J. KIMS Technol Search


Journal of the Korea Institute of Military Science and Technology 2008;11(5):99-106.
Extraction of Impregnated Metals from Charcoal Active Carbon with Supercritical Carbon Dioxide
Jong-Chol Lee, Sam-Gon Ryu
초임계 이산화탄소에 의한 금속 담지 활성탄으로부터 담지금속의 추출
이종철, 류삼곤
국방과학연구소, 화생방부
Metal ions such as Cu and Cr were extracted from the Cu, Cr and Ag impregnated active carbon by contacting the solid surfaces with supercritical carbon dioxide(Sc-$CO_2$) containing chelating agents. About 10g of the active carbon sample were loaded in a vertical tube extractor contacting with $CO_2$ flowing from the bottom of the tube for 6hrs. The ligands used were acetyl acetone(AA) and Cyanex-302(C-302). Water and methanol were used as entrainers to study the effect of co-solvent to $CO_2$. Experimental results showed that C-302 was more effective than AA in removing Cu with the maximum extraction of 42.0wt%, while 57.6wt% of Cr was extracted with AA from the sample.
Key Words: Metal Extraction, Supercritical $CO_2$ Extraction, ASC-carbon, Chelating Agents
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