氯化钪熔盐制备过程中抑制氯化钪水解试验研究  

Experimental Study on Inhibition of Hydrolysis Scandium Chloride During Preparation of Anhydrous Scandium Chloride Molten Salt

作　　者：张桂芳[1] 张宗华[2] 张军[2] 余艳平[2] 

机构地区：[1]昆明理工大学应用技术学院,云南昆明650093 [2]昆明理工大学国土与资源工程学院,云南昆明650093

出　　处：《稀有金属》2008年第3期315-319,共5页Chinese Journal of Rare Metals

基　　金：云南省学科带头人后备人才基金(2006PY01-05)资助项目

摘　　要：分析了氯化钪易水解生成ScOCl的机制,提出了抑制ScOCl生成的研究方案:在熔盐中加入氯化铵,从而抑制了无水氯化钪熔盐脱水过程中氯化钪的水解,制定了脱除氯化铵和剩余结晶水的新工艺。对无水氯化钪熔盐制备过程中脱氯化铵和剩余结晶水阶段的温度、氯化铵用量、时间、升温速度和惰性气体流量等因素对钪水解率的影响进行了试验研究。得出此阶段的最佳工艺条件为:温度400℃,氧化钪与氯化铵质量比1∶1.5(氧化钪与辅盐质量比1∶5.4),时间120min,升温速度10℃.min-1,惰性气体流量5L.min-1。Based on analysis of mechanism on scandium chloride tended toward becoming ScOCI by hydrolysis, a research scheme of inhibiting forming ScOC1 was proposed. The plan was that ammonium chloride was added into scandium chloride molten salt for inhibiting hydrolysis of scandium chloride. A new process of removing ammonium chloride and dehydration of crystal water was adopted. The influences of temperatures of removal of ammonium chloride and dehydrating residual crystal water, amount of ammoniumchloride, time, rate of temperature rise and inert gas flow on hydrolysis ratio of scandium were studied experimentally during preparation anhydrous scandium chloride molten salt. The optimal conditions in this pe- riod were that temperature was 400 ℃, the ratio of scandium oxide to ammonium chloride in mass was 1： 1.5（the ratio of scandium oxide to additional salt was 1： 5.4）, time was 120 min, temperature rising rate was 10 ℃ ·min^-1, and inert gas/low was 5 L·min^-1

关 键 词：无水氯化钪熔盐 氯化钪水解 脱除氯化铵 

分 类 号：O614.33[理学—无机化学] TF803.11[理学—化学]