Method for recovering and extracting tannic acid from acer truncatum seed meal
A technology of ingot maple seeds and tannic acid, applied in chemical instruments and methods, preparation of sugar derivatives, sugar derivatives, etc., can solve the problems of small application range, high toxicity, cumbersome steps, etc., and achieve strong operability, The effect of low cost and simple process
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[0025] Example 1:
[0026] 1. Crude extraction: Weigh 50g of Acer truncatum seed meal, use 250mL 40% acetone, 250mL 60% acetone and 250mL 100% acetone in sequence, and extract separately on a water bath shaker. The liquid ratio is 1:5, the temperature is 60°C, pH=2, repeat 3 times and then filter, combine the filtrate and concentrate to obtain the crude tannic acid extract;
[0027] 2. Impurity removal: add 1 volume of ethyl acetate and water to the crude tannic acid extract in step 1) in sequence, wherein the volume ratio of ethyl acetate to water is 1:1. Then use methanol solution containing 4% hydrochloric acid for fractional extraction, filter, combine the filtrate and concentrate to obtain tannic acid extract;
[0028] 3. Purification: Dilute the tannic acid extract obtained in step 2) with distilled water to a tannic acid concentration of 0.1g / mL, and measure pH=4, while NKA- Fill the column with macroporous resin, and balance with distilled water with pH=4. Load the diluted ...
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[0029] Example 2:
[0030] 1. Crude extraction: Weigh 50g of Acer truncatum seed meal, use 400mL 40% ethanol, 400mL 60% ethanol and 400mL 100% ethanol in sequence, and extract twice on a water bath shaker. Among them, each time Acer truncatum seed meal and each concentration of acetone The material-to-liquid ratio is 1:7, the temperature is 65°C, pH=3, repeat 3 times and then filter, combine the filtrate and concentrate to obtain the crude tannic acid extract;
[0031] 2. Impurity removal: Add 1 volume of ethyl acetate and 1 volume of water to the crude tannic acid extract in step 1), and then use 1 volume of methanol solution containing 4% hydrochloric acid for fractional extraction , Filter, combine the filtrate and concentrate to obtain tannic acid extract;
[0032] 3. Purification: Dilute the tannic acid extract obtained in step 2) with distilled water to a tannic acid concentration of 0.3g / mL, and measure pH=2, while NKA- Fill the column with macroporous resin, then balance wi...
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