Krill oil extraction method

An extraction method, krill oil technology, applied in the direction of fat oil/fat production, fat oil/fat refining, fat production, etc., can solve the problems of high purification technology requirements, complex extraction components, low phospholipid content, etc., to achieve good refining effect, Reasonable content of polar components, effect of high content of polar components

Active Publication Date: 2020-11-03
赵福江
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the production at home and abroad is prepared by the traditional ethanol process, and the ethanol extraction technology is relatively mature. The advantage of this process is that it is relatively safe to use edible alcohol as a solvent, but the disadvantage is that the extraction components are complicated, and the purification technology requirements are relatively high. The cost is caused by the large amount of ethanol. higher
Others such as supercritical extraction technology have defects such as high cost and low phospholipid content

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Extraction method of krill oil:

[0032] S1: Take a certain amount of krill meal and put it in a 120-mesh nylon cloth bag, tie the mouth tightly, put it into the subcritical extraction kettle (tank), seal the tank mouth, and close all the exhaust valves, feed valves, and discharge valves of the equipment Wait, when the vacuum pump is turned on to vacuum -0.1MPa, the valve between the extraction kettle (tank) and the evaporation kettle (tank) is closed, and the vacuum pump is closed; open the solvent feed valve, and add a solvent 2-6 times the weight of the krill meal. When the solvent reaches half the amount of krill meal, close the solvent feed valve, add 5-20wt% entrainer by weight of krill meal through the entrainer feed device, close the entrainer feed valve, reopen the solvent feed valve, the solvent must be Drift over the shrimp meal (the total weight of solvent added is more than 2 times the weight of the krill meal). The extraction conditions are: ex...

Embodiment 2

[0058] Get the krill oil product of sample 3 in above-mentioned embodiment 1, utilize molecular distillation equipment to carry out the process of its secondary purification, the process of molecular distillation comprises:

[0059] (1) Close all valves of molecular distillation equipment, open vacuum pump, heater, cooling water, etc.

[0060] (2) When the system reaches a certain degree of vacuum (50-170pa) and the evaporator reaches a certain temperature (80-200℃), add the krill oil to the feeder.

[0061] (3) Open the feeding valve, adjust the feeding speed, and start distillation. When the vacuum degree rises to 120-130pa, 800g of oil is distilled for 30-60 minutes.

[0062] (4) When all the materials are processed, turn off the vacuum pump, heater, circulating water, and open the vent valve to the normal pressure state.

[0063] (5) Open the discharge valves of heavy molecule and light molecule collectors respectively to collect heavy molecule krill oil, light molecule o...

Embodiment 3

[0082] This embodiment continues the process of concentrating the krill oil after the secondary purification of sample 3 in Example 2, using the method of carbon dioxide supercritical distillation to concentrate the krill oil, and the concentration conditions are: the concentration temperature is 25~35 ℃ , the concentration pressure is 15~20Mpa; The temperature of separation still I is 35~45 ℃, and the pressure of separation still I is 8~10Mpa; The temperature of separation still II is 30~40 ℃, and the pressure of separation still II is 6~10Mpa; The concentration time is 2-6 hours. After the concentration, heavy oil, light oil and small molecular impurities are obtained respectively.

[0083] Specifically, the flow rate of carbon dioxide is controlled at 30-40 L / hour during the concentration process.

[0084] The specific implementation conditions are as follows:

[0085] The specific implementation conditions of table 7 embodiment 3

[0086]

[0087] Characterization: ...

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Abstract

The invention provides a krill oil extraction method, which comprises: under a subcritical extraction condition, extracting polar lipids and non-polar lipids in a raw material by using a mixed solvent, the mixed solvent comprising a solvent with a use amount more than 2 times the use amount of the raw material and an entrainer with a use amount of 5-20 wt% of the use amount of the raw material, wherein the subcritical extraction conditions are as follows: the extraction temperature is 30-70 DEG C, and the extraction pressure is 0.3-1.2 MPa. The krill oil prepared by the preparation method is high and reasonable in polar component content, the oil extraction rate of the raw materials reaches 95% or above of total oil of the raw materials, DHA / EPA is greater than or equal to 26%, the phospholipid content is 42-85%, astaxanthin is greater than or equal to 500 ppm, the color is uniform and consistent, the taste is good, and the smell is pure with fishy smell or other foreign smells exist;moreover, the preparation process is simple, the refining effect is good, the purity is high, the yield is relatively high, no pollution is caused, and the direct production cost is low and is only 60-70% of that of an ethanol process.

Description

technical field [0001] The application belongs to the technical field of krill oil extraction, and in particular relates to a krill oil extraction method. Background technique [0002] Antarctic krill oil is a high-tech, high-value-added industry with mature process technology, huge development potential, good market prospects, strong vitality and market competitiveness, and meets the country's industrial structure and product structure adjustment. , is a marine development industry supported by the state. [0003] With the continuous improvement of the development level, the application scope of krill oil is gradually expanding to the field of biomedicine, such as blood lipid lowering, joint disease treatment, brain health, metabolic disease, dysmenorrhea relief and anti-aging, etc. Currently, some countries in Europe and America are conducting clinical trials previous research. Dr. Wael Massrieh's research shows that Antarctic krill oil is rich in omega-3 fatty acids, wh...

Claims

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Application Information

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IPC IPC(8): C11B1/10C11B3/00
CPCC11B1/10C11B1/108C11B3/001Y02P20/54
Inventor 赵福江薛长湖徐晓斌姜晓明范宁宁
Owner 赵福江
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