Astilbin prepared by taking engelhardia roxburghiana leaves as raw material and preparation method of astilbin
A technology for astilbin and raw materials, which is applied in the field of astilbin and its preparation, can solve the problems of difficulty in realizing industrialized production, low purity of prepared products, complicated technical processes, etc., and achieves improved extraction rate and product purity, low cost, The effect of efficient extraction
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Embodiment 1
[0033] The method for preparing astilbin by taking Huang Qiye as raw material comprises the following steps:
[0034] (1) Crushing 500KG of dried leaves of Huangqi leaves into 1-2mm fragments; adding 2500L ethyl acetate to reflux for extraction 3 times, each time for 1.5 hours, and combining the extracts;
[0035] (2) Recover the ethyl acetate in the extract, add 500L of deionized water, drive out the remaining ethyl acetate in the extract, and form the water phase, carry out the first step of crystallization at 5°C, the crystallization time is 8h, and filter The crude product is obtained, with a wet weight of about 70KG;
[0036] (3) Dissolve the crude product with 420L of 50% ethanol, add 2.1KG of activated carbon powder after heating to 65°C in a water bath, stir for 3 minutes and then filter to obtain the filtrate;
[0037] (4) The filtrate is passed through a 1m AB-8 resin column, the flow rate is controlled at 1200L / h, and the column is washed with 1500L50% ethanol at a...
Embodiment 2
[0040] The method for preparing astilbin by taking Huang Qiye as raw material comprises the following steps:
[0041] (1) Crush 500KG of dried leaves of Huangqi leaves into 1-2mm pieces; add 3000L ethyl acetate and reflux to extract 3 times, each time for 2 hours, and combine the extracts;
[0042] (2) Recover the ethyl acetate in the extract, add 600L of deionized water, drive out the remaining ethyl acetate in the extract, and form the water phase, and carry out the first step of crystallization at a temperature of 6°C, the crystallization time is 7h, and filter The crude product is obtained, with a wet weight of about 70KG;
[0043] (3) Dissolve the crude product with 500L of 50% ethanol, add 2KG of activated carbon powder after heating to 60°C in a water bath, stir for 5 minutes and then filter to obtain the filtrate;
[0044] (4) Pass the filtrate through 1m 3 D101 resin column, the flow rate is controlled at 1300L / h, and the column is washed with 1500L 50% ethanol at a...
Embodiment 3
[0047] The method for preparing astilbin by taking Huang Qiye as raw material comprises the following steps:
[0048] (1) Crushing 500KG of dry leaves of Huangqi leaves into 1-2mm fragments; adding 2800L ethyl acetate to reflux for extraction 3 times, each time for 2.5 hours, and combining the extracts;
[0049](2) Recover the ethyl acetate in the extract, add 550L of deionized water, drive out the remaining ethyl acetate in the extract, and form a water phase, and carry out the first step of crystallization at a temperature of 7°C, the crystallization time is 6h, and filter The crude product is obtained, with a wet weight of about 70KG;
[0050] (3) Dissolve the crude product in 480L of 50% ethanol, add 2.4KG of activated carbon powder after heating to 62°C in a water bath, stir for 4 minutes and filter to obtain the filtrate;
[0051] (4) Pass the filtrate through 1m 3 AB-8 resin column, the flow rate is controlled at 1500L / h, and the column is washed with 1500L 50% ethano...
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