Liquid–liquid equilibria of aqueous two phase system containing of PEGDME 2000 and (NH4)2 SO4 at different temperatures and its application in partitioning of lactic acid

سال انتشار: 1396
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 257

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شناسه ملی سند علمی:

ISPTC20_200

تاریخ نمایه سازی: 2 تیر 1397

چکیده مقاله:

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

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نویسندگان

Mohammed Taghi Zafarani-Moattar

Physical Chemistry Department, Faculty of Chemistry, University of Tabriz, Tabriz, ۵۱۶۶۶۱۶۴۷۱, Iran

Hemayat Shekaari

Physical Chemistry Department, Faculty of Chemistry, University of Tabriz, Tabriz, ۵۱۶۶۶۱۶۴۷۱, Iran

Tohid Hashemzadeh

Physical Chemistry Department, Faculty of Chemistry, University of Tabriz, Tabriz, ۵۱۶۶۶۱۶۴۷۱, Iran