Effect of hydrotropes on solubility and mass transfer coefficient of organic solutes

Abstract

In the present work a comprehensive study on the effect of hydrotropes such as citric acid pyrogallol resorcinol sodium benzoate sodium salicylate nicotinamide and urea on the solubility and mass transfer coefficient for a series of organic solutes such as amyl nitrite cyclohexene ethylbenzene n butyl chloride and L aspartic acid has been carried out The influence of a wide range of hydrotrope concentrations 0 3 0 mol L 1 and different system temperatures 303 333 K on the solubility of organic solutes has been studied The influence of different hydrotrope concentrations on the mass transfer coefficient of organic solutes has been ascertained To propose a possible mechanism of hydrotropic phenomenon a study on solution properties of hydrotropes such as viscosity specific gravity surface tension specific conductance and refractive index have been determined for a range of hydrotrope concentrations Scanning Electron Microscope images of pure Laspartic acid i e the only solute in solid phase and solubilized L aspartic acid in the presence of corresponding best hydrotrope have been presented and discussed in detail