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
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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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