Liquid–liquid equilibria of aqueous two phase system containing of PEGDME and (NH4)2 SO4 at different temperatures and its application in partitioning of lactic acid

Journal of Chemical Reactivity and Synthesis

دوره 10، شماره 3، آذر 2020، صفحه 125-132   

نوع مقاله: Research Article

نویسندگان

Mohammed Taghi Zafarani Moattar؛ Hemayat Shekaari؛ Tohid Hashemzadeh^*

Physical Chemistry Department, Faculty of Chemistry, University of Tabriz, Tabriz, 5166616471, Iran

چکیده

In this work, the liquid-liquid equilibria (LLE) of (PEGDME2000 +ammonium sulphate + water) was studied at T= (298.15, 308.15 and 318.15) K. Furthermore for this system the free energies, enthalpies and
entropies of cloud points were calculated at the mentioned temperatures in order to investigate the driving force for the mentioned two-phase system. For representing the experimental binodal data the Merchuk equation in the original form and with the temperature dependency and an empirical equation were used. Othmer-Tobias and Bancraft, a temperature dependent Setschenow and osmotic virial equations were used to fit the tie-line data. Moreover, the effect of temperature on the binodal curves and the tie-lines for the investigated aqueous two-phase system have been studied. In addition the partitioning behaviour of the lactic acid molecule on the investigated aqueous two-phase system was studied.

کلیدواژه‌ها

Liquid–liquid) equilibrium؛ Polyethylene glycol di-methyl ether؛ Ammonium sulphate؛ Setschenow equation؛ Lactic acid