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Method for preparing antarctic krill oil with high astaxanthin content by using two-step method

A technology for Antarctic krill oil and Antarctic krill meal, which is applied in the production of fat/fat, fat production, etc., can solve the problems of less refining, difficult mass production, and high cost, so as to reduce production costs, enhance competitive advantages, and improve The effect of sensory quality

Inactive Publication Date: 2018-12-14
LUHUA BIOMARINE SHANDONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reagents used in some prior art have high toxicity, which is not conducive to the actual production in the workshop; The quality index of Antarctic krill oil does not take into account the content of astaxanthin and phospholipid at the same time. The obtained krill oil does not meet the relevant national quality requirements and cannot be directly sold; the raw materials used in some existing technologies are fresh Antarctic krill, which is difficult to keep fresh , the pretreatment of raw materials is troublesome, the cost is high, and it is not easy to produce on a large scale; most of the krill oil obtained in the prior art is crude oil, which is rarely refined, and the sensory quality of the crude oil is not good, which is not conducive to subsequent production and sales; Technology seldom mentions the subsequent treatment of shrimp meal residue after extraction, resulting in low utilization rate of shrimp meal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1, the preparation of high astaxanthin Antarctic krill oil

[0036] S1. Use the first solvent (98% ethanol) to carry out the first stage extraction of Antarctic krill powder, the ratio of solid to liquid (mass ratio) is 1:3, soak the shrimp powder at 20°C for 60 minutes, and continuously carry out the extraction process. The liquid was stirred (at a speed of 400rpm), and filtered immediately after the stirring was completed, and the first-grade extracted Antarctic krill powder (without drying treatment, the powder contained a solvent content≤10%) and the filtrate were obtained after the filtration. The filtrate is desolvated under reduced pressure at 60°C and -0.07MPa vacuum until the solvent is completely removed. The crude oil obtained here is subjected to alcohol precipitation: the crude oil is dissolved in absolute ethanol with 5 times the mass multiple, and the obtained solution is filtered. , the filtrate was desolvated to dryness under reduced pressure...

Embodiment 2

[0040] Embodiment 2, the preparation of high astaxanthin Antarctic krill oil

[0041] S1. Use the first solvent (99% ethanol) to carry out the first stage extraction of Antarctic krill powder, the ratio of solid to liquid (mass ratio) is 1:3, soak the shrimp powder at 20°C for 60 minutes, and continue to extract the powder during the extraction process. The liquid was stirred (200rpm), and filtered immediately after the stirring was completed, and the first-grade extracted Antarctic krill powder (without drying treatment, the powder contained a solvent content≤10%) and the filtrate were obtained after the filtration. The filtrate is desolvated under reduced pressure at 50°C and -0.01MPa vacuum until the solvent is completely removed. The crude oil obtained here is subjected to alcohol precipitation: the crude oil is dissolved in absolute ethanol with 3 times the mass multiple, and the obtained solution is filtered. , the filtrate is desolvated to dryness under reduced pressure...

Embodiment 3

[0045] Embodiment 3, the preparation of high astaxanthin Antarctic krill oil

[0046] S1. Use the first solvent (absolute ethanol) to extract the Antarctic krill powder in the first stage, the ratio of solid to liquid (mass ratio) is 1:3, soak the shrimp powder at 20°C for 60 minutes, and continue to extract the powder during the extraction process. The liquid was stirred (800rpm), and filtered immediately after the stirring was completed, and the first-grade extracted Antarctic krill powder (without drying treatment, the powder contained a solvent content≤10%) and the filtrate were obtained after the filtration. The filtrate is desolvated under reduced pressure at 70°C and -0.05MPa vacuum until the solvent is completely removed. The crude oil obtained here is subjected to alcohol precipitation: the crude oil is dissolved in absolute ethanol with 5 times the mass multiple, and the obtained solution is filtered. , where the filtrate is desolvated to dryness under reduced pressu...

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Abstract

The invention discloses a method for preparing antarctic krill oil with high astaxanthin content by using a two-step method. According to the method, astaxanthin and phospholipid in shrimp meal are effectively leached by using the double-solvent two-step extraction method, and the leaching rate of effective components in the shrimp powder can be improved. The method disclosed by the invention is used for carrying out targeted extraction on raw material antarctic krill meal, two kinds of antarctic krill oil are obtained, and the phospholipid content of the two kinds of antarctic krill oil accords with relevant national standards. The antarctic krill oil extracted by a first step is subjected to alcohol precipitation and refining, the quality is excellent (the phospholipid content is largerthan or equal to 42g / 100g and the astaxanthin content is larger than or equal to 500 mg / kg), the sensory quality, liquidity and light transmission of an antarctic krill oil product are improved, and the antarctic krill oil product can be directly produced and sold. Particularly, the antarctic krill oil obtained in a second step is high-astaxanthin antarctic krill oil (the astaxanthin content is larger than or equal to 1000 mg / kg), and the high-astaxanthin antarctic krill oil can be used as a special antarctic krill oil for promotion and selling, and the competitive advantage of the products isimproved.

Description

technical field [0001] The invention relates to the field of krill oil preparation, in particular to a two-step method for preparing Antarctic krill oil with high astaxanthin content. Background technique [0002] Antarctic krill belongs to crustaceans. There are about 85 species of krill in the global ocean, and about 7 to 8 species of krill are distributed in the Antarctic waters south of 50 degrees south latitude, so they are named Antarctic krill. Its body length is 5.5-6.0cm, its life span is 5-7 years, its weight is about 2g, its trunk is transparent, and its reproductive ability is strong. In the Antarctic waters, the biomass of Antarctic krill is about 342-536 million tons, which is the largest biological resource of a single species in the world. Antarctic krill is rich in nutrients, including protein, lipids, antioxidant substances, such as astaxanthin, flavonoids, and vitamins A and E. [0003] Lipid components in Antarctic krill oil mainly include phospholipids...

Claims

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Application Information

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IPC IPC(8): C11B1/10
CPCC11B1/10
Inventor 徐晓斌甄方卉范宁宁宗俊刘建志
Owner LUHUA BIOMARINE SHANDONG CO LTD