Process for producing gallic acid with gall flower extract and one-step method
A gallic acid and process technology, applied in the field of gallic acid production, can solve the problems of low purity, high raw material requirements, undetermined ratio of hydrolyzed materials, temperature and time conditions, and acidification conditions, etc.
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Embodiment 1
[0009] Embodiment 1: take by weighing 100 grams of beihua, pulverize, add 500 grams of water and 200 grams of 30% sodium chloride solution, be heated to 100 ° C, hydrolyzed for 2 hours, and the active ingredients of beihua are converted into gallate; hydrolyzate; Transfer to the acidification tank for acidification with hydrochloric acid to make the PH of the hydrolyzate = 2~3; after acidification, the plate and frame are separated directly, the separated material liquid is transferred to the decolorization tank, and 4 grams of activated carbon are added to decolorize at 85 ° C for 30 to 60 minutes, and plate again. Frame pressure filtration, the feed liquid is removed from the crude crystallizing tank for crystallization for 24 hours, decolorized and separated to obtain 32.6 g of crude gallic acid, the gallic acid content is 95.7%, and the product yield is 30.97%.
Embodiment 2
[0010] Embodiment 2: take by weighing 200 grams of beihua, pulverize, add 1200 grams of water and 300 grams of 30% sodium chloride solution, be heated to 102 ° C, hydrolyzed for 2 hours, and the active ingredient of beihua is converted into gallate; hydrolyzed solution Transfer to the acidification tank for acidification with hydrochloric acid, so that the PH of the hydrolyzate is 2 to 3; after acidification, the plate and frame are separated directly, the separated material liquid is transferred to the decolorization tank, and 9 grams of activated carbon are added to decolorize at 85 ° C for 30 to 60 minutes, and plate again. Frame pressure filtration, the feed liquid is removed from the crude crystallizing tank for crystallization for 24 hours, decolorized and separated to obtain 62.8 grams of crude gallic acid, the content of gallic acid is 95.2%, and the product yield is 29.8%; the crude gallic acid product is qualified and then decolorized and refined in the refining worksh...
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