Method for extracting dihydrokavain from alpinia zerumbet leaves
A technology for dihydrobioxyn and an extraction method, which is applied in the field of natural product extraction, can solve the problems of cumbersome and time-consuming consumables, low yield, no extraction and separation method, etc., and achieves the effects of simple and environmentally friendly process and easy operation.
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Embodiment 1
[0032] Dihydropiperine is extracted from the leaves of Alpinia japonicus as follows:
[0033] With 2kg Yanshan Jiangye (taken from Lianhuan Township, Zhenfeng County, Guizhou Province) drying, crushing, adopt 20L 95% ethanol (solid-liquid ratio 1:20) to carry out reflux extraction (extraction temperature is 80 ℃) to the crushed Yanshanjiang leaf , the extraction time is 2h), reflux extraction 2 times, after the reflux extraction is finished, remove the dregs by filtration to obtain the extract, concentrate the extract under reduced pressure to 1 / 5 of the total volume, add 20g of activated carbon to remove the pigment, and obtain the pigment-removed The concentrated solution was concentrated under reduced pressure, and ethanol was recovered to obtain extract A84g. The extract A was extracted 3 times with ethyl acetate, and the amount of ethyl acetate in each extraction was 5000 mL. The combined extracts were collected and concentrated under reduced pressure to obtain 49 g of ex...
Embodiment 2
[0037]With 2kg Yanshan Jiangye (taken from Lianhuan Township, Zhenfeng County, Guizhou Province) drying, crushing, adopt 20L 95% ethanol (solid-liquid ratio 1:20) to carry out reflux extraction (extraction temperature is 80 ℃) to the crushed Yanshanjiang leaf , the extraction time is 2h), reflux extraction 3 times, after the reflux extraction is finished, remove the dregs by filtration to obtain the extract, concentrate the extract under reduced pressure to 1 / 5 of the total volume, add 20g of activated carbon to remove the pigment, and obtain the pigment-removed The concentrated solution was concentrated under reduced pressure, and the ethanol was recovered to obtain 93g of extract A. The extract A was extracted three times with chloroform, and the amount of chloroform used in each extraction was 5000 mL. The combined extracts were collected and concentrated under reduced pressure to obtain 45 g of extract B. Add the mixed solution of 150mL chloroform and methanol (the volume ...
Embodiment 3
[0039] Dry and pulverize 2kg of Zingiber officinale (taken from Lianhuan Township, Zhenfeng County, Guizhou Province), and use 20L of methanol (solid-to-liquid ratio 1:20) to reflux extract the crushed Zingiber officinale (extraction temperature is 70°C, extract The time is 2h), reflux extraction 3 times, after the reflux extraction is completed, remove the dregs by filtration to obtain the extract, concentrate the extract under reduced pressure to 1 / 5 of the total volume, add 20g of activated carbon to remove the pigment, and obtain the concentrated liquid, the concentrated solution was concentrated under reduced pressure, methanol was recovered, and 71 g of extract A was obtained. The extract A was extracted 3 times with chloroform, and the amount of chloroform used in each extraction was 5000 mL. The combined extracts were collected and concentrated under reduced pressure to obtain 36 g of extract B. In extract B, add the mixed solution of 150mL chloroform and methanol (the...
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