Phase diagrams of binary systems containing n-alkanes, or cyclohexane, or 1-alkanols and 2,3-pentanedione at atmospheric and high pressure

摘要: Abstract Phase equilibria, for the binary systems {n-alkanes (tridecane, octadecane, or eicosane), cyclohexane, 1-alkanol (1-hexadecanol, 1-octadecanol, 1-eicosanol) + 2,3-pentanedione} have been determined using a cryometric dynamic method at atmospheric pressure. The influence of pressure on liquidus curve up to 800 MPa was cyclohexane + 2,3-pentanedione) systems. A thermostated apparatus measurements transition pressures from liquid solid state in two component isothermal solutions (pressometry) used. freezing and melting temperatures constant composition increase monotonously with high-pressure experimental results obtained conditions (p–x) were interpolated well known T–x diagrams. Immiscibility phase observed only n-alkanes mixtures. solubility decreases an number carbon atoms n-alkane, chain. higher intermolecular solute–solvent interaction 1-alkanols. Experimental are compared values calculated by means NRTL equation (n-alkanes) UNIQUAC ASM equations utilizing parameters derived SLE LLE results. existence solid–solid first-order tridecane, eicosane 1-alkanols has taken into consideration calculations. correlation data average root-mean-square deviation temperature σ