Preparation of ellagic acid from Tara Tannin oxidation by liquid-air jet

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Abstract In order to solve the problem of scarce raw materials of gallnut tannin, Tara powder was used as raw material to prepare ellagic acid and liquid-air jet technology was used to oxidize Tara Tannin solution. The purification process of ellagic acid was explored. Samples were detected and analyzed by high performance liquid chromatograph, ultraviolet visible spectrophotometer, Fourier transform infrared spectrometer, and synchronous thermal analyzer. The results show that, the better technological conditions for the preparation of ellagic acid from Tara powder are: Tara Tannin solution is obtained by water extraction, the Tara Tannin concentration is 30 g·L^-1, the pH of the reaction solution is adjusted with 12% NaOH to be 8.5, the reaction temperature is 30 ℃, the reaction time is 6 h. Under this condition, the yield and mass fraction of ellagic acid were 44.58% and 88.69% after alkali soluble acid precipitation. Solvent washing method was used to purify ellagic acid samples after alkali dissolution and acid precipitation. At this time, the yield of ellagic acid was 61.70% and with a mass fraction of 94.69%. The preparation method greatly shortens the reaction time and has a high mass fraction.

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	LI Ruijun
	XU Juan
	ZHANG Hong
	LIU Lanxiang
	MA Jinju
	ZHANG Jiayan

Keywords： Tara Tara Tannin ellagic acid liquid-air jet

Received 2022-06-14;

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LI Ruijun, XU Juan, ZHANG Hong, LIU Lanxiang, MA Jinju, ZHANG Jiayan.Preparation of ellagic acid from Tara Tannin oxidation by liquid-air jet[J] Chemcial Industry and Engineering, 2024,V41(1): 40-46

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