양이온 추출제와 아민의 혼합추출제에 의한 경희토류금속의 분리 = Separation of Light Rare Earth Elements by Solvent Extraction with a Mixture of Cationic and Tertiary Amine

다국어 초록 (Multilingual Abstract)

Rare earth elements with high purity are demanded for the manufacture of advanced materials. Light rare earth elements are contained in domestic monazite and Ni-MH batteries. In this paper, solvent extraction to separate the light rare earth elements from hydrochloric acid leaching solutions of these resources was discussed. A mixture of cationic and tertiary amine shows synergistic effect on the extraction of LREEs and the extent of pH decrease during extraction is reduced. The effect of solution pH on the extraction and synergism was reviewed. Acquisition of the operation data with mixer-settler on the separation of LREEs by this mixture is necessary to develop a process.

국문 초록 (Abstract)

희토류 원소는 첨단 산업용 소재의 구성 성분으로 고순도가 요구된다. 국내산 monazite광과 Ni-MH전지는 경희토류를 함유한 자원이다. 이러한 자원을 염산으로 침출한 용액에서 경희토류성분을 용매추출로 분리하는 공정에 대해 고찰하였다. 양이온 추출제와3차 아민의 혼합추출제로 경희토류를 추출시 상승효과가 있으며 pH 감소가 둔화된다. 혼합추출제 사용시 수상의 pH가 금속의 추출 및 상승효과에 미치는 영향을 분석하였다. 향후 양이온과 아민의 혼합추출제에 의한 경희토류 분리공정을 개발하기 위해서는mixer-settler의 조업 자료 확보가 필요하다

참고문헌 (Reference)

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