Low-Temp Process for Simultaneous Li Extraction, Energy Production and Decarbonization
EVs and renewable energy are driving a surge in lithium (Li) demand. Li is mainly produced either by concentrating brines from salt lakes or by extracting it from ores, primarily α-spodumene. Brine evaporation requires vast land, long processing times, and favorable climatic conditions. Ore processing requires roasting above 1000 ℃, followed by intensive sulfuric acid leaching, leading to high energy and chemical consumption. Moreover, the co-dissolution of Si and Al impurities complicates downstream purification, increasing both economic and environmental costs. The inventors developed a hydrothermal process that controls element behavior, enabling simultaneous Li recovery, hydrogen (H2) production, and CO2 mineralization at relatively low temperatures. For example, a NaHCO3 solution with olivine enables efficient and sustained Li extraction from α-spodumene at 300 ℃. Impurities such as Si and Al are immobilized as secondary minerals, simplifying purification. Meanwhile, Fe(II) and Mg in olivine contributed to concurrent H2 generate and CO2 mineralization.
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The revenue generated from technology transfer is reinvested as new research funding for universities and researchers, and is utilized to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will vigorously promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by signing basic technology transfer agreements with the following universities (as of June 1, 2025): Tohoku University, Hirosaki University, Iwate University, Akita University, Fukushima University, Yamagata University, Tohoku Gakuin University, Iwate Medical University, Fukushima Medical University, Aizu University, Miyagi University, Hokkaido University, Muroran Institute of Technology, and Showa Medical University.
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