Study of liquid-liquid equilibria of aqueous two-phase systems containing polyvinylpyrrolidone and salt

• Main Authors: Te-Yao Chung, 鍾德耀
• Other Authors: Chyau-Song Wu
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/08441354245009288031

碩士 === 明志科技大學 === 化工與材料工程研究所 === 95 === Abstract Liquid-liquid equilibrium(LLE) data for the polyvinylpyrrolidone (PVP)-Salt aqueous two-phase systems have been obtained experimentally at T=(278.15, 298.15, 308.15)K. Polyvinylpyrrolidone was used with average molecular weight of 10000, 8000,and 3500.The effect of cations and anions on phase diagram of aqueous two-phase system is studied. The cations used are magnesium Sulfate anhydrous(MgSO4) and sodium sulfate anhydrous(Na2SO4). The anions used are potassium phosphate tribasic(K3PO4) and di-potassium hydrogénophosphate(K2HPO4). The phase diagram of aqueous two-phase with respected to the anion PO43->HPO42-. The phase diagram of aqueous two-phase with respected to the cation Na+>Mg2+. The two-phase area was expanded with increasing of temperature. The result show that the effect of two-phase region are temperature、molecular masses and kinds of salt.