Liquid–liquid equilibrium of the Ucon 50-HB5100/sodium

G. TUBIO; B. NERLI; A. VENANCIO; J. TEIXEIRA; G. PICO

Separation and Purification Technology

Elsevier

Lugar: Amsterdand; Año: 2009 vol. 65 p. 3 - 8

The phase diagrams of Ucon 50-HB5100/sodium citrate aqueous two-phase systems were determined at 5, 20 and 40 ◦C. Two medium pHs .5.20 and 8.20 were assayed. The binodal curves were satisfactorily described using a four-parameter sigmoidal equation. The two-phase area wa expanded by increasing both pH and temperature. The reliability of the measured tie line compositions was ascertained by correlation equations given by Othmer–Tobias and Bancroft.◦C. Two medium pHs .5.20 and 8.20 were assayed. The binodal curves were satisfactorily described using a four-parameter sigmoidal equation. The two-phase area wa expanded by increasing both pH and temperature. The reliability of the measured tie line compositions was ascertained by correlation equations given by Othmer–Tobias and Bancroft.