Method for preparing high-purity magnolol and magnolol
A technology of honokiol and magnolol, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of loss of honokiol and honokiol, corrosion of equipment, difficulty in popularization, etc. Achieve the effect of simple equipment, large processing capacity and favorable follow-up processing
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Embodiment 1
[0029] Weigh 400g of Magnolia officinalis bark powder, extract four times at 55°C, add 2400ml of petroleum ether for extraction for 1.5 hours each time, combine the four extracts and concentrate under reduced pressure to obtain extract 19.23, add 200mL of ethanol solution to the extract, and then add 100Lm A large amount of precipitation was produced in water, filtered, and the filtrate was concentrated under reduced pressure to obtain 9.7g of extract, left to stand overnight, dissolved and filtered with petroleum ether to obtain 1.87g of magnolol crude crystals, the filtrate was added with an equal volume of ethanol aqueous solution to extract the petroleum ether solution 4 times , concentrate the aqueous ethanol until solids are precipitated, then add petroleum ether to dissolve and filter to obtain 2.7 g of honokiol crude crystals; add an equal volume of aqueous ethanol to extract the petroleum ether solution for 5 times, then concentrate the aqueous ethanol until solids are ...
Embodiment 2
[0031] Weigh 400g of Magnolia officinalis bark powder, extract four times at 60°C, add 2400ml of cyclohexane for extraction for 1 hour each time, combine the four extracts and concentrate under reduced pressure to obtain 20.94g of extract, add 300mL of ethanol solution to the extract, Add 150Lm of water to produce a large amount of precipitation, filter, and concentrate the filtrate under reduced pressure to obtain 9.37g of extract, let stand overnight, add petroleum ether to dissolve and filter to obtain 2.3g of magnolol crude crystals, add an equal volume of ethanol aqueous solution to the filtrate to extract petroleum ether solution 4 times, concentrate the aqueous ethanol solution until solids are precipitated, then add petroleum ether to dissolve and filter to obtain 3.0 g of honokiol crude crystals; add an equal volume of aqueous ethanol to extract the petroleum ether solution 5 times, then concentrate the aqueous ethanol solution until there are solids Precipitate, then ...
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