| 铝酸钠溶液中过饱和氧化硅的稳定性 |
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| 引用本文： | 张亦飞,郑诗礼,张懿. 铝酸钠溶液中过饱和氧化硅的稳定性[J]. 化工学报, 2004, 55(5): 695-698 |
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| 作者姓名： | 张亦飞 郑诗礼 张懿 |
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| 作者单位： | 中国科学院过程工程研究所,北京,100080;中国科学院过程工程研究所,北京,100080;中国科学院过程工程研究所,北京,100080 |
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| 基金项目： | 国家自然科学基金资助项目 (No 5 99740 2 7)~~ |
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| 摘 要： | 研究了铝酸钠溶液分解条件下溶液中SiO2稳定期与温度、氧化铝浓度、碱浓度和SiO2过饱和度的相互关系,并应用结晶成核的动力学理论进一步得出了铝酸钠溶液中超溶解度的计算公式.此式可方便地用于计算铝酸钠溶液不同水解度时所允许的溶液中最大SiO2浓度，用于指导碱法生产氧化铝工艺中的脱硅和铝酸钠溶液水解操作.
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| 关 键 词： | 铝硅酸钠 成核 过饱和 稳定性 |
| 文章编号： | 0438-1157(2004)05-0695-04 |
| 收稿时间： | 2003-01-08 |
| 修稿时间： | 2003-5-12 |
STABILITY OF SUPERSATURATED SILICA IN SODIUM ALUMINATE SOLUTION |
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| ZHANG Yifei,ZHENG Shili,ZHANG Yi. STABILITY OF SUPERSATURATED SILICA IN SODIUM ALUMINATE SOLUTION[J]. Journal of Chemical Industry and Engineering(China), 2004, 55(5): 695-698 |
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| Authors: | ZHANG Yifei ZHENG Shili ZHANG Yi |
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| Abstract: | The relationship of the stability period of supersaturated silica with temperature,alumina concentration,alkali concentration and supersaturation was obtained under the hydrolysis condition. Furthermore,according to the kinetics theory of crystallized nucleation,the equation to calculate the supersolubility of silica in sodium aluminate solution was deduced as well,which correlated the supersolubility of silica with the stability period of supersaturated solute in solution.The mechanism of nucleation was also investigated through classical nucleation theory. Under the hydrolysis condition in alumina production,the nucleation mechanism was mainly heterogeneous. |
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| Keywords: | sodium aluminosilicate nucleation supersaturation stability |
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