镧化合物加碳氯化的实验研究  

Experimental Study on Carbochlorination of Lanthanum Compounds by Cl_2 Gas

作　　者：姜银举[1] 邓永春[1] 王永强[1] 辛文彬[1] 

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010

出　　处：《稀土》2017年第6期97-102,共6页Chinese Rare Earths

基　　金：国家自然科学基金项目(51364029);内蒙古科技大学材料与冶金学院青年人才孵化器平台项目(2014CY012)

摘　　要：分别研究了铈磷灰石型La_(9.31)(Si_(1.04)O_4)_6O_2和La_2O_3两种化合物氯气加碳的氯化过程。实验得到较佳的氯化条件为:La_2O_3在600℃氯化45 min,氯化率达95%;La_(9.31)(Si_(1.04)O_4)_6O_2在825℃氯化90 min,氯化率达86%。La_(9.31)(Si_(1.04)O_4)_6O_2的化学稳定性高于La_2O_3,致使La_(9.31)(Si_(1.04)O_4)_6O_2的氯化难度加大。此外,X射线衍射分析发现,两种镧化合物均为分步氯化过程,LaOCl是中间产物;但La_2O_3氯化为LaOCl步骤的速度较La_(9.31)(Si_(1.04)O_4)_6O_2快。The carbochlorination process of La2 O3 and La9.31 （Si1.04 O4 ）6 O2 by Cl2 gas was studied in this paper. The opti- mized chlorination conditions corresponding chlorination ratio were obtained. The chlorination ratio of La2O3 reached to 95% at 600℃ for 45 minutes, while La9.31 （Si1.04 O4 ）6 O2 were up to 86% at 825 ℃ for 90 minutes. The chlorination of La9.31 （Si0.04 O4 ）6O2 is more diffcuh than that of La2O3 due to chemical stability higher than La2 O3. Furthermore, X-ray diffraction analysis showed that chlorination process of two lanthanum compounds is step by step and the intermediate product is LaOCl. However, the chloride rate of La2O3 to LaOCl is faster than that of La9.31 （Si1.04 O4 ）602.

关 键 词：LA2O3 La9.31(Si1.04O4)6O2 氯气 加碳氯化 

分 类 号：TF1[冶金工程—冶金物理化学]