Liquid-Liquid Extraction Unit, Multistage Liquid-Liquid Extraction Apparatus using the Unit, and M

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PURPOSE : A liquid-liquid extraction device, a multistage liquid-liquid extraction apparatus using the same, and a multistage continuous extraction system for rare earth elements are provided to reduce the size of the liquid-liquid extraction device with maintaining the extraction and separation efficiency of the rare earth elements.CONSTITUTION : A liquid-liquid extraction device comprises an extraction and separation tank (10), a water phase inlet (20), an organic phase inlet (30), an organic phase outlet (40), and a water phase outlet (50). The extraction and separation tank has a pair of side walls horizontally facing each other. The water phase inlet is arranged in the upper part of one side wall for receiving bubble type water phase. The organic phase inlet is arranged in the lower part of one side wall for receiving bubble type organic phase. The organic outlet is arranged in the upper part of the other side wall for discharging the separated organic phase. The water phase outlet is arranged in the lower part of the other side wall for discharging the separated water phase.COPYRIGHT KIPO 2013