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Hydrothermal Synthesis of Smectite from Zeolite  

Chae, Soo-Chun (Minerals and Materials Processing Division, Korea Institute of Geoscience and Mineral Resources)
Kim, You-Dong (Minerals and Materials Processing Division, Korea Institute of Geoscience and Mineral Resources)
Jang, Young-Nam (Minerals and Materials Processing Division, Korea Institute of Geoscience and Mineral Resources)
Bae, In-Kook (Minerals and Materials Processing Division, Korea Institute of Geoscience and Mineral Resources)
Ryu, Kyung-Won (Department of Earth and Environmental Sciences)
Lee, Sung-Ki (University Science and Technology)
Publication Information
Journal of the Mineralogical Society of Korea / v.19, no.4, 2006 , pp. 301-310 More about this Journal
Abstract
Smectites were synthesized from Na-P type and Na-A type zeolites by the hydrothermal synthetic method, and their physicochemical properties were studied. The optimal synthetic conditions for producing smectite were $290^{\circ}C$, 72 hr and $75{\sim}100kgf/cm^2$ in autogenous pressure. pHs of initial reaction solutions for the synthesis of smectites from Na-P type and Na-A type zeolite s were pH 6 and pH 10, respectively. The synthetic smectite was confirmed as $12{\AA}$-beidellite by a series of analysis such as X-ray diffraction analysis with random and oriented mounts, ethylene glycol treatment, and Greene-Kelly test, and their several physicochemical properties were studied.
Keywords
smectite; beidellite; hydrothermal synthesis; zeolite; Greene-Kelly test;
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