ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Determination of the vapor-liquid equilibrium in the water-trioxane system

Š. Ďuraš

Chemko, n. p., Strážske

Abstract: The vapor-liquid equil. was studied in the H₂O-trioxane system. The activity coeffs. were calcd. from the b.p. of the azeotrope and the b.ps. of the H₂O-trioxane mixt. The b.p. of the azeotrope is 91.5° at the compn. x1 = y1 = 0.682, where x1 is the mole fraction of H₂O in the liquid and y1 the mole fraction of H₂O in the vapor. From the known dependence of the b.p. on the compn. of the mixt. under const. pressure, the apparent activity coeffs. were detd. by the method of Carlson (C. and Colburn, CA 36: 34109), which by graphical extrapolation were calcd. to be: A' = 0.632 and B' = 1.130. The activity coeffs. v1 and v2 can be expressed by the following equations: log v1 = 0.632/(1 + (x1/x2) 0.559)2, log v2 = 1.130/(1 + (x2/x1) 1.788)2. An equil. curve y - x was devised from the activity coeffs., which was applied as a base for the calcn. of the continuous rectification. Activity coeffs. and rectification results are given.

Full paper in Portable Document Format: 213a177.pdf (in Slovak)

Chemical Papers 21 (3) 177–181 (1967)