| 张霞,黄雪莉.化学通报,2015,78(4):337-341. |
| 低温下Na //Cl-,SO42-,NO3-,H2O体系相平衡研究 |
| Study on the Phase Equilibria of the Quatemary SystemNa //Cl-, SO42-, NO3--H2O at low temperatures |
| 投稿时间：2014-08-27 修订日期：2014-11-06 |
| DOI： |
| 中文关键词: 硝酸盐 低温 溶解度 相平衡 |
| 英文关键词:salt nitrate low temperatures solubility phase equilibrium |
| 基金项目:国家自然科学基金项目(21166022)和新疆大学创新团队(培养)项目资助 |
|
| 摘要点击次数: 3378 |
| 全文下载次数: 0 |
| 中文摘要: |
| 采用等温溶解平衡法研究了四元体系Na //Cl-, SO42-, NO3--H2O在5、0 、-5与-15℃下的相平衡关系。结果表明：四个温度下体系无复盐形成,平衡相图的构型基本一致；平衡相图均由三个结晶区(Na2SO4.10H2O、NaCl和NaNO3)、三条单变量曲线(NaCl-Na2SO4.10H2O、NaCl-NaNO3、NaNO3-Na2SO4.10H2O)及一个共饱点(NaCl-NaNO3- Na2SO4.10H2O)组成；四个温度下的平衡相图相比,随着温度的下降Na2SO4.10H2O结晶区不断扩大,NaCl和NaNO3结晶区相对缩小；与该体系常温下的平衡相图相比,由于无复盐形成,低温下的相图大为简化。 |
| 英文摘要: |
| The liquid-solid phase equilibria were studied for the quaternary system Na //Cl-, SO42-, NO3--H2O at 5, 0, -5 and -15℃by isothermal dissolution method. The results show: at different temperatures, no complex salt is formed, and the configurations of the phase equilibrium diagrams are consistent; in the phase diagrams, there are three crystalline regions with one salt corresponding to Na2SO4.10H2O, NaCl, NaNO3; three univariate curves with two salts corresponding to NaCl-Na2SO4.10H2O, NaCl-NaNO3, NaNO3-Na2SO4.10H2O; and a invariant point with three salts corresponding to NaCl-NaNO3-Na2SO4.10H2O. In addition, in these phase diagrams, as the temperature drops, Na2SO4.10H2O crystalline region become largger, NaCl and NaNO3 crystaliine regions become narrower relatively. Compared with the phase equilibrium diagrams of this system at normal temperature, ones of this system at 5, 0, -5 and -15℃ are more simple because no complex salts are formed. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|