Preparation of lithium hydroxide from lithium sulphate in a three-compartments membrane electrolysis system
Preparation of lithium hydroxide from lithium sulphate in a three-compartments membrane electrolysis system
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发表时间：
2006
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通讯作者：
Y. Lixin
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作者：
Y. Lixin
A three-compartment electrolysis reactor involving CEM(cation exchange membranes) and AEM(anion exchange membranes) was designed to carry out the production of lithium hydroxide from lithium sulphate.The electrolysis process was carried out under different current densities.In the range of current density of 500～1 800 A/m~2,the results show that the process was feasible.In the relative low current density,the experiment under 500 A/m~2 got the highest current efficiency and lowest energy consumption.The orthogonal experiments had been schemed to determine the influence of circulation flow rate,the initial concentrations of acid stream,base stream and salt stream on the process.The optimal reaction condition was determined and verified by experiments.Under the initial concentration: 2.7 mol/L of sulfuric acid,1.0 mol/L of lithium sulphate,1.0 mol/L of lithium hydroxide,30 L/h of the circulation flow,the current efficiency of 66.74%,energy consumption of 6.37 kW·h/kg LiOH was got,better than any group of the orthogonal experiments.
