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Fractional extraction method of aloe polysaccharide

A technology of aloe polysaccharides and graded extraction, which is applied in the field of plant extraction, can solve the problems of no industrialized production, difficult graded extraction, and high extraction cost, and achieve the effects of cost saving, good original activity, and alcohol consumption

Active Publication Date: 2007-04-18
云南万绿生物股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to perform fractional extraction using conventional solvent extraction methods, and the extraction cost is too high
In the laboratory, traditional methods often use ethanol precipitation to extract crude polysaccharides from aloe vera, and then separate them through dextran gel, but there is no report on industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. Take 10 tons of decolorized aloe vera gel 10:1 concentrated solution, add 90 tons of 95% ethanol, stir at room temperature for 30 minutes, and let stand for 3 hours;

[0018] 2. Filtrate, recover ethanol, collect the crude polysaccharide of aloe, add 10 tons of purified water, stir for 15 minutes, filter after making it dissolve, and obtain the crude polysaccharide solution of aloe;

[0019] 3, the above-mentioned 10 tons of crude polysaccharide aqueous solution of aloe is crossed the ultrafiltration membrane (being UF film) of 200000 molecular weight cut-off to carry out ultrafiltration, after concentrating 20 times, obtain 500 kilograms of concentrated solutions (retentate), this concentrated solution is filtered by nanofiltration After the film is concentrated by 5 times, 100 kg of a concentrated solution with an average molecular weight of more than 200,000 is obtained. After freeze-drying, 6 kg of aloe polysaccharide freeze-dried powder with an average molecular ...

Embodiment 2

[0024] 1. Take 10 tons of decolorized aloe vera gel 4:1 concentrated solution, add 80 tons of 95% ethanol, stir at room temperature for 60 minutes, and let stand for 2 hours;

[0025] 2. Filtrate, recover ethanol, collect aloe crude polysaccharide, add 20 tons of pure water, stir for 30 minutes, filter after making it dissolve, and obtain aloe crude polysaccharide aqueous solution;

[0026] 3. The above-mentioned 20 tons of aloe crude polysaccharide aqueous solution is passed through an ultrafiltration membrane with a molecular weight cut-off of 200,000 for ultrafiltration. After concentrating 30 times, 666 kilograms of concentrated solution (retentate) is obtained. After the concentrated solution is concentrated 10 times with a nanofiltration membrane , to obtain 66.6 kilograms of a concentrated solution with an average molecular weight of more than 200,000, after freeze-drying, to obtain aloe polysaccharide freeze-dried powder with an average molecular weight of more than 200...

Embodiment 3

[0031] 1. Take 10 tons of unbleached whole-leaf aloe vera 10:1 concentrated juice, add 100 tons of 95% ethanol, stir at room temperature for 45 minutes, and let stand for 1 hour;

[0032] 2. Filtrate, recover ethanol, collect aloe crude polysaccharide, add 15 tons of pure water, stir for 20 minutes, filter after making it dissolve, and obtain aloe crude polysaccharide aqueous solution;

[0033] 3, the ultrafiltration membrane that above-mentioned 15 tons of aloe thick polysaccharide aqueous solution is crossed molecular weight cut-off is 200000 is carried out ultrafiltration, after concentrating 10 times, obtain 1500 kilograms of concentrated solutions (retentate), after this concentrated solution is concentrated 8 times with nanofiltration membrane , obtain 187.5 kilograms of concentrated solution with an average molecular weight of more than 200,000, after freeze-drying, obtain the freeze-dried powder of aloe polysaccharide with an average molecular weight of more than 200,00...

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Abstract

This invention provides a fractional extraction method of aloe polysaccharides, it adds 8-10 times of 95% alcohol into concentrated aloe product, standing and precipitating after mixing, then filtering, reclaiming alcohol, collecting aloes crude polysaccharide, after adding water and mixing to dissolve, gradually passing the ultrafiltration membrane whose molecular cut off is 200000-4000, then passing nano-filter membrane to concentrate, getting aloes polysaccharides of different molecular weight.

Description

technical field [0001] The invention relates to a plant extraction method, in particular to a method for fractionally extracting aloe polysaccharides from concentrated aloe products. Background technique [0002] Aloe polysaccharide is an important raw material in medicine, chemical industry, and food. Aloe polysaccharides in different molecular weight ranges have different functions. Due to the low content of soluble solids in aloe, the content of aloe polysaccharides in soluble solids is also low, only about 10%, and after the aloe polysaccharides are graded and extracted, the content of each level is different, and the molecular weight distribution of aloe polysaccharides is wide , the physical and chemical properties are very similar, therefore, when the chemical method in the prior art is used to extract aloe polysaccharides fractionally, the structure and biological activity of the aloe polysaccharides are often destroyed due to heat or other chemical effects. It is d...

Claims

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Application Information

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IPC IPC(8): C08B37/00
Inventor 周治德罗秉俊苏卫明
Owner 云南万绿生物股份有限公司
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