Effects of alcohols on the aqueous solubility of disperse dyes |
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| Authors: | T Takagishi A Katayama M Matsuoha K Konishi N Kuroki |
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| Institution: | (1) Present address: Department of Applied Chemistry, College of Engineering, University of Osaka Prefecture, Sakai, Osaka, Japan |
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| Abstract: | Summary The solubility of azobenzene in water and aqueous alcohol solutions was determined at 5 °C intervals from 0° to 40 °C. Prom the results the thermodynamic parameters for the transfer of one mole of azobenzene from water to aqueous alcohol solution were calculated. It was found that the process was endothermic: furthermore, it was invariably accompanied by a positive unitary entropy change. The solubilizing mechanism of alcohols was explained in terms of an adduct-formation with the compound to be dissolved by means of hydrophobic interaction. |
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