Abstract
Vapor-liquid equilibrium (VLE) data for a mixture at extreme dilution in the range 10-2 to 10-5 mole fraction are necessary in a high-grade purification by distillation. However, it is difficult to measure the VLE data in such a dilute concentration range by the conventional methods. This paper presents a method for measuring the VLE data at extreme dilution using the ebulliometer, by which bubble temperatures of the mixture of charged composition can be accurately measured by taking account of the vapor-phase holdup. This method has been applied to measurement of VLE data for four binary systems of water with alcohols as dilute solutes at 101.325 kPa.
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