采用自制的相平衡研究装置, 测定了PEG 4000-Cs2SO4-H2O三元体系在25, 35和45 ℃时的等温平衡溶解度, 同时给出了该体系的完整相图, 在相图中观察到6个相区.结果表明, 该体系双液相区随着温度的升高略有增加, 结线的斜率也随温度的升高而增大.用四参数方程y=a+bx0.5+cx+dx2对该体系的双液线进行了拟合, 拟合结果较好.用Othmer-Tobias方程和Bancroft方程对该体系结线的实验数据进行了关联, 所有线性相关系数均大于0.98.热重分析确定平衡固相组成为无水硫酸铯.
参考文献
| [1] | Diego Barba;Vincenzo Brandani .The preparation of carrier free radio bromine:the separation of potassium bromine and potassium bromide using an organic solvent[J].La Chimica E L'Industria,1984,66(05):319. |
| [2] | M.Aznar;R.N.Araujo;J.F.Romanato;G.R.Santos;S.G.d'Avila .Salt Effects on Liquid-Liquid Equilibrium in Water + Ethanol + Alcohol + Salt Systems[J].Journal of Chemical and Engineering Data: the ACS Journal for Data,2000(6):1055-1059. |
| [3] | Hull D R;Owens C W .Radiochem[J].Radioanal Lett,1975,21:39. |
| [4] | Greve Arend;Kula Maria Regina .Phase diagrams of new aqueous phase systems composed of aliphatic alcohol salts and water[J].Fluid Phase Equilibria,1991,62(1-2):55. |
| [5] | Taboada M E;Graber T A;Andrews B A et al.Drowning-out crystallization of sodium sulphate using aqueous two-phase systems[J].Journal of Chromatography B,2000,743:101. |
| [6] | John wiley;Sons.Encyclopedia of Chemical Technology, Forth Edition[M].New York: Swiley Intersecience Publication,1997:591. |
| [7] | 李明谦.国外锂铷铯工业[M].北京:中国工业出版社,1965:142. |
| [8] | 胡满成,孟梅,高世扬,刘志宏,夏树屏.CsCl-C2H5OH-H2O三元体系多温下平衡溶解度的研究[J].高等学校化学学报,2002(07):1219-1222. |
| [9] | 胡满成,刘志宏,高世扬,夏树屏,郝丽霞,岳先丽.30℃时碳酸铯-乙醇-水三元体系的平衡溶解度[J].高等学校化学学报,2000(11):1717-1718. |
| [10] | 胡满成,翟全国,高世扬,刘志宏,褚建利.Cs2SO4-C2H5OH-H2O三元体系30℃和50℃的平衡溶解度研究[J].无机化学学报,2002(07):701-704. |
| [11] | 李明华,高世扬,夏树屏,岳涛.Rb2SO4-C2H5OH-H2O三元体系的溶解度研究[J].稀有金属,2003(02):238-241. |
| [12] | Gon zález-Tello P G;Camacho F;Blazquez G et al.Liquid-liquid equilibrium in the system poly(ethylene glycol)+MgSO4+H2O at 298 K[J].Journal of Chemical and Engineering Data,1996,41:1333. |
| [13] | Ho-Gutiérrez I;Cheluget E;Vera J H et al.Liquid-liquid equilibrium of aqueous mixtures of poly(ethylene glycol) with Na2SO4 or NaCl[J].Journal of Chemical and Engineering Data,1994,39:245. |
| [14] | Voros N;Proust P;Fredenslund A .Liquid-liquid-phase equilibria of aqueous two-phase systems containing salts and polyethylene glycol[J].Fluid Phase Equilibria,1993,90:333. |
| [15] | Mishima K.;Nomiyama T.;Matsuyama K.;Nagatani M.;Nishikawa H.;Nakatani K. .LIQUID-LIQUID EQUILIBRIA OF AQUEOUS TWO-PHASE SYSTEMS CONTAINING POLYETHYLENE GLYCOL AND DIPOTASSIUM HYDROGENPHOSPHATE[J].Fluid Phase Equilibria,1995(2):269-276. |
| [16] | Othmer D F;Tobias P E .Ind[J].Eng Chem,1942,34:693. |
| [17] | Voros N;Proust P;Fredenslund A .Liquid-liquid-phase equilibria of aqueous two-phase systems containing salts and polyethylene glycol[J].Fluid Phase Equilibria,1993,90:333. |
| [18] | Maria Elisa Taboada;Orlando A.Rocha;Teofilo A.Graber;Barbara A.Andrews .Liquid-liquid and Solid-Liquid Equilibria of the Poly(ethylene glycol)+Sodium Sulfate+Water System at 298.15 K[J].Journal of Chemical and Engineering Data: the ACS Journal for Data,2001(2):308-311. |
| [19] | Zaslavsky B Y.Aqueous Two Phase Partitioning, Physical Chemistry and Bioanalytical Applications[M].New York:Marcel Dekker,1995 |
| [20] | Synder S M;Cole K D;Szlag D .Phase compositions, viscosities and densities for aqueous two-phase systems composed of polyethylene gloycol and various salts at 25 ℃[J].Journal of Chemical and Engineering Data,1992,37:286. |
| [21] | Hamer S;Pfennig A;Stumpf J .Liquid-liquid and vapor-liquid equilibria in water+poly(ethylene glycol)+sodium sulfate[J].Chemical Engineering Data,1994,39:3. |
| [22] | Graber TA.;Carton A.;Bolado S.;Taboada ME. .Liquid-liquid equilibrium of the poly(ethylene glycol) plus sodium nitrate plus water system at 298.15 K[J].Journal of Chemical and Engineering Data: the ACS Journal for Data,2000(2):182-184. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%