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Dissolution of condensed tannin with phenol: Optimum reaction parameters and some flow properties

Authors

  • A. Samil,

    1. Department of Chemistry, Faculty of Science and Arts, Kahramanmaras Sutcu Imam University, Kahramanmaras 46100, Turkey
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  • M. H. Alma,

    Corresponding author
    1. Department of Industrial Engineering of Forestry, Faculty of Forestry, Kahramanmaras Sutcu Imam University, Kahramanmaras 46060, Turkey
    • Department of Industrial Engineering of Forestry, Faculty of Forestry, Kahramanmaras Sutcu Imam University, Kahramanmaras 46060, Turkey
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  • B. Acemioğlu

    1. Department of Chemistry, Faculty of Science and Arts, Kahramanmaras Sutcu Imam University, Kahramanmaras 46100, Turkey
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Abstract

Condensed tannins from the bark of black wattle (Acacia mearnsii L.) were solubilized with phenol using HCl as a catalyst. The optimum reaction parameters (temperature, time, and acid concentration) of the dissolution were determined. The results showed a clear effect on the percentage of reacted phenol and residue tannin by temperature, time and, particularly, acid concentration. It was found that almost 77% of the phenol used could be reacted with the tannin, and about 90% of the tannin could be solubilized into phenol in the presence of HCl (as a catalyst) having a concentration of 5%. The optimum temperature, time, and acid concentration were 160°C, 90 min, and 4%–5%, respectively. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 2450–2453, 2005

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