Preparation of La2O3 by ion-exchange membrane electrolysis of LaCl3 aqueous solution

作     者：Deliang Meng Qiuyue Zhao Xijuan Pan Ting’an Zhang 

作者机构：Key Laboratory of Ecological Metallurgy of Multi-Metal Intergrown Ores of Ministry of EducationSchool of MetallurgyNortheastern University 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2019年第37卷第9期

页      面：1009-1014,I0005页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 

基　　金：Project supposed by National Key R&D Program of China(2017YFC0210403-04 2017YFC0210404) Liaoning Excellent Talent Cultivation Project(2015020591) the Young Creative Talents Project of Ordinary University in Guangdong Province(2015KQNCX157) Hi-Tech Research and Development Program(863)of China(2010AA03A405) 

主　　题：Lanthanum chloride Membrane electrolysis Lanthanum hydroxide Lanthanum oxide Current efficiency Rare earths 

摘      要：The ion-exchange membrane electrolysis technology was applied inventively in the preparation of lanthanum hydroxide,after calcination,lanthanum oxide was obtained *** effect of the concentration of lanthanum chlo ride solution on electrolytic product was mainly *** phase composition,micro morphology,particle size and chlorine content of the product were characterized,*** the conditions of this work,the product that forms by electrolysis of LaCl3 aqueous solution directly is La(OH)*** the initial concentration of LaCl3 changes from 0.1 to 0.5 mol/L,the current efficiency of La(OH)3 increases from 60%to 85%,the product roasted at 800℃for 1.5 h is La2O3,whose median particle size(D50)is 10-20μm,the mass fraction of chloride ion is less than 0.02 wt%.Additio nally,the prepared La2O3 particles are porous and non-spherical particle s,which are composed of small crystals with sheet structure.