금속동결 전처리에 의한 유기이온 교환수지의 분쇄효과

임성팔; 김준형; 손종식

Journal of the Korean Industrial and Engineering Chemistry, Vol.1, No.1, 23-29, October, 1990

Export Citation

금속동결 전처리에 의한 유기이온 교환수지의 분쇄효과

The Effect of Rapid Freeze Pretreatment on Grinding of Organic Ion Exchange Resins

임성팔, 김준형, 손종식

초록

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 아키라 이온종류 역시 분쇄에 큰 영향을 미침을 관찰할 수 있었다.

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.

[References]

International Atomic Energy Agency, "Treatment of Spent Ion Exchange Resins for Storage and Disposal," IAEA Technical Report Series No. 254, Vienna (1985)
Valkiainen M, Ulla Vuorinen and Paula Uotila, "The Interaction of Bituminized Ion-Exchange Resins with Different Leachants," Mat. Res. Soc. Symp. Proc. 44, 977 (1985)
Airola C, Brodersen K, Wingefors S, Bonnevie-Svenden M, Forsstrom H, Waste Manage., 86, 501 (1986)
Scieszka SF, Powder Technol., 49, 191 (1987)
ASTM D-409, "Grindability of Coal by the Hard-grove Machine Method,"

[1] International Atomic Energy Agency, "Treatment of Spent Ion Exchange Resins for Storage and Disposal," IAEA Technical Report Series No. 254, Vienna (1985)

[2] Valkiainen M, Ulla Vuorinen and Paula Uotila, "The Interaction of Bituminized Ion-Exchange Resins with Different Leachants," Mat. Res. Soc. Symp. Proc. 44, 977 (1985)

[3] Airola C, Brodersen K, Wingefors S, Bonnevie-Svenden M, Forsstrom H, Waste Manage., 86, 501 (1986)

[4] Scieszka SF, Powder Technol., 49, 191 (1987)

[5] ASTM D-409, "Grindability of Coal by the Hard-grove Machine Method,"