Browsing by Author "Almeida, Eduardo Tonon de"

Now showing 1 - 1 of 1
  • No Thumbnail Available
    Item
    Liquid–liquid phase equilibrium and Ion‐exchange exploration for aqueous two‐phase systems of ([C4mim] Cl+ K2CO3 or K3C6H5O7+water) at diferent temperatures.
    (2022) Machado, Poliana Aparecida Lopes; Cavalcanti, Marcello Henrique da Silva; Silva, Fábio Antônio Belinelli; Almeida, Eduardo Tonon de; Cardoso, Marcus Vinícius Cangussu; Mesquita, Anderson Fuzer; Lemes, Nelson Henrique Teixeira; Virtuoso, Luciano Sindra
    exchange were evaluated in the formation of these ATPSs. It was observed that decreasing the temperature promoted the phase separation in both ATPSs indicating the exothermic character of the process. The ability of diferent ani- ons to induce phase separation was compared and the order for the strength of the salting out efect observed was PO3− 4 > HPO2− 4 > CO2− 3 > C6H5O3− 7 ≫ HO−. The extent of ion exchange between the equilibrium phases in the two diferent ATPSs was experimentally evaluated and found to be negligible. The binodal curves were ftted to an empirical non- linear expression and the salting out efect was explored using the type-Setschenow equa- tion and the consistence of equilibrium data was evaluated theoretically using the Othmer– Tobias, Hand and Bancroft equations. Finally, the liquid–liquid equilibrium in the ATPSs evaluated in the present work were modelled by NRTL model.