Effect of Vinyl Alcohol+Sodium Acrylate Copolymer Gel on the Vapor-Liquid Equilibrium Compositions of Ethanol+Water and 2-Propanol+Water Systems

摘要

The vapor-liquid equilibrium(VLE)compositions of ethanol+water and 2-propanol+water systems containing polymeric gel(vinyl alcohol+sodium acrylate copolymer)were measured at 298.15 K by using flow-type equipment that can detect the concentrations of solvents in the vapor phase and the partial pressures of each solvent.Helium gas was used as the carrier gas.The mole fraction of the vapor phase was determined by gas chromatography with a concentration accuracy of(+-)0.4%,and the mole fraction of the liquid phase was obtained from feed compositions.It was found that the mole fraction of alcohol in the vapor phase increases with an increase in the concentration of polymeric gel in the liquid phase.