Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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A Comparison Study on the Separation Process of TaCl5 from the Chlorinated Reaction Product

염화반응법으로 제조된 TaCl5의 분리공정에 관한 비교 연구

  • Cho, Jung-Ho (Department of Chemical Engineering, Dong Yang University) ;
  • Park, So-Jin (Department of Chemical Engineering, Chungnam National University) ;
  • Choi, Young-Yoon (Minerals and Materials Processing Division, Korea Institute of Geoscience and Mineral resources)
  • 조정호 (동양대학교 생명화학공학부) ;
  • 박소진 (충남대학교 바이오응용화학부) ;
  • 최영윤 (한국지질자원연구원 자원활용연구부)
  • Received : 2006.02.08
  • Accepted : 2006.05.09
  • Published : 2006.06.30
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Abstract

The separation and purification of $TaCl_5$is indispensable in the synthetic process of $TaCl_5$by chlorination of tantalum oxide. The reaction products are mainly $TaCl_5$, $NbCl_5$, $TiCl_4$ and $FeCl_2$. However, we need to separate $TaCl_5/NbCl_5$ mixture from the reaction product, because $TaCl_5$ and $NbCl_5$ are easily separated each other by distillation or hydrogen reduction process. In this work, a comparison study was carried out between direct sequence and indirect sequence to obtain $TaCl_5/NbCl_5$ mixture from the reaction product by removing light component, $TiCl_4$ and heavy component, $FeCl_2$ using two distillation columns. It was concluded that the direct sequence gave better results than indirect sequence in the aspect of initial capital costs and the associative operating costs.

염화반응에 의한 $TaCl_5$의 제조에서 반응생성물 중 $NbCl_5$, $TiCl_4$, $FeCl_2$ 등이 주요 불순물로 존재하게 된다. $TaCl_5$와 $NbCl_5$는 증류나 수소 환원법에 의해 쉽게 분리가 되므로, 반응생성물에서 $TaCl_5/NbCl_5$ 혼합물을 99.9％ 이상 순도로 분리하기 위해 2기의 연속식 증류공정을 사용하여 light한 성분과 heavy한 성분을 제거하는 공정을 구성하였다. 본고에서는 순차배열(direct sequence)과 비 순차배열(indirect sequence)으로서의 두 분리공정에 대한 비교연구를 상용성 화학공정모사기인 Aspen Plus 13.1을 이용해서 전산모사를 수행하였다. 비교결과 순차배열이 비 순차배열에 비하여 초기 장치투자비용이나 운전비용에서 좀 더 우수한 것으로 나타났다.

Keywords

Acknowledgement

Supported by : 한국지질자원연구원

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