Recovery of Li2CO3 by membrane crystallization with ion-exchange hollow fibers

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Recovery of Li2CO3 by membrane crystallization with ion-exchange hollow fibers

Popis výsledku v původním jazyce

Introduction. The demand for lithium has significantly increased in recent years, primarily due to the development of electromobility and the need for lithium batteries. The interest in lithium is so high that the price of lithium surged by almost 300% between 2020 and 2021. [1] Fulfilling this demand requires large quantities of lithium salts, which represent approximately 65% of the global demand for lithium, such as Li2CO3, which has broad commercial applications not only in Li-ion batteries but also in the pharmaceutical industry. Meeting this demand would necessitate a substantial increase in mining and processing of lithium ores, which, however, would lead to significant environmental pollution. Therefore, a considerable amount of research is focusing on obtaining lithium from secondary sources such as electronic waste, old batteries, wastewater and brines. Several different technologies have been proposed and investigated for this purpose, including evaporation, precipitation, electrodialysis-metathesis, nanofiltration, FO, and others. However, the drawbacks of most investigated technologies include their low efficiency, high energy and chemical consumption, environmental burden, expensive materials, and the questionable scale-up process to industrial size. Experimental/methodology. In this work, membrane crystallization of lithium carbonate was studied using a module with anion-exchange hollow fibres. The process couples Donnan dialysis with precipitation. As a feed, model solutions based on real solutions were tested. The Influence of various parameters on mass transfer, product purity and crystals size was studied. Results and discussion. Membrane crystallization with ion-exchange hollow fibres could be a promising technology for obtaining lithium salts, especially Li2CO3, from various solutions. The advantage lies in the selective transport of ions through membranes and the low pressure required for operation. Regarding the precipitation of Li2CO3, its higher solubility allows for a more uniform distribution of supersaturation in the solution, not just in the vicinity of the membrane surface. Higher temperature improved mass transfer through membranes and facilitated crystallization of Li2CO3. Increasing the temperature can not only achieve faster crystallization but also faster ion transport through the membranes. Crystals of Li2CO3 were obtained with high purity without inorganic impurities.

Název v anglickém jazyce

Recovery of Li2CO3 by membrane crystallization with ion-exchange hollow fibers

Popis výsledku anglicky

Introduction. The demand for lithium has significantly increased in recent years, primarily due to the development of electromobility and the need for lithium batteries. The interest in lithium is so high that the price of lithium surged by almost 300% between 2020 and 2021. [1] Fulfilling this demand requires large quantities of lithium salts, which represent approximately 65% of the global demand for lithium, such as Li2CO3, which has broad commercial applications not only in Li-ion batteries but also in the pharmaceutical industry. Meeting this demand would necessitate a substantial increase in mining and processing of lithium ores, which, however, would lead to significant environmental pollution. Therefore, a considerable amount of research is focusing on obtaining lithium from secondary sources such as electronic waste, old batteries, wastewater and brines. Several different technologies have been proposed and investigated for this purpose, including evaporation, precipitation, electrodialysis-metathesis, nanofiltration, FO, and others. However, the drawbacks of most investigated technologies include their low efficiency, high energy and chemical consumption, environmental burden, expensive materials, and the questionable scale-up process to industrial size. Experimental/methodology. In this work, membrane crystallization of lithium carbonate was studied using a module with anion-exchange hollow fibres. The process couples Donnan dialysis with precipitation. As a feed, model solutions based on real solutions were tested. The Influence of various parameters on mass transfer, product purity and crystals size was studied. Results and discussion. Membrane crystallization with ion-exchange hollow fibres could be a promising technology for obtaining lithium salts, especially Li2CO3, from various solutions. The advantage lies in the selective transport of ions through membranes and the low pressure required for operation. Regarding the precipitation of Li2CO3, its higher solubility allows for a more uniform distribution of supersaturation in the solution, not just in the vicinity of the membrane surface. Higher temperature improved mass transfer through membranes and facilitated crystallization of Li2CO3. Increasing the temperature can not only achieve faster crystallization but also faster ion transport through the membranes. Crystals of Li2CO3 were obtained with high purity without inorganic impurities.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20402 - Chemical process engineering

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů