Production of Lithium Hydroxide from Lake Brines through Electro鈥揈lectrodialysis with Bipolar Membranes (EEDBM)

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• 作者：Chenxiao Jiang ; Yaoming Wang ; Qiuyue Wang ; Hongyan Feng ; Tongwen Xu
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：April 9, 2014
• 年：2014
• 卷：53
• 期：14
• 页码：6103-6112
• 全文大小：598K
• 年卷期：v.53,no.14(April 9, 2014)
• ISSN：1520-5045

文摘

To investigate the feasibility of a novel method to produce LiOH from lithium contained brine, A lab-scale electro鈥揺lectrodialysis with bipolar membrane (EEDBM) was installed with an arrangement of bipolar membrane鈥揷ation exchange membrane鈥揵ipolar membrane鈥揷ation exchange membrane in series. Conventional electrodialysis (CED) stack configured with repeat-arranged five cation exchange membranes and four anion exchange membranes was installed as a pretreatment process. After preconcentrating and precipitating brine with CED and Na₂CO₃, a high purity of ca. 98% Li₂CO₃ powder was obtained. The influence of current density and feed concentration on the production of LiOH was investigated. EEDBM Process cost is estimated to 2.59 $/kg at current density of 30 mA/cm² and feed concentration of 0.18 M. It can be inferred that lower energy consumption would be obtained at the case of scaling up. Considering the environmental aspects, the corporate process for LiOH production is also mutually beneficial.