The relative volatilities at infinite dilution in solvents N-methyl pyrroli-done (NMP)

N

N-dimethyl formamide (DMF) and acetonitrile for penten-1-yne-4 and isoprene were determined by gas chromatography. Results showed NMP and DMF to be better than acetonitrile for separating penten-l-yne-4 from isoprene. Vapor liquid equilibria for the following systems were determined at 0

15

30℃ by the use of a modified Junghans still and the Wilson parameters Δ for binay systems were evaluated by regression method. ( 1 ) 2-methyl-butene-2-penten-1-yne-4

(2) n-pentane-penten-1-yne-4

(3) isoprene-penten-1-yne-4

( 4 ) penten-1-yne-4-acetonitrile

( 5 ) isoprene-penten-1-yne-4-acetonitrile

( 6 ) isopene-penten-1-yne-4-DMF

(7 ) isoprene-penten-1-yne-4-NMP

The vapro-liquid equilibrium for the ternary system ( 5 ) was predicted by the use of Δ for binary systems. The mean deviation of vapor compositions was 0.0114 mole fraction as compared with experimental results.