شماره ركورد كنفرانس :
4719
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 Engineer_tohid@yahoo.com Physical Chemistry Department, Faculty of Chemistry, University of Tabriz, Tabriz; Fax:04133340191; Tel:04133340081-89; E-mail: , Zafarani–Moattar Mohammed Taghi Physical Chemistry Department, Faculty of Chemistry, University of Tabriz, Tabriz , Shekaari Hemayat Physical Chemistry Department, Faculty of Chemistry, University of Tabriz, Tabriz
كليدواژه :
(Liquid–liquid) Equilibrium , Polyethylene Glycol Di , Methyl Ether , Ammonium Sulphate , Setschenow Equation , Lactic Acid
عنوان كنفرانس :
بيست و يكمين كنفرانس ملي شيمي فيزيك انجمن شيمي ايران
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 mentioned two-phase system. For representing the experimental binodal data the Merchuk equation [1] in the original form and with the temperature dependency and an empirical equation were used. Othmer-Tobias [2] and Bancraft, a temperature dependent Setschenow [3] and osmotic virial model [4] 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 [5] molecule on the investigated aqueous two-phase system was studied.
