Method for CO2 Treatment of Tempered Lithium-Containing Materials for the Production of Lithium Carbonate

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This invention describes a method for producing lithium carbonate from lithium-containing minerals. The process involves heating the minerals to convert them into a more reactive form, then treating them with CO2 under pressure in water, which results in the formation of lithium hydrogencarbonate. This solution is then concentrated and lithium carbonate is precipitated from it, achieving high yields and purity.

Use CasesContent extracted from patent full text and abstract with AI.

• Production of high-purity lithium carbonate for use in battery manufacturing, especially for lithium-ion batteries.
• Extraction of lithium from mineral sources for industrial and chemical applications.
• Supplying lithium compounds for glass, ceramics, and pharmaceutical industries.
• Improving the efficiency of lithium extraction plants.

BenefitsContent extracted from patent full text and abstract with AI.

• High lithium recovery rates (>80%) from mineral sources, improving efficiency.
• High purity of produced lithium carbonate (>95%), suitable for demanding applications like batteries.
• Reduction in chemical reagent usage due to CO2 treatment, making the process more environmentally friendly.
• Enables the use of mineral sources rather than brines, potentially diversifying raw material supply.

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Patent Abstract

Die Erfindung betrifft ein Verfahren zur Herstellung von Lithiumcarbonat aus lithiumhaltigen Mineralien, mit den Schritten a) Temperung der zerkleinerten Mineralien bei 950 bis 1.200°C im sauerstoffhaltigen Gasstrom zur Umwandlung der lithiumhaltigen Mineralphase in β-Spodumen b) Aufschluss der zerkleinerten β-Spodumen-Mineralphase in wässriger Suspension unter Druck mit CO2 und Umsetzung zu Lithiumhydrogencarbonat c) Konzentrierung der lithiumhydrogencarbonathaltigen Lösung und Ausfällung des Lithiumcarbonats Es werden Lithiumaufschlussraten von > 80% und Reinheiten des Lithiumcarbonats von > 95% erzielt.