Hydrotropic effect and thermodynamic analysis on the solubility and mass transfer coefficient enhancement of ethylbenzene

Antony Bertie Morais; Chinnakannu Jayakumar; Nagarajan Nagendra Gandhi

Korean Journal of Chemical Engineering, Vol.30, No.4, 925-930, April, 2013

DOI10.1007/s11814-012-0213-y Export Citation

Hydrotropic effect and thermodynamic analysis on the solubility and mass transfer coefficient enhancement of ethylbenzene

Antony Bertie Morais, Chinnakannu Jayakumar, and Nagarajan Nagendra Gandhi^†

Department of Chemical Engineering, A. C. College of Technology, Anna University, Chennai 600025, India

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Concentrated aqueous solutions of a large number of hydrotropic agents, urea, nicotinamide, and sodium salicylate, have been employed to enhance the aqueous solubilities of poorly water soluble organic compounds. The influence of a wide range of hydrotrope concentrations (0-3.0mol·L^(-1)) and different system temperatures (303-333 K) on the solubility of ethylbenzene has been studied. The solubility of ethylbenzene increases with increase in hydrotrope concentration and also with system temperature. Consequent to the increase in the solubility of ethylbenzene, the mass transfer coefficient was also found to increase with increase in hydrotrope concentration at 303 K. The enhancement factor, which is the ratio of the value in the presence and absence of a hydrotrope, is reported for both solubility and mass transfer coefficient of ethylbenzene. The Setschenow constant, Ks, a measure of the effectiveness of a hydrotrope, was determined for each case. To ascertain the hydrotropic aggregation behavior of ethylbenzene, thermodynamic parameters such as Gibb’s free energy, enthalpy, and entropy of ethylbenzene were determined.

Keywords:Ethylbenzene;Hydrotropy;Solubility;Mass Transfer Coefficient;Sodium Salicylate

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[1] Neuberg C, Biochem. Z., 76, 107 (1916)

[2] Mckee RH, Ind. Eng. Chem. Res., 38, 382 (1946)

[3] Booth HS, Everson HE, Ind. Eng. Chem. Res., 41, 2627 (1949)

[4] Korenman YI, J. Phys. Chem., 48, 377 (1974)

[5] Badwan AA, El-Khordagui LK, Saleh AM, Khalil SA, Int. J. Pharm., 13, 67 (1983)

[6] Janakiraman B, Sharma MM, Chem. Eng. Sci., 40, 2156 (1985)

[7] Gaikar VG, Sharma MM, Solvent Extr. Ion Exch., 4, 839 (1986)

[8] El-Khordagui LK, Int. J. Pharm., 83, 53 (1992)

[9] Su M, Wang JK, Hou Y, J. Chem. Eng. Data, 52(6), 2266 (2007)

[10] Gandhi NN, Kumar MD, Sathyamurthy N, J. Chem. Eng. Data, 43(5), 695 (1998)

[11] Muthukumaran P, Gupta RB, Sung HD, Shim JJ, Bae HK, Korean J. Chem. Eng., 16(1), 111 (1999)

[12] John AD, Lange’s handbook of chemistry, McGraw-Hill, New York (1987)

[13] Kumar MD, Gandhi NN, J. Chem. Eng. Data, 45(3), 419 (2000)

[14] Koparkar YP, Gaikar VG, J. Chem. Eng. Data, 49(4), 800 (2004)

[15] Kadam Y, Yerramilli U, Bahadur A, Colloids Surf. B., 72, 141 (2009)

[16] Setschenow J, Z. Phys. Chem., 4, 117 (1889)

[17] Gaikar VG, Phatak PV, J. Chem. Eng. Data., 38, 217 (1993)

[18] Thenesh Kumar S, Gnana Prakash D, Nagendra Gandhi N, Korean J. Chem. Eng., 26(5), 1328 (2009)