Separating Some Crude Oil Products (azeotropic mixture) by Gas Extraction with Carbon Dioxide at Elevated Pressure

Abstract

The ethanol/octane system has an azeotrope at normal pressure. This renders separation by simple distillation impossible. The system was studied at elevated pressure to see whether it was possible to separate the azeotropic mixture by gas extraction with carbon dioxide. It was found that the ternary had isologous phases with a ratio not very different from that in the azeotrope.