Environment·Health·Safety

Extraction of rubidium and cerium salts from lithium tail liquid of medium and low grade lithium clay by ammonium sulfate process

  • Yuelong Liu ,
  • Linlin Wang ,
  • Gousheng Liu
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  • 1. School of Chemistry and Chemical Engineering,Jiangxi Science and Technology Normal University,Nanchang 330013,China
    2. School of Chemical Engineering,East China University of Science and Technology
    3. College of Chemistry,Nanchang University

Received date: 2020-05-17

  Online published: 2020-12-01

Abstract

The technical route of preparing lithium carbonate by ammonium sulfate process was studied for the medium and low grade lithium clay with w(Li2O)<2.0% in Yifeng.The precious metals such as rubidium and cesium from the lithium extraction mother liquor were further studied.The mother liquor after carbonization and extraction of lithium contains several dissolved sulfates of metals such as rubidium and cesium.Using stepwise crystallization method,the less soluble alum salts such as rubidium and cesium,were precipitated in the previous step of higher temperature,while alum salts such as potassium and ammonium were precipitated in the later step of lower temperature.By this way,the rubidium and cesium alum and ammonium and potassium alum were separated.The alum salts such as aluminum potassium sulfate and aluminum ammonium sulfate were roasted at high temperature to decompose as potassium sulfate and alumina.

Cite this article

Yuelong Liu , Linlin Wang , Gousheng Liu . Extraction of rubidium and cerium salts from lithium tail liquid of medium and low grade lithium clay by ammonium sulfate process[J]. Inorganic Chemicals Industry, 2020 , 52(11) : 60 -63 . DOI: 10.11962/1006-4990.2019-0626

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