Alkali Hydrothermal Synthesis of Zeolite A Using Oxide By-products

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概要

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• 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.

著者

• NARUSHIMA Takayuki

  Department of Materials Processing, Tohoku University

• Murakami Taichi

  Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

• Sugano Yoshiyuki

  Graduate Student, Tohoku University

• Kinami Tsunetoshi

  Department of Materials Processing, Graduate School of Engineering, Tohoku University

• Iguchi Yasutaka

  Professor Emeritus, Tohoku University

• Ouchi Chiaki

  Professor Emeritus, Tohoku University

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