Phase equilibrium in systems poly-N-vinylpyrrolidone – inorganic salts – water

doi:10.26565/2220-637X-2014-23-10

Galyna D. Yukhno V.N. Karazin Kharkiv National University
Alla P. Krasnopyorova V.N. Karazin Kharkiv National University
V. D. Trifonov V.N. Karazin Kharkiv National University

DOI: https://doi.org/10.26565/2220-637X-2014-23-10

Keywords: extraction, heterogeneous system, athermal effect binodal, polyvinylpyrrolidone, structure factor, phase diagram

Abstract

The phase equilibria in aqueous two-phase systems based on poly-N-vinylpyrrolidone and some inorganic salts (sodium, magnesium and ammonium sulphate) has been examined in order to select the optimal conditions for obtaining heterogeneous systems for efficient extraction systems for the isolation and separation of metals. Using data on the density of the phases and binodals compositions of coexisting phases in the polyvinylpyrrolidone – salt – water has been calculated.

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