Abstract
Abstract An apparatus for vapour - liquid equilibrium measurement at elevated pressures was built. Construction was based on the Rogalski - Malanowski glass ebulliometer designed for precise measurements up to normal pressure. Experimental procedure was also developed. For the performance test of the proposed apparatus the vapour pressure was measured for four pure substances (benzene, heptane, cyclohexane and water) and the vapour - liquid equilibrium (VLE) was determined for two binary mixtures (benzene + heptane and benzene + cyclohexane). The results obtained were satisfactory.
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