Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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The Effect of Rapid Freeze Pretreatment on Grinding of Organic Ion Exchange Resins

금속동결 전처리에 의한 유기이온 교환수지의 분쇄효과

  • Yim, Sung-Pal (Korea Atomic Energy Research Institute, Radwaste Treatment Technology Dept.) ;
  • Kim, Joun-Hyeong (Korea Atomic Energy Research Institute, Radwaste Treatment Technology Dept.) ;
  • Son, Jong-Sik (Korea Atomic Energy Research Institute, Radwaste Treatment Facility Dept.)
  • 임성팔 (한국원자력연구소 처리기술실) ;
  • 김준형 (한국원자력연구소 처리기술실) ;
  • 손종식 (한국원자력연구소 시설운영실)
  • Received : 1990.07.26
  • Published : 1990.10.31
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Abstract

The effect of a rapid freeze pretreatment of organic ion exchange resins on their grinding properties was studied. It was found that the structure of ion exchange resins was defected by freezing pressure formed in the process of rapid freezing. The defected resins didn't recover their own structure after thawing and those could be easy to be broken at room temperature by small force. Therefore, organic ion exchange resins could be ground readily at room temperature after rapid-freezing the fully swelled resins using by solid carbon dioxide, or liquid nitrogen. The rapid freeze pretreatment of cation exchange resins was very effective on grinding in particular. However, the effect of the pretreatment of anion exchange resins on grinding was less than that of cation exchange resins. In case of anion exchange resins, the ionic form of affected the grindability remarkably.

급속동결 전처리가 유기이온교환 수지의 분쇄에 미치는 효과를 연구하였다. 습윤상태의 이온교환 수지를 고체탄산 또는 액체질소를 이용하여 급속동결하면 이온교환 수지의 내부구조가 물리적으로 파괴되며 일단 파괴된 수지는 다시 실온이 되어도 원래의 상태로 회복되지 않음을 발견하였다. 따라서 급속동결한 수지는 실온에서도 분쇄가 매우 용이하며 이 효과는 양이온교환 수지가 음이온교환 수지에 비하여 더 크게 나타났다. 아울러 음이온교환 수지의 경우, 급속동결 전처리 효과 뿐만 아니라 이온종류 역시 분쇄에 큰 영향을 미침을 관찰할 수 있었다.

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