Method for extracting natural pigment from persimmon peels

A technology of natural pigments and persimmon skins, applied in natural dyes, chemical instruments and methods, azo dyes, etc., can solve the problems of unsuitability for industrial scale production, long extraction time, and large amount of solvent, so as to reduce production costs and improve Pure, easy-to-use results

Inactive Publication Date: 2013-04-03
桂林普兰德生物科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"Persimmon skin is rich in natural pigments. At present, there are reports to extract pigments from persimmon peels by soaking, percolation and other methods, but these methods take a long time to extract, use a large amount of solvent, and have a low extraction rate, which is not suitable for industrial scale production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 100kg of persimmon skin and put it into the countercurrent extractor, heat 600L of 60% ethanol in the liquid storage tank, use a pump to input the ethanol into the instant heater (pure water is heated to 70-80°C) and heat it to the centella in the extraction tank During the extraction process, the temperature in the extraction tank was controlled at 70-80°C, and the extraction liquid was released after 90 minutes of extraction; 600L of 60% ethanol was added to the extraction tank for the second countercurrent extraction, and the temperature in the extraction tank was controlled at 70 Extract at -80°C for 90 minutes, release the extract; add 600L of 60% ethanol to the extraction tank for the third countercurrent extraction, control the temperature in the extraction tank at 70-80°C, extract for 90 minutes, release the extract; combine the extracts and concentrate Ethanol was recovered to obtain 400 L of persimmon peel concentrate. Filter the persimmon skin concentra...

Embodiment 2

[0019] Weigh 100kg of persimmon skin and put it into the countercurrent extractor, heat 600L of 60% methanol in the liquid storage tank, and use the pump to input the ethanol into the instant heater (pure water is heated to 70-80°C) and heat the centella in the extraction tank During the extraction process, the temperature in the extraction tank was controlled at 70-80°C, extracted for 90 minutes, and the extract was released; 600L of 60% methanol was added to the extraction tank for the second countercurrent extraction, and the temperature in the extraction tank was controlled at 70 Extract at -80°C for 90 minutes, release the extract; add 600L of 60% methanol to the extraction tank for the third countercurrent extraction, control the temperature in the extraction tank at 70-80°C, extract for 90 minutes, release the extract; combine the extracts and concentrate Methanol was recovered to obtain 400 L of persimmon peel concentrate. Filter the persimmon skin concentrate through ...

Embodiment 3

[0021] Weigh 100kg of persimmon skin and put it into the countercurrent extractor, heat 600L saturated n-butanol in the liquid storage tank, and use a pump to input ethanol into the instant heater (pure water is heated to 70-80°C) and heat the product in the extraction tank The raw material of Snow Grass is subjected to countercurrent extraction. During the extraction process, the temperature in the extraction tank is controlled at 70-80 °C, the extraction is 90 minutes, and the extract is released; 600L saturated n-butanol is added to the extraction tank for the second countercurrent extraction, and the extraction tank Control the temperature at 70-80°C, extract for 90 minutes, and release the extract; add 600L saturated n-butanol to the extraction tank for the third countercurrent extraction, control the temperature in the extraction tank at 70-80°C, extract for 90 minutes, and release the extract Combine the extracts, concentrate and recover n-butanol, add water to obtain 40...

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PUM

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Abstract

The invention discloses a method for extracting natural pigment from persimmon peels. The method comprises the steps of taking peels obtained during the dried persimmon production as the raw material, extracting and separating the persimmon peel pigment by utilizing countercurrent and macroporous adsorption resin, wherein during the countercurrent extraction, a heated solvent is adopted for carrying out reverse extraction on the persimmon peel raw material, so that the concentration difference of the solvent is formed in the flowing process, the solvent can also be in full contact with medicines, the leaching of active ingredients is benefited and the reverse flowing plays a role of fully stirring in the extracting process at the same time; and by utilizing the macroporous adsorption resin, natural pigment ingredients can be selectively adsorbed, the production is simple and easy to control and high-content natural pigment can be separated. The method disclosed by the invention is easy to operate and little in investment and has the advantages that by adopting efficient and energy saving countercurrent extraction technology, the natural pigment of the persimmon peels is fully extracted by using small-times amount solvent and short extraction time; shortcomings of long extraction time, large solvent times amount, low extraction rate of extraction modes such as percolation and soaking are overcome; the extract purity is increased; and the production cost is reduced.

Description

technical field [0001] The invention relates to a method for extracting natural pigment from persimmon skin. Background technique [0002] Food coloring is the main component of food additives. It is not only widely used in the food industry to improve the color of food and increase people's enjoyment of beauty, but also widely used in the pharmaceutical and cosmetic industries to increase the external quality of products. Synthetic pigments are limited in use due to their low safety. Therefore, the development of pigments extracted from edible animals and plants has attracted more and more attention. [0003] The persimmon skin is the pericarp of the dicotyledonous plant Persimmonaceae persimmon [Diospyros Kaki L.f]. Persimmon trees have been cultivated for more than a thousand years. Zhang Zhongshu, a poet in the Northern Song Dynasty, called persimmons beautiful: "The taste is better than Hualin Fangdi, the color is also Yangjing Shenzhu, and the light and even crimson ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C09B67/54
Inventor 刘樟艳吕光政黄秋洁梁昌祥彭军
Owner 桂林普兰德生物科技有限公司
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