Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Separation of Uranium(VI) and Vanadium(V) from Sulfuric Acid Media by Amine Based Extractants through Liquid-liquid Extraction Technique

황산 용액으로부터 아민계 추출제의 액-액 추출법에 의한 우라늄(VI)과 바나듐(V)의 분리

  • Jeon, Jong-Hyuk (Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Lee, Jin-Young (Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Kim, Joon Soo (Institute of Research and Development, Wongwang Electric Power Corporation) ;
  • Yoon, Ho-Sung (Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Jyothi, Rajesh Kumar (Korea Institute of Geoscience and Mineral Resources (KIGAM))
  • Received : 2021.07.28
  • Accepted : 2021.08.12
  • Published : 2021.08.31
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Abstract

The importance of uranium metal is growing day by day in light of its increasing global demand for fulfilling societal needs through atomic power programs. Considering the high demand for uranium, it is necessary to find innovative hydrometallurgical techniques to separate uranium from other associated elements, especially vanadium. This study deals with the separation of uranium(VI) and vanadium(V) from sulfuric acid solutions using commercial amine-based extractants diluted in kerosene. The concentrations of the sulfuric acid solutions ranged from 0.005 to 5.0 mol/L. The effect of extractant concentration ranging from 0.005 to 0.2 mol/L was studied. The temperature was maintained at 25℃ and the experiment was performed for 30 min at an aqueous: organic phase ratio of 1 (A:O = 1:1). The calculated separation factors (SFs) are presented and comparisons are made among all the experiments.

원자력 발전 프로그램에 의해 세계 우라늄 메탈의 수요가 증가함에 따라 우라늄 메탈의 중요도는 날로 증가하고 있다. 이러한 우라늄 수요의 높은 증가로 인해 주로 바나듐을 비롯한 다른 원소들로부터 우라늄을 회수하고자 하는 새로운 추출법들이 더욱 중요하게 되었다. 본 연구에서는 kerosene에 희석된 상업용 아민 기반 추출제를 사용하여 황산 용액에서 우라늄(VI)과 바나듐(V)을 분리하는 방법을 다루었다. 0.005 ~ 5.0 mol/L농도의 황산 용액과 0.005 ~ 0.2 mol/L농도의 추출제를 사용하였다. 모든 실험은 25℃에서 30분동안 동일한 수상과 유기상의 비율(A:O = 1:1)로 수행하였다. 실험 결과 값으로부터 계산된 분리 계수(SF's)를 제시하고 모든 실험 값과 비교하였다.

Keywords

Acknowledgement

This work was supported by the Energy Efficiency and Resources (Physical and Chemical mineral dressing/refining of low grade uranium ore) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea Government Ministry of Knowledge Economy. This work was supported by the National Research Council of Science & Technology (NST) grant by the Korean government (MSIT) (No.CRC-15-06-KIGAM). Thanks are also for Cognis Company, USA for providing all amine based extractants as gift samples. Authors are very much thankful to EMC 2011 for accepted the present data as oral presentation.

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