Extraction of valuable metals from lepidolite

Yan, Qunxuan; Li, Xinhai; Wang, Zhixing; Wu, Xifei; Guo, Huajun; Hu, Qiyang; Peng, Wenjie; Wang, Jiexi

doi:10.1016/j.hydromet.2012.02.004

Cited by 84 publications

(28 citation statements)

References 6 publications

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“…Moreover, it has important applications in pharmacy and medicine, especially soporifics and sedatives and the treatment of epilepsy [3,5,6]. Because of the numerous applications of Rb in science, technology and medicine and its low extractability from natural systems and wastes, the demand for and price of Rb in recent decades have increased in the international market [7][8][9][10]. For example, the price for 100 g of Rb rose from US$998 in 2001 to US$1283 in 2010 [2,9].…”

Section: Introductionmentioning

confidence: 99%

Rubidium recovery using potassium cobalt hexacyanoferrate sorbent

Nur

Naidu

Loganathan

et al. 2016

Desalination and Water Treatment

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A B S T R A C TRubidium (Rb) is a highly valued and economically important metal present in large quantities in many natural and wastewaters. However, its recovery is hampered by its low concentration and extracting agents' limited selectivity. A batch sorption study showed that a potassium cobalt hexacyanoferrate (KCoFC) sorbent had much higher sorption capacities for Rb and caesium (Cs) than for lithium (Li), sodium (Na) and calcium (Ca). Equilibrium sorption data at pH 7 and 24 ± 1˚C for Rb and Cs satisfactorily fitted to the Langmuir model with sorption maxima of 96 and 61 mg/g, respectively. A fixed-bed column (12 cm height) containing a mixture of 2.2 g KCoFC and 19.8 g granular activated carbon had a breakthrough sorption capacity of 61 mg/g when a solution containing 5 mg Rb/L was passed through the column at a velocity of 2.5 m/h (0.7 L/h). When 1 and 5 mg Cs/L were added to the Rb solution, Rb sorption capacity dropped to 46 and 41 mg/g, respectively. During Rb sorption, K from the KCoFC lattice was released. Leaching the column containing sorbed Rb with 0.1 M KCl for 60 min at a velocity of 10 m/h desorbed 99% of sorbed Rb. A process for recovering Rb from sea water reverse osmosis brine is presented.

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Section: Introductionmentioning

confidence: 99%

Rubidium recovery using potassium cobalt hexacyanoferrate sorbent

Nur

Naidu

Loganathan

et al. 2016

Desalination and Water Treatment

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“…Roasting at 880 o C with a mass ratio of lepidolite/ Na 2 SO 4 / CaCl 2 of 1:0.5:0.3 resulted in improved recovery (~95% Li) of lithium (Yan et al, 2012b). Above 99.5% pure lithium carbonate was obtained by evaporation and precipitation with Na 2 CO 3 .…”

Section: Acid Processmentioning

confidence: 99%

Extraction of lithium from primary and secondary sources by pre-treatment, leaching and separation: A comprehensive review

2014

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“…40,45,48 The presence of potassium as one of constituent elements of lepidolite compared to its absence in spodumene results in the formation of LiKSO 4 in roasted products, which requires high temperature leaching to achieve maximum recoveries of lithium. 40,45,48 The presence of potassium as one of constituent elements of lepidolite compared to its absence in spodumene results in the formation of LiKSO 4 in roasted products, which requires high temperature leaching to achieve maximum recoveries of lithium.…”

Section: Processing Of Lepidolitementioning

confidence: 99%