Mei Yan, Xia Chuan, Chen Xiao-Li, Sun He, Nie Zuo-Ren
College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2011 Nov;31(11):3083-6.
In the condition of sodium hydroxide saponification, the test results using direction extraction and precipitation of cerium from P507 loading organic phase by oxalic acid solution were studied. Infared (IR) spectrum, X-ray diffraction (XRD), transmission electron microscope (TEM) and thermogravimetry (TG-DSC) were used to study and characterize organic cerium precipitates and the final calcined products. The results showed that organic cerium precipitates and final calcined products were spheric organic cerium coordination and spheric cube CeO2 crystal, respectively, showing their morphologies were successive. IR made out that the structures of organic cerium precipitates and final calcined products were different. TG-DSC indicated that the final calcined products weightlessness was 3.5% and chemical composing was CeO2 x 1/3H2O.
在氢氧化钠皂化条件下，研究了用草酸溶液从P507负载有机相中定向萃取和沉淀铈的试验结果。采用红外光谱（IR）、X射线衍射（XRD）、透射电子显微镜（TEM）和热重分析（TG-DSC）对有机铈沉淀物和最终煅烧产物进行了研究和表征。结果表明，有机铈沉淀物和最终煅烧产物分别为球形有机铈配合物和球形立方CeO₂晶体，显示出它们的形态具有连续性。红外光谱表明有机铈沉淀物和最终煅烧产物的结构不同。热重分析-差示扫描量热法表明最终煅烧产物失重3.5%，化学组成为CeO₂·1/3H₂O。
