| 碳酸氢钠沉淀镧及碳酸镧的结晶过程研究 |
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| 引用本文： | 焦小燕,罗贤满,杨宇俊,辜子英,李永绣. 碳酸氢钠沉淀镧及碳酸镧的结晶过程研究[J]. 稀有金属与硬质合金, 2001, 0(2): 4-8 |
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| 作者姓名： | 焦小燕 罗贤满 杨宇俊 辜子英 李永绣 |
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| 作者单位： | 南昌大学稀土工程研究中心, |
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| 基金项目： | 国家自然科学基金资助项目(59764001)；江西省自然科学基金资助项目(972007) |
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| 摘 要： | 以pH值原位测定法为基础，结合沉淀体积变化、沉淀粒度及外观形貌分析结果，对NaHCO3上学同淀镧的性能及碳酸镧的结晶过程进行了研究。结果表明：碳酸镧结晶活性区域位于低配比区0．541－2．828之间，而在高配比区其结晶是惰性的。同时还考察了搅拌对结晶过程的影响，讨论了NaHCO3沉淀镧时的沉淀反应和结晶化机理。并给出了相关的化学反应方程式。
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| 关 键 词： | pH值原位测定法 结晶 碳酸镧 碳酸氢钠 沉淀剂 镧 |
| 文章编号： | 1004-0536(2001)02-0004-05 |
| 修稿时间： | 2000-10-25 |
Study of Crystallization Process during La and La2(CO3)3 Precipitation with Sodium Bicarbonate |
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| JIAO Xiao-yan,LUO Xian-man,YANG Yu-jun,GU Zi-ying,LI Yong-xiu. Study of Crystallization Process during La and La2(CO3)3 Precipitation with Sodium Bicarbonate[J]. Rare Metals and Cemented Carbides, 2001, 0(2): 4-8 |
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| Authors: | JIAO Xiao-yan LUO Xian-man YANG Yu-jun GU Zi-ying LI Yong-xiu |
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| Abstract: | Based on pH situ-determination data,together with the results of variation in precipitation volume and precipitation partical size,the properties of lanthanum carbonate precipitated with sodium bicarbonate were investigated.The results show that crystalliazation active zone of lanthanum carbonate is in low molar ratio zone,where the moalr ratio is between 0.541～2.828.However,the crystallization of lanthanum carbonate in high molar ratio zone is inactive.At the same tine,the influence of stirring on the crystallization of lanthanum carbonate was examined ,the crystallization mechanism was discussed and the corresponding reaction equations were proposed. |
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| Keywords: | sodium bicarbonate pH situ-determination crystallization process lanthanum carbonate |
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