Welcome to Chemistry and Industry of Forest Products,

›› 2008, Vol. 28 ›› Issue (6): 79-82.

• 研究报告 • Previous Articles     Next Articles


XU Hao1, ZHANG Zong-he1, ZHONG Chong-mao2, QIN Qing1, TAO Lin2, WANG Guang-hui1   

  1. 1. Institute of Chemical Industry of Forestry Products, CAF;Key and Open Lab.on Forest Chemical Engineering, SFA, Nanjing 210042, China;2. Nanjing Longyuan Natural Polyphenol Synthesis Factory, Nanjing 210032, China
  • Received:2008-11-17 Revised:1900-01-01 Online:2008-12-30 Published:2008-12-30

Abstract: Purification of tannin from Chinese gall nut was studied through treatment with granulated Fuller'earth and activated carbon. The results indicated that the sample with purity of tannin ≥98%, color 0.6 (Lovibond total color), content of main metal ions ≤0.5 μg/g was obtained respectively by extracting Chinese gall nut solution by 95% alcohol at 60℃, 30 mL/min flow rate with combined columns of granulated Fuller'earth and activated carbon.

Key words: gall nut tannin, granulated Fuller'earth, active carbon, physical absorption method, food grade tannin

CLC Number: