화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.19, No.6, 668-673, December, 2008
Export Citation
니켈-몰리브데늄 성분계 폐촉매로부터 니켈의 선택적 회수
Selective Ni Recovery from Spent Ni-Mo-Based Catalysts
이태교, 한기보, 윤석훈, 이태진†, 박노국1, 장원철2
  • 영남대학교 디스플레이화학공학부
  • 1영남대학교 청정기술연구소
  • 2(주) 코캣
Tae Kyo Lee, Gi Bo Han, Suk Hoon Yoon, Tae Jin Lee†, No-Kuk Park1, and Won Chul Chang2
  • National Research Laboratory, School of Display & Chemical Engineering, Yeungnam University, 721-749, Korea
  • 1Institute of Clean Technology, Yeungnam University, Gyeongbuk 721-749, Korea
  • 2KOCAT Inc., Seoul 153-801, Korea
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초록
본 연구의 목적은 니켈-몰리브데늄 성분계 폐촉매로부터 니켈 성분의 선택적 회수를 위한 습식 침출 및 추출공정에서의 반응조건 최적화이다. 폐촉매로부터 니켈 성분의 선택적 회수를 위한 과정으로 침출제를 사용하여 폐촉매로부터 니켈 성분을 용액으로 용해시키는 침출공정과 니켈 성분을 포함한 다양한 금속 성분들의 용액으로부터 니켈 성분의 선택적 추출공정으로 이루어진 2단계 공정이다. 침출공정에서는 필요한 다양한 침출제로 질산(HNO3), 탄산나트륨(Na2CO3) 및 탄산암모늄((NH4)2CO3) 수용액 등이 사용되었으며, 추출제로 옥살산 수용액이 사용되었다. 침출공정에서 니켈성분을 효과적으로 용해시킬 수 있는 침출제는 질산 수용액이었으며, 최적화된 온도, 침출제농도, 반응시간 등은 각각 90 ℃, 6.25 vol%, 3 h이었다. 이러한 최적화된 침출공정 및 추출공정으로부터 얻어진 니켈 화합물은 니켈 옥살레 이트로 확인되었으며, 니켈 성분의 회수율 및 순도는 각각 88.7% 및 100%였다.
The objective of this study is to optimize the leaching conditions of sequential leaching and extracting processes for selective Ni recovery from spent Ni-Mo-based catalyst. The selective Ni recovery process consists of two processes of leaching and extracting process. In this 2-step process, Ni component is dissolved from solid spent Ni-Mo-based catalyst into leaching agent in leaching process and sequentially extracted to Ni complex with an extracting agent in the extracting process. The solutions of nitric acid (HNO3), ammonium carbonate ((NH4)2CO3) and sodium carbonate (Na2CO3) were used as a leaching agent in leaching process and oxalic acid was used as an extracting agent in extracting process. HNO3 solution is the most efficient leaching agent among the various leaching agent. Also, the optimized leaching conditions for the efficient and selective Ni recovery were the leaching temperature of 90 ℃, HNO3 concentration of 6.25 vol% and elapsed time of 3 h. As a result, Nickel oxalate having the highest yield of 88.7% and purity of 100% was obtained after sequentially leaching and extracting processes under the optimized leaching conditions.
Keywords:spent Ni-Mo-based catalysts;optimization of leaching condition;selective nickel recovery;wet recovery process
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