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Method for preparing squid liver oil

A technology of liver oil and squid, which is applied in the field of squid liver oil preparation, can solve the problems of loss of nutrients, loss of neutral oil, and inability to achieve simultaneous enrichment, etc., to avoid loss of neutral oil, fast speed, and good promotion and application prospects Effect

Active Publication Date: 2015-12-09
威海博宇食品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing squid liver oil extraction and refining technology mainly takes n-3 polyunsaturated fatty acid as the target product, which not only leads to the loss of neutral oil in the process of deacidification by caustic soda neutralization, but also leads to the loss of astaxanthin under alkaline conditions. Down-conversion to astaxanthin, and in the decolorization process of squid liver oil, astaxanthin is removed together, resulting in the loss of nutrients, and it is impossible to realize the simultaneous decolorization of n-3 polyunsaturated fatty acids and astaxanthin in squid liver oil. enrichment

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] The preparation method of this squid liver oil adopts the following steps:

[0032] (1) Take 500 g of fresh squid liver and add 200 g of water, beat and centrifuge to obtain the upper layer of red oil, which is the crude squid liver oil, with a weight of 110.5 g and an acid value of 6.18 mg / g;

[0033] (2) Carry out molecular distillation to the crude squid liver oil obtained in step (1) at 160° C. and 0.1 to 1 Pa, collect the heavy phase of molecular distillation to obtain 102.4 g of squid liver oil with low acid value, and its acid value is 0.27 mg / g, the content of astaxanthin is 0.0412%, and the content of EPA and DHA is 15.7% and 19.2% respectively;

[0034] (3) Add 15g of absolute ethanol to the low-acid value squid liver oil obtained in step (2) and mix and then add 5.0g of immobilized lipase Lipozyme435 to make the immobilized lipase catalyze the combination of low-acid value squid liver oil with anhydrous Ethanol was stirred and reacted at a temperature of 40...

Embodiment 2

[0039] (1) Take 5 kg of fresh squid liver and add 2 kg of water, beat and centrifuge to obtain the upper layer of red oil, which is the crude squid liver oil, with a weight of 1.2 kg and an acid value of 6.05 mg / g;

[0040] (2) The squid liver oil crude product obtained in step (1) is molecularly distilled at 160° C. and 0.1 to 5 Pa, and the molecular distillation heavy phase is collected to obtain 1.15 kg of squid liver oil with low acid value, and its acid value is 0.34 mg / g, the content of astaxanthin is 0.0423%, and the content of EPA and DHA is 16.1% and 19.5% respectively;

[0041] (3) Add 180g of absolute ethanol to the low-acid value squid liver oil obtained in step (2) and mix and then add 60g of immobilized lipase Lipozyme435 to make the immobilized lipase catalyze the combination of low-acid value squid liver oil and absolute ethanol Stirring and reacting at a temperature of 40°C for 12 hours, catalyzing the enzymatic reaction of squid liver oil and absolute ethano...

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Abstract

The invention relates to a method for preparing squid liver oil. A molecular distillation process is employed for removing free fatty acids in low-acid-value squid liver oil and further for reducing the acid value, neutral grease loss caused by acid removal in a caustic-soda neutralization method is avoided, and also astaxanthin is prevented from being converted into astacene under an alkali condition. Additionally, through an enzyme-promoted transesterification reaction and by utilizing the selectivity of immobilized lipase, saturated fatty acids and low-unsaturation-degree fatty acids are preferentially reacted with anhydrous ethanol, and n-3 polyunsaturated fatty acids are relatively enriched on glycerin skeleton. The reaction conditions are mild, efficiency is high and speed is fast. Simultaneous enriching of n-3 polyunsaturated fatty acids and astaxanthin in squid liver oil is realized, and the method possesses good popularization application prospect.

Description

Technical field: [0001] The invention relates to the technical field of marine organisms, in particular to a method for preparing squid liver oil. Background technique: [0002] Squid liver is the main by-product of squid processing, accounting for about 15% of squid wet weight, its crude fat content is about 20% to 30%, EPA and DHA in squid liver account for more than 30% of the total fatty acid content, and EPA And DHA, as the representative of n-3 series polyunsaturated fatty acids, has many important physiological functions, such as regulating lipid metabolism, anti-inflammation, anti-cancer and promoting the development of brain and visual system, etc. Squid liver oil is also rich in astaxanthin, so it presents an attractive red luster. Astaxanthin can remove free radicals in the body, regulate and reduce the damage caused by photochemistry, and has a good therapeutic effect on skin cancer caused by ultraviolet rays. Astaxanthin has been widely developed and used in fo...

Claims

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Application Information

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IPC IPC(8): C11B3/00C11B3/12C11B3/02C11B3/16
Inventor 蔡胜利蔡爱英孙兆敏曲英英
Owner 威海博宇食品有限公司
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