草酸反萃取法直接沉淀负载铈有机相的表征分析  

Characterization and Analysis of Direction Extraction and Precipitation of Cerium Loading Organic Phase by Oxalic Acid Solution

作　　者：梅燕[1] 夏川[1] 陈晓丽[1] 孙何[1] 聂祚仁[1] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100124

出　　处：《光谱学与光谱分析》2011年第11期3083-3086,共4页Spectroscopy and Spectral Analysis

基　　金：国家(863计划)项目(2010AA03A407)资助

摘　　要：研究了氢氧化钠介质皂化条件下,用草酸溶液从负载铈的P507有机相中直接反萃取沉淀铈的试验结果。利用红外光谱(IR)、X射线衍射(XRD)、扫描电子显微镜(SEM)及热重-差热分析仪(TG-DSC)等手段,对反萃所得铈沉淀物及最终焙烧产物的物相、形貌和热失重等进行了分析、测试与表征。实验结果表明:沉淀有机相为球形有机铈的配合物,焙烧产物为球形的立方晶系的CeO2晶体,说明前驱物与产物形貌有遗传继承性。IR证实了萃合物的结构与最终CeO2晶体结构完全不同,热重表明吸附水失重为3.5%,所得最终产物的化学组成为CeO2.1/3H2O。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 CeO2·1/3H2O.

关 键 词：反萃取 沉淀有机相 表征 

分 类 号：O643.3[理学—物理化学] O614.3[理学—化学]