Liquid-liquid phase equilibrium for a new extraction system based on polyvinylpyrrolidone-3500 and sodium nitrate at 298.15, 313.15, and 333.15 K has been studied. Binodal data and phase diagrams with liquid-liquid tie lines have been presented. Mathematical modeling of phase equilibrium in the given system has been performed. New parameters for the UNIQUAC equation have been selected. The UNIQUAC model can be successfully used to describe phase equilibrium in the system. The results of this study can be used in the development of new extraction processes for the recovery of organic compounds.
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Univ Aveiro, CICECO, Dept Chem, P-3810193 Aveiro, Portugal
Univ Minho, Ctr Biol Engn, IBB, P-4710057 Braga, PortugalUniv Sao Paulo, Dept Biochem & Pharmaceut Technol, BR-05508900 Sao Paulo, Brazil
Pereira, Jorge F. B.
Santos, Valeria C.
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Univ Sao Paulo, Dept Biochem & Pharmaceut Technol, BR-05508900 Sao Paulo, BrazilUniv Sao Paulo, Dept Biochem & Pharmaceut Technol, BR-05508900 Sao Paulo, Brazil
Santos, Valeria C.
Johansson, Hans-Olof
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Lund Univ, Dept Pure & Appl Biochem, SE-22100 Lund, SwedenUniv Sao Paulo, Dept Biochem & Pharmaceut Technol, BR-05508900 Sao Paulo, Brazil
Johansson, Hans-Olof
Teixeira, Jose A. C.
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Univ Minho, Ctr Biol Engn, IBB, P-4710057 Braga, PortugalUniv Sao Paulo, Dept Biochem & Pharmaceut Technol, BR-05508900 Sao Paulo, Brazil
Teixeira, Jose A. C.
Pessoa, Adalberto, Jr.
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Univ Sao Paulo, Dept Biochem & Pharmaceut Technol, BR-05508900 Sao Paulo, BrazilUniv Sao Paulo, Dept Biochem & Pharmaceut Technol, BR-05508900 Sao Paulo, Brazil