Preparation of High-Purity Lithium Hydroxide Monohydrate from Technical-Grade Lithium Carbonate by Membrane Electrolysis

Ryabtsev, A. D.; Nemkov, N. M.; Kotsupalo, N. P.; Serikova, L. A.

doi:10.1023/b:rjac.0000044158.61704.93

Cited by 20 publications

(21 citation statements)

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“…45% current efficiency; at 8% LiOH, c . 20% current efficiency) . Thus it may be claimed that for this process, Nafion membrane is likely to be superior due to better rejection of hydroxides through the membrane.…”

Section: Resultsmentioning

confidence: 99%

“…Electrochemical splitting studies of sodium sulphate (Na 2 SO 4 ), potassium sulphate (K 2 SO 4 ) and Li 2 SO 4 salts can be found in the literature . With the help of this electrochemical salt splitting process, hydroxides such as lithium hydroxide can be produced from their salts.…”

Section: Introductionmentioning

confidence: 99%

“…Ryabtsev et al , in their study to produce lithium hydroxide, studied the performance of MK‐40 membrane . They converted lithium carbonate to lithium sulphate, which is then alkalinized to remove impurities as hydroxide precipitates.…”

Section: Introductionmentioning

confidence: 99%

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The behaviour of Nafion® 424 membrane in the electrochemical production of lithium hydroxide

Turan

Baloglu

Ünveren

et al. 2015

J of Chemical Tech & Biotech

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BACKGROUND: Nafion ® membranes have found several applications in chemical processes, one of which is 'salt splitting', where a salt is split to produce acid and/or alkali. So, the determination of the behaviour of this membrane in the electrolysis of certain salts is an important issue. The aim of this study is to investigate the performance of Nafion ® 424 membrane in a two-compartment membrane cell for the membrane electrolysis of lithium sulphate (Li 2 SO 4 ), where lithium hydroxide (LiOH) is the target product. RESULTS: Regression analysis was performed between conductivity and concentration to predict instantaneous electrolyteconcentration. The effects of catholyte concentration (4-8% LiOH), current density (4-16 A dm −2 ) and temperature (30-60 ∘ C) were investigated. 45-70% current efficiency; 6.1-14.6 kWh kg −1 LiOH power consumption and 140-900 g LiOH m −2 membrane h −1 production rate were obtained. A cost estimation revealed that 60 ∘ C, 8% LiOH and 4 A dm −2 are the optimum parameters within the studied range. CONCLUSION: Concentration can be successfully predicted for lithium sulphate and lithium hydroxide with the help of conductivity-concentration regression equations. Current efficiency is affected primarily by LiOH concentration with a direct proportion. Power consumption increases with the increase of current density and the decrease of temperature. Based on production cost estimation, optimum working parameters can be recommended.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The behaviour of Nafion® 424 membrane in the electrochemical production of lithium hydroxide

Turan

Baloglu

Ünveren

et al. 2015

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…Nemkov et al [12] Indicates that the Lithium hydroxide obtaining process from Lithium carbonate is inefficient if it is performed directly, consequently they convert the lithium carbonate to lithium sulfate, by sulfuric acid addition, after separate the lithium form the solution by electrolysis membranes [13]. This process could be used for lithium recovering from wastes containing lithium.…”

Section: Introductionmentioning

confidence: 99%

“…For example, to obtain a high quality LiOH$H 2 O, a high degree of purity of the starting components is required. Moreover, taking into account the low solubility of Ca(OH) 2 , this process is characterized by the low yield of LiOH in solution and great loss of Li þ , all associated with the necessity of washing and settling voluminous precipitates of CaCO 3 [12].…”

Section: Introductionmentioning

confidence: 99%