Hydrothermal synthesis of smectite from dickite
Ryu, Kyoung-Won (Chungbuk University. Department of Earth and Environmental Sciences)
Jang, Young-Nam (Korea Institute of Geoscience and Mineral Resources. Minerals and Materials Processing Division)
Chae, Soo-Chun (Korea Institute of Geoscience and Mineral Resources. Minerals and Materials Processing Division)
Bae, In-Kook (Korea Institute of Geoscience and Mineral Resources. Minerals and Materials Processing Division)
Choi, Sang-Hoon (Chungbuk University. Department of Earth and Environmental Sciences)

Fecha:	2006
Resumen:	Dioctahedral smectite was prepared hydrothermally from dickite [AlSiO(OH)] as a starting material by autoclaving in a closed stainless steel vessel with variable temperature, pressure, time and pH conditions. Highly crystalline smectite can be obtained at 290°C under a pressure of 69 bar for 48 h. The pH of the solution was an important factor and should be maintained at 10 to 11 for the successful formation of smectite. Characterization by X-ray powder diffraction, scanning electron microscopy, infrared spectroscopy, thermogravimetric analysis, differential thermal analysis and the Greene-Kelly test showed that the smectite synthesized was Na-beidellite, mostly because of the heat treatment of the starting material and the stoichiometric batch composition.
Derechos:	Tots els drets reservats.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Beidellite ; Greene-Kelly Test ; Hydrothermal Synthesis ; Smectite
Publicado en:	Clays and Clay Minerals, Vol. 54, Núm. 1 (2006) , p. 80-86, ISSN 1552-8367

DOI: 10.1346/CCMN.2006.0540110

7 p, 835.1 KB  Acceso restringido a la UAB

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