摘要
采用等温溶解平衡法测定了三元体系LaCl_3-HCl-H_2O 298.15 K下的溶解度数据,分别采用质量滴定法和重量法对平衡后的液固相组成进行了测定,得出在298.15 K下随着体系中盐酸浓度的增加,LaCl_3浓度在减小,平衡后析出的固相均是LaCl_3·7H_2O_((s)),且用两种方法测定的相平衡数据较一致,说明这两种方法对该体系相图的测定较准确。
Solubility isotherms of the ternary system LaCl3-HCl-H2O were elaborately determined at 298.15 K by an isothermal method,and the compositions of the liquid phase and the wet solid phase were determined by mass titration method and gravimetric method,respectively.It is found that the composition of the lanthanum chloride reduced with the increasing of the hydrochloric acid at 298.15 K,and the equilibrium solid phase was LaCl3·7H2O(s).Besides,the solubility data determined by the two methods were consistent,which implied that the phase diagram was accurate.
作者
李红霞
刘素英
杨坤
LI Hong-xia;LIU Su-ying;YANG Kun(College of Chemistry,Baotou Teachers’College,Inner Mongolia University of Science and Technology,Baotou 014030,China;Baotou Steel Second Experiment Primary School,Baotou 014010,China)
出处
《稀土》
EI
CAS
CSCD
北大核心
2019年第2期81-87,共7页
Chinese Rare Earths
基金
国家自然科学地区基金项目(21868023
51563019)
内蒙古自然科学博士基金项目(2017BS0201)
关键词
氯化镧
盐酸
相平衡
质量滴定法
重量法
lanthanum chloride
hydrochloric acid
phase equilibrium
mass titration method
gravimetric method
