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Liquid-liquid phase equilibria of ethanol - water - gasoline ('iso-octane', 'octane' 'petrol', 'kerosene' and 'diesel') were experimentally determined and the ternary phase diagrams of the systems were studied with an end in view to develop methods of producing 'gasohol' by a once through operation. Binodal curves of the different systems were, therefore, obtained to give quantitative ideas about the extent of extrac- tion of alcohol from aqueous solution using gasoline. Phase equilibrium data, distri- bution coefficient and separation factor were obtained experimentally for ethanol- water-gasoline systems. The order of the heterogeneous region of the solvents is iso- octane .'octane'.'petrol' < 'kerosene' < 'diesel'. The equilibriation and settling time for ethanol - water - solvent systems are about 10 and 20 min, respectively. The sol- ubility of ethanol in the solvents is in the order of iso-octane . 'octane'.'petrol' > 'kerosene' > 'diesel'. The distribution coefficient increases with increasing ethanol concentration in the feed; however, to the contrary the separation factor decreases. The distribution co-efficients are lower than 1 and the separation factors are greater than 10 for all of the solvents.

Extraction of Gasohol Grade Ethanol from Aqueous Solution using Gasoline as Solvent