K_(2)SO_(4)-KOH-H_(2)O三元水盐体系相平衡研究  

Study of Phase Equilibrium in Ternary Aqueous Salt Systems of K_(2)SO_(4)-KOH-H_(2)O

作　　者：应虎 邓强[1,3] 刘程琳 YING Hu;DENG Qiang;LIU Chenglin(Jiangxi Jinghao Salination Co.,Ltd.,Zhangshu 330046,China;East China University of Science and Technology,National Engineering Research Center for Integrated Utilization of Salt Lake Resources,Shanghai 200237,China;East China University of Science and Technology,Carbon-Calcium Cycle Collaborative Research Center,Shanghai 200237,China)

机构地区：[1]江西晶昊盐化有限公司,江西樟树330046 [2]华东理工大学,国家盐湖资源综合利用工程技术研究中心,上海200237 [3]华东理工大学,华理—江盐集团碳钙循环联合研究中心,上海200237

出　　处：《盐科学与化工》2024年第4期22-25,共4页Journal of Salt Science and Chemical Industry

摘　　要：我国可溶性钾资源极为匮乏,而如钾长石、明矾石等非水溶性钾矿资源非常丰富。研究以高浓度KOH溶液分解明矾石后形成的K_(2)SO_(4)-KOH-H_(2)O三元强碱水盐体系为研究对象,测量不同温度下K_(2)SO_(4)在KOH溶液中的溶解度,绘制了各温度下的三元相图,探索相平衡规律,为明矾石开发利用过程中K_(2)SO_(4)的分离提供基础数据。Soluble potassium resources are extremely scarce in our country,while nonwater-soluble potassium ore resources such as potassium feldspar and alunite are abundant.In this study,the ternary strong alkali-water-salt system K_(2)SO_(4)-KOH-H_(2)O formed by decomposing alunite with high-concentration KOH solution is taken as the research object.The changes in solubility of K_(2)SO_(4)in KOH solution at different temperatures were measured,and ternary phase diagrams at various temperatures were plotted to explore the equilibrium patterns.This study provides fundamental data for the separation of K_(2)SO_(4)during the development and utilization of alunite.

关 键 词：硫酸钾 氢氧化钾 溶解度 

分 类 号：TS311[轻工技术与工程]