ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
Alkali Hydrothermal Synthesis of Zeolite A Using Oxide By-products
Taichi MurakamiYoshiyuki SuganoTsunetoshi KinamiTakayuki NarushimaYasutaka IguchiChiaki Ouchi
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2011 Volume 51 Issue 1 Pages 158-165

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Abstract

The alkali hydrothermal synthesis of zeolite A using oxide by-products such as blast furnace (BF) slag and aluminum dross was investigated. Na–P1 (Na6Al6Si6O32·12H2O) was synthesized directly in NaOH aqueous solution for 86.4 ks at 373 K using BF slag, Al2O3, and SiO2. On the other hand, zeolite A was successfully synthesized by a two-step method including an elution treatment of Al2O3. Under optimal conditions, the formation ratio of zeolite A in various compounds contained in the product was 56%. The utilization of dross residue squeezed out from the aluminum dross as a raw material to synthesis of zeolite A let this ratio increase to 60%. The heat of water adsorption of the product synthesized by the two-step method using BF slag, SiO2, and aluminum dross residue was measured, and it was 184 J/g, being higher than that of commercial zeolite A.

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© 2011 by The Iron and Steel Institute of Japan
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