Alkali Hydrothermal Synthesis of Zeolite A Using Oxide By-products

作者：Murakami Taichi^*; Sugano Yoshiyuki; Kinami Tsunetoshi; Narushima Takayuki; Iguchi Yasutaka; Ouchi Chiaki

来源：ISIJ International, 2011, 51(1): 158-165.

DOI：10.2355/isijinternational.51.158

• zeolite A
• hydrothermal synthesis
• heat-storage materials
• slag

The alkali hydrothermal synthesis of zeolite A using oxide by-products such as blast furnace (BF) slag and aluminum dross was investigated. Na-P1 (Na(6)Al(6)Si(6)O(32) center dot 12H(2)O) was synthesized directly in NaOH aqueous solution for 86.4 ks at 373 K using BF slag, Al(2)O(3), and SiO(2). On the other hand, zeolite A was successfully synthesized by a two-step method including an elution treatment of Al(2)O(3). 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, SiO(2), and aluminum dross residue was measured, and it was 184 J/g, being higher than that of commercial zeolite A.

• 出版日期2011