at room temperature, and separate the upper phase rich in oil.

[0046] Take a certain amount of oil-rich upper phase at 25-40°C and a relative vacuum of -0.07-0.095 MPa to remove the solvent by rotary evaporation under reduced pressure to obtain crude Antarctic krill oil. The acid value is 59.21mg / g .

Embodiment 2

[0047] Example 2 Extraction of Antarctic krill oil by n-hexane / ethanol mixed solvent

[0048] Weigh 400g of Antarctic krill, add n-hexane / ethanol mixed solvent (n-hexane and ethanol mass ratio is 9:1) at a mass ratio of solid to liquid of 1:5, stir at 150r / min at room temperature for 120min, separate the oil-rich photogenic.

[0049] Take a certain amount of oil-rich upper phase at 25-40°C and a relative vacuum of -0.07-0.095MPa to remove the solvent by rotary evaporation under reduced pressure to obtain crude Antarctic krill oil. The acid value is 13.44mg / g .

Embodiment 3

[0050] Example 3 Chitin treatment of ethanol extraction of Antarctic krill oil upper phase

[0051] To the upper phase solvent rich in Antarctic krill oil obtained in Example 1, 1.5%, 7.5% and 15% of the mass of the upper phase solvent were added chitin, and stirred at 200 rpm for 30 min at 30°C. After centrifuging at 3000rpm for 5min to separate chitin, the obtained oil-containing organic phase was subjected to reduced-pressure rotary evaporation at 39°C and a relative vacuum of -0.095MPa, and the organic solvent was recovered to obtain the treated krill oil. Determine the acid value of krill oil, calculate the reduction rate of acid value, the result is as follows figure 1 As shown, chitin can effectively reduce the acid value by about 20%.

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Abstract

The invention discloses a method for reducing the oleic acid value and fluorine content of euphausia superba oil, and belongs to the technical field of food, biology and medicine. According to the method, chitosan derivatives such as chitin, chitosan and carboxymethyl chitosan are added as adsorbents into an oil-containing phase extracted by an organic solvent according to the adsorption principle, then the organic solvent and the adsorbents are recycled through operations such as solid-liquid separation and reduced pressure evaporation, and the euphausia superba oil which is low in acid value, low in fluorine, high in phospholipid and high in free fatty acid content is obtained. According to the method, phospholipid and free polyunsaturated fatty acid with high additional values are reserved while the oleic acid value and the fluorine content of the euphausia superba oil are reduced, and the method has the advantages of simplicity in operation, easiness in implementation, mild conditions, short period, low requirements on equipment, low energy consumption, environmental friendliness and the like, and is easy to industrialize.

Description

technical field [0001] The invention belongs to the technical fields of food, chemistry and medicine, and in particular relates to a method for reducing the acid value and fluorine content of Antarctic krill oil. Background technique [0002] Antarctic krill is a crustacean living in the Antarctic waters, which has attracted widespread attention because of its huge biological reserves and rich nutritional value. It is estimated that the total biomass of Antarctic krill in the Antarctic region can reach hundreds of millions to billions of tons, and the annual harvestable amount can reach tens of millions of tons. Fresh Antarctic krill contains about 80% water, 10% crude protein, 3% oil and a small amount of chitin and trace elements, and has great development and utilization potential. [0003] Antarctic krill oil has always been considered as the most important high-value component of Antarctic krill, and it is also the earliest developed Antarctic krill product. Antarctic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/10C11B1/10
CPCC11B1/10C11B3/10
Inventor 修志龙滕鑫楠王书昌董悦生
Owner DALIAN UNIV OF TECH