Method for extracting cyanidin from roselle

A technology of roselle and anthocyanin is applied in chemical instruments and methods, preparation of sugar derivatives, sugar derivatives, etc., to achieve the effects of simple equipment operation, high product quality and low energy consumption

Inactive Publication Date: 2016-05-25
CHANGSHA NATUREWAY BIOLOGICAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is exactly how to improve the yield in extracting anthocyanins...

Method used

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  • Method for extracting cyanidin from roselle
  • Method for extracting cyanidin from roselle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Weigh 300kg of roselle (the detected proanthocyanidin content is 7.81%), wash, dry, mechanically pulverize, and pass through a 100-mesh sieve to obtain roselle particles; add the roselle particles into the extraction tank, and add 3000L of deionized water for extraction , the extraction temperature is 50°C, and the extraction time is 8 hours; 2400L deionized water is added to the medicinal residue, the extraction temperature is 50°C, and the extraction time is 8 hours; the two extracts are combined; the extract is centrifugally filtered through a 50 μm disc centrifuge, Remove solid impurities and ash; remove macromolecular substances through 0.5-5μm hollow fiber membrane ultrafiltration, and obtain permeate with a molecular weight of less than 50,000; pass through a nanofiltration membrane with a molecular weight of 5000 to remove substances with a molecular weight greater than 5000. Obtain a permeate with a molecular weight of less than 5000; pass the permeate through a...

Embodiment 2

[0046] Weigh 400kg Roselle (proanthocyanidin content is 8.02% after detection), wash, dry, mechanically pulverize, pass through a 100 mesh sieve to obtain Roselle granules; add Roselle granules to the extraction tank, add 4000L deionized water for extraction , the extraction temperature is 45°C, and the extraction time is 12 hours; 3200L deionized water is added to the dregs, the extraction temperature is 45°C, and the extraction time is 12 hours; the two extracts are combined; the extract is centrifugally filtered through a 50 μm disc centrifuge, Remove solid impurities and ash; remove macromolecular substances through 0.5-5μm hollow fiber membrane ultrafiltration, and obtain permeate with a molecular weight of less than 50,000; pass through a nanofiltration membrane with a molecular weight of 5000 to remove substances with a molecular weight greater than 5000. Obtain a permeate with a molecular weight of less than 5000; pass the permeate through a disc-type tubular membrane, ...

Embodiment 3

[0048] Compared with Example 2, the difference is only that the steps are added: before ultrafiltration, first pass through an ultrafiltration organic membrane with a molecular weight cut-off of 100,000, discard the retentate; Filter the organic membrane interception and discard the retentate; before the disc tubular membrane filtration, the obtained permeate with a molecular weight of less than 5000 is intercepted by a disc plate membrane with a molecular weight cut-off of 200, and the retentate is retained.

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Abstract

The invention discloses a method for extracting cyanidin from roselle. The method comprises the following steps: cleaning roselle, drying, pulverizing, and screening with a 100-mesh screen; adding the roselle particles and deionized water into an extractor according to the material/liquid ratio of 1:8-1:12, and extracting twice to obtain an extracting solution; filtering the extracting solution with a centrifuge, and removing solid impurities to obtain a filtrate; carrying out ultrafiltration through a hollow fiber membrane; carrying out nanofiltration through a nanofiltration membrane; finally filtering and concentrating through a disk-type tubular organic membrane to obtain an extract; and carrying out freeze-drying on the extract to obtain the cyanidin product. The method obviously increases the yield of the cyanidin, enhances the purity of the cyanidin product, greatly lowers the conversion of cyanidin in the industrial production process, has the advantages of energy saving and consumption reduction, reduces the environmental pollution, and is beneficial to the proceeding of the factory production and the reduction of the production cost.

Description

technical field [0001] The invention relates to the technical field of chemical extraction, in particular to a method for extracting anthocyanins from roselle. Background technique [0002] Roselle (Hibiscus Sabdariffah,) is also known as Kakadi, roselle, roselle, mountain eggplant, etc. It is an annual shrub of Malvaceae Hawthorn. It was first produced in Africa and is a plant in tropical and subtropical arid regions. In my country, it is mainly distributed in Fujian, Taiwan, Hainan, Guangxi, Yunnan and other places. Roselle plant form is grass cotton, upright more than 1 meter high, with many branches, flowers open in summer and autumn, and the flowering period is long. Roselle is plump in appearance, purplish red and black, with bright color of melting water, slightly fragrant air, sour taste, and contains vitamin C, elderotrioside, citric acid and other nutrients. [0003] Anthocyanidin, also known as anthocyanidin, is a water-soluble natural pigment present in plants....

Claims

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Application Information

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IPC IPC(8): C07H17/065C07H1/08C09B61/00
CPCC07H1/08C07H17/065C09B61/00Y02P20/10
Inventor 李永旺王小宝张飞达匡惠
Owner CHANGSHA NATUREWAY BIOLOGICAL PROD
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