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Method for extracting astaxanthin from haematococcus pluvialis

A technology of Haematococcus pluvialis and astaxanthin, which is applied in the production of bulk chemicals and organic chemistry, can solve the problems of solvent residues in extracts, complicated processes, and environmental pollution, and achieves convenient operation, simple extraction methods, and avoids The effect of pyrolysis

Inactive Publication Date: 2010-04-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Guo Wenjing and others have studied the process of extracting astaxanthin from Haematococcus pluvialis by ultra-high pressure method. The transfer rate of astaxanthin in Haematococcus pluvialis can reach 98%, but the ultra-high pressure of 300MPa is difficult to achieve the conditions of industrial application (agricultural Acta Mechanica Sinica, Issue 5, 2008)
[0006]The traditional extraction methods of astaxanthin include solvent extraction, microwave extraction, enzyme extraction, ultra-high pressure extraction, etc. However, these methods exist in the extract There are solvent residues, environmental pollution, complex process and other disadvantages

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 100 g of pulverized Haematococcus pluvialis powder, place it in the extraction kettle of a 1L supercritical extraction device (HA220-50-06 type), set the temperature of the extraction kettle to 40°C, and the pressure to be 30MPa. CO 2 The flow rate is 20L / h, the temperature and pressure of the separation tank I are 35°C and 10MPa respectively, the temperature of the separation tank II is 40°C, and the CO 2 The flow rate of the fluid is 20-40L / h, and the continuous dynamic extraction time is 2.5h. The extract is discharged from the separation tank irregularly, collected and stored in a container, and the extract is a dark red viscous substance. Weighed to obtain a total of 8.0 g of extract, with an extraction rate of 8.0%.

Embodiment 2

[0020] Referring to Example 1, weigh 100g of Haematococcus pluvialis powder, place it in a 1L extraction kettle, set the extraction parameters, the temperature of the extraction kettle is 50°C, the pressure is 20MPa, CO 2 The flow rate is 25L / h, the temperature of the separation tank I is 35°C, the pressure is 9MPa, the temperature of the separation tank II is 40°C, and the continuous dynamic extraction is 2.5h. After the extraction, a dark red viscous substance is separated from the separation tank. Weighed to obtain a total of 6.8g of extract, with an extraction rate of 6.8%.

Embodiment 3

[0022] Referring to Example 1, weigh 100 g of Haematococcus pluvialis powder, place it in a 1L extraction kettle, set the extraction parameters, the temperature of the extraction kettle is 40°C, the pressure is 25MPa, CO 2 The flow rate is 20L / h, the temperature of the separation tank I is 30-35°C, the pressure is 8MPa, the temperature of the separation tank II is 35-40°C, and the continuous dynamic extraction is 3h. After the extraction, it is separated from the separation tank to obtain dark red viscous shape substance. Weighed to obtain a total of 7.4g of extract, with an extraction rate of 7.4%.

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Abstract

The invention provides a method for extracting astaxanthin from haematococcus pluvialis. Astaxanthin is extracted by adopting above-critical CO2 extracting process. The temperature of an extracting kettle is ranged from 30 to 50 DEG C and the pressure is ranged from 20 to 30 MPa. Flowing speed of CO2 fluid is 20 to 40 L / h and the extracting time is 2 to 4 h. The astaxanthin has strongest inoxidizability and is easy to be oxidized. The extracting method of the invention is simple, rapid and convenient to operate. CO2 is used as the extraction solvent in extraction process, so the production process is environment-friendly and the extraction has no organic solvent residue. The temperature during extraction process is low for efficiently avoiding active substance to decompose at high temperature. The acquired astaxanthin extraction is bolarious pasty substance and can be used as materials for developing health-care food or officinal component.

Description

technical field [0001] The invention belongs to extraction and processing methods of natural products, and mainly relates to a method for supercritical extraction of astaxanthin from Haematococcus pluvialis. Background technique [0002] Astaxanthin (also known as astaxanthin) is a red pigment with a chemical structure similar to beta-carotene. Astaxanthin is a member of the carotenoid group and the highest level of carotenoid synthesis. β-carotene, lutein, canthaxanthin, and lycopene are all intermediate products of carotenoid synthesis, so in nature, astaxanthin has the strongest antioxidant activity. Studies have found that astaxanthin has important physiological functions. Its antioxidant capacity is 550 times that of vitamin E and 10 times that of β-carotenoids. It can more effectively prevent the peroxidation of unsaturated fatty acids. In addition, astaxanthin also has a variety of physiological effects such as inhibiting tumor growth, enhancing immune function, and...

Claims

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Application Information

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IPC IPC(8): C07C403/24
CPCY02P20/54
Inventor 王龙虎刘雪松陈勇陈杨胜栾连军
Owner ZHEJIANG UNIV
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