Kinetics of boehmite precipitation from supersaturated sodium aluminate solutions with ethanol-water solvent
文献类型：会议论文
| 作者 | Wang, Zhi1; Xu, Rongguang1,2; Yang, Liu1,2; Guo, Zhancheng1 |
| 出版日期 | 1905-07-04 |
| 会议日期 | March 11, 2012 - March 15, 2012 |
| 会议地点 | Orlando, FL, United states |
| 关键词 | Organic solvents - Aluminum oxide - Corundum - Activation energy - Sodium Aluminate |
| 页码 | 119-124 |
| 英文摘要 | Boehmite was prepared from supersaturated sodium aluminates solutions with ethanol-water solvent. The results of thermogravimetric analyzer and XRD showed that the product was mixture of boehmite and gibbsite, and the mass ratio of gibbiste and boehmite varied greatly with different process conditions. This work presents the effects of mass ratio of ethanol and temperature on the precipitation rate and phase compositions of alumina hydrate. The ratio of AlOOH in the product increased significantly with the increase of mass ratio of ethanol because the precipitation of gibbsite was restrained. When the solvent was pure ethanol, the ratio of AlOOH in the product reaches the peak of 90%. Ethanol reduces the free caustic concentration and increases initial supersaturation coefficient significantly. The boehmite activation energy of precipitation in ethanol solvent was 13.7 kJ/mol, indicated that ethanol reduces effectively energy barrier of boehmite from sodium aluminate solutions and it was controlled by diffusion process. |
| 资助机构 | Minerals, Metals and Materials Society, 184 Thorn Hill Road, Warrendale, PA 15086, United States |
| 会议录 | Light Metals 2012 - TMS 2012 Annual Meeting and Exhibition
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| 学科主题 | Ethanol |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/59442]  |
| 作者单位 | 1.National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 2.Graduate University of the Chinese Academy of Sciences, Beijing, 100049, China |
| 推荐引用方式 GB/T 7714 | Wang, Zhi,Xu, Rongguang,Yang, Liu,et al. Kinetics of boehmite precipitation from supersaturated sodium aluminate solutions with ethanol-water solvent[C]. 见:. Orlando, FL, United states. March 11, 2012 - March 15, 2012. |
入库方式： OAI收割
来源：过程工程研究所
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