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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2009, Vol. 10 Issue (5): 739-745    DOI: 10.1631/jzus.A0820516
Energy and Chemical Engineering     
Enhancement of solubility and mass transfer coefficient of salicylic acid through hydrotropy
S. THENESHKUMAR, D. GNANAPRAKASH, N. NAGENDRA GANDHI
Department of Chemical Engineering, St. Peter’s Engineering College, Chennai 600054, India; Department of Chemical Engineering, Alagappa College of Technology, Anna University, Chennai 600025, India
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Abstract  This study deals with the effect of hydrotropes on the solubility and mass transfer coefficient of salicylic acid. The solubility and mass transfer studies were performed using the hydrotropes, i.e., sodium acetate, sodium salicylate, citric acid, and urea at concentrations of 0~3.0 mol/L and system temperatures of 303~333 K. It was found that the solubility and mass transfer coefficient of salicylic acid increases with increase in hydrotrope concentration and also with system temperature. All hydrotropes used in this work showed an enhancement in solubility and mass transfer coefficient to different degrees. The maximum enhancement factor values were determined for all hydrotropes used in this study. The highest value was 28.08 for solubility studies and 10.42 for mass transfer studies. The performance of hydrotropes was measured in terms of the Setschenow constant (Ks). The highest value observed was 0.696.

Key words： Hydrotropy      Hydrotropes      Solubilization      Mass transfer coefficient      Separation     
Received: 06 July 2008     
CLC:  TQ4  
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S. THENESHKUMAR
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S. THENESHKUMAR, D. GNANAPRAKASH, N. NAGENDRA GANDHI. Enhancement of solubility and mass transfer coefficient of salicylic acid through hydrotropy. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2009, 10(5): 739-745.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A0820516     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2009/V10/I5/739

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