Study on the Preparation of Gallic Acid by Hydrolysis of Tannin
Liu Yinzhong Wu Bin Li Guang Fen(Zunyi LiYuan Chemical Co., Ltd.,Guizhou 563004)$$$$
The effects of used sulfuric acid amount,reaction temperature and time etc. on the preparation of gallic acid by the hydrolysis of tannin were investigated through experiments.The results showed that the conversion ratio of tannin could reach about 100% under reaction temperature 110℃ for 4 hours and a molar reactant ratio of 12∶1(15Baume tannin∶sulfuric acid)with light colour gallic acid crystalline.
【CateGory Index】： TQ245