Kinetic study of ytterbium(iii) extraction sulfate medium with cyanex 923
文献类型：期刊论文
| 作者 | Wang, Weiwei; Liu, Jianjun; He, Wenwei; Lil, Deqian |
| 刊名 | Journal of chemical technology and biotechnology
 |
| 出版日期 | 2007-08-01 |
| 卷号 | 82期号:8页码:705-710 |
| 关键词 | Extraction Kinetics Constant interfacial cell Diffusion Ytterbium Cyanex 923 |
| ISSN号 | 0268-2575 |
| DOI | 10.1002/jctb.1712 |
| 通讯作者 | Lil, deqian(ldq@ciac.jl.cn) |
| 英文摘要 | The kinetics of ytterbium(iii) extraction from sulfate medium with cyanex 923 in heptane has been investigated with a constant interfacial cell with laminar flow, which aimed to identify the extraction regime, reaction zone and rate equations. it was found that the extraction rate of ytterbium(iii) increased linearly with stirring speed and specific interfacial area. the activation energy ea (9.56 kj mol(-1)), activation enthalpy delta h-+/- (7.05 kj mol(-1)), activation entropy delta s-+/- (298) (-0.31 kj mol(-1)) and gibbs free energy of activation delta g(298)(+/-) (98.3 kj mol(-1)) were calculated from the dependence of extraction rate on temperature. the experiential rate equations were obtained by investigating the influence of the concentration of various species on the extraction rate. a diffusion regime has been deduced from evidence of the linear dependence of extraction rate on stirring speed and the low value of the activation energy. the liquid-liquid interface is most probably the reaction zone in view of the linear dependence of extraction rate on specific interfacial area, the high interfacial activity and low water-solubility of extractant. thus the mass transfer rate is controlled by interfacial film diffusion of species. (c) 2007 society of chemical industry. |
| WOS关键词 | SOLVENT-EXTRACTION ; MASS-TRANSFER ; MECHANISM ; DODECANE ; SYSTEM ; FLOW |
| WOS研究方向 | Biotechnology & Applied Microbiology ; Chemistry ; Engineering |
| WOS类目 | Biotechnology & Applied Microbiology ; Chemistry, Multidisciplinary ; Engineering, Chemical |
| 语种 | 英语 |
| WOS记录号 | WOS:000248792000003 |
| 出版者 | JOHN WILEY & SONS LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2382290 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Lil, Deqian |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, Key Lab Rare Earth Chem & Phys, Changchun 130022, Peoples R China 2.Grad Univ Chinese Acad Sci, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Weiwei,Liu, Jianjun,He, Wenwei,et al. Kinetic study of ytterbium(iii) extraction sulfate medium with cyanex 923[J]. Journal of chemical technology and biotechnology,2007,82(8):705-710. |
| APA | Wang, Weiwei,Liu, Jianjun,He, Wenwei,&Lil, Deqian.(2007).Kinetic study of ytterbium(iii) extraction sulfate medium with cyanex 923.Journal of chemical technology and biotechnology,82(8),705-710. |
| MLA | Wang, Weiwei,et al."Kinetic study of ytterbium(iii) extraction sulfate medium with cyanex 923".Journal of chemical technology and biotechnology 82.8(2007):705-710. |
入库方式： iSwitch采集
来源：中国科学院大学
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。