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Method for extracting euphausiid oil with low acid value, low protein content and low salt content from euphausiids

A low-protein, low-acid value technology, applied in the production of fat/fat, refining of fat/fat, and fat production, can solve the problems of reducing the quality of krill oil, destroying astaxanthin, etc., to protect biologically active substances, reduce The effect of liquid volume, simple method

Active Publication Date: 2015-02-04
辽渔南极磷虾科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If krill oil is deacidified by the same method, high temperature will destroy active substances such as astaxanthin, thereby reducing the quality of krill oil, so traditional high temperature deacidification is not suitable for krill oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Cook and smash the caught fresh krill on board, take 1kg of crushed shrimp and mix with 15kg of absolute alcohol, stir and extract at -10°C for 2h. Then utilize the explosion-proof centrifuge to centrifugally separate the extract and the residue, filter the extract through a 1200-mesh filter cloth, add 0.9kg of distilled water to it, leave it standing after stirring, and collect the oil phase after the oil-water two-phase layering ends, then in 30 The finished krill oil is obtained by flash evaporation at ℃. The krill oil obtained by the method is purple-red in color, clear and transparent, has the taste of fresh shrimp, has good fluidity, has a phospholipid content of 42.1%, an acid value of 5.3 mgKOH / g, a protein content of 3.5%, ash content of 2.1%, and an astaxanthin content of 42.1%. It is 541.7ppm. If the extract is directly distilled after extraction with alcohol, the obtained krill oil will be viscous and less transparent, with an acid value of 25.1mgKOH / g, a p...

Embodiment 2

[0023] Cook and dry the frozen krill until the water content is 3%. After crushing, mix 1kg of krill powder with 10kg of acetone, and stir and extract at 50°C for 4h. Then use a press to separate the extract and residue, filter the extract through a 1200-mesh filter cloth, add 20kg of deionized water to it, stir and mix, centrifuge in a high-speed centrifuge, separate the oil-water two-phase, collect the oil phase and add 0.5kg of deionized water to it. Carbon disulfide is obtained by ordinary distillation at 50°C to obtain finished krill oil. The krill oil obtained by the method is purple in color, clear and transparent, has the taste of fresh shrimp, has good fluidity, has a phospholipid content of 38.7%, an acid value of 4.9 mgKOH / g, a protein content of 1.5%, ash content of 0.6%, and an astaxanthin content of It is 580.7ppm. If the extract is directly distilled after extraction with acetone, the obtained krill oil has an acid value of 15.6mgKOH / g, a protein content of 6.3...

Embodiment 3

[0025] Mix 1 kg of shrimp powder made from dried krill enzymatic hydrolyzate with 3.5 kg of ethanol / chloroform (ratio 2:1) mixed extractant, and stir and extract at 20°C for 1 hour. Then use a plate and frame filter to separate the extract and residue, filter the extract through a 1200-mesh filter cloth, add 2kg of distilled water to it and stir and mix, after centrifugation in a high-speed centrifuge, the oil-water two-phase layer, collect the oil phase and add 0.3 kg of distilled water to it. kg of chloroform, at 50°C to obtain the finished krill oil by distillation under reduced pressure. The krill oil obtained by the method is purple in color, clear and transparent, has a fresh shrimp taste, good fluidity, a phospholipid content of 34.4%, an acid value of 8.2mgKOH / g, a protein content of 2.3%, ash content of 1.0%, and astaxanthin The content is 510.8ppm. If the extract is directly distilled after extraction with a mixed extractant, the obtained krill oil has an acid value...

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Abstract

The invention relates to a method for extracting euphausiid oil with a low acid value, low protein content and low salt content from euphausiids under mild conditions. The method comprises the steps of mixing euphausiids and an organic extracting agent according to the proportion of (1:3.5)-(1:15), stirring and extracting at the temperature of 10 DEG C below zero to 75 DEG C for 0.5-5h, and then, separating residues to obtain an extraction liquid; directly adding water into the extraction liquid, or firstly concentrating the extraction liquid at the temperature of 30-70 DEG C, then, adding water into the concentrated extraction liquid until the water content is up to 10-80% to realize oil water phase separation, collecting an oil phase, and distilling at the temperature of 30-70 DEG C to obtain a finished product of the euphausiid oil. The method is simple in process flow, free of complex equipment, flexible in site selection, mild in condition and free of damage to bioactive substances such as astaxanthin and the like when impurities such as free fatty acids, salt, proteins and the like are removed, so that the quality of the euphausiid oil is greatly improved.

Description

technical field [0001] The invention relates to a method for producing krill oil from krill, in particular to a method for producing shrimp oil with low acid value, low protein and low salt content under mild conditions. Background technique [0002] Studies have shown that omega-3 unsaturated fatty acids have a potential role in preventing cardiovascular diseases, cognitive impairment, joint disease and inflammation and other related diseases, and the supplementation of unsaturated fatty acids has been recognized by most people. At present, deep-sea fish oil, as the main omega-3 unsaturated fatty acid supplement, is in increasing demand, and the market size of fish oil is growing at a rate of 8% per year. As demand grows and fish stocks are depleted, fish oil will soon be unable to meet the growing demand. [0003] Krill is one of the largest single biological resources on the earth, with huge reserves, and the estimated total biomass is about 650-1000 million tons. The o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B1/10C11B3/00C11B3/12
Inventor 刘建君苏学锋赵伟胥亚夫王元好冯迪娜刘洋
Owner 辽渔南极磷虾科技发展有限公司
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