شماره ركورد كنفرانس :
4113
عنوان مقاله :
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
پديدآورندگان :
hashemzadeh tohid Physical Chemistry Department, Faculty of Chemistry, University of Tabriz, Tabriz, Iran , zafarani moattar mohammed taghi Physical Chemistry Department, Faculty of Chemistry, University of Tabriz, Tabriz, Iran , shekari hemayat Physical Chemistry Department, Faculty of Chemistry, University of Tabriz, Tabriz, Iran
كليدواژه :
(Liquid–liquid) equilibrium , The partition coefficient , Setschenow equation , Polyethylene glycol dimethyl ether , Lactic acid.
عنوان كنفرانس :
چهارمين كنفرانس ملي پژوهش هاي نوين در شيمي و مهندسي شيمي
چكيده فارسي :
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.
