| 摘要 |
PROBLEM TO BE SOLVED: To efficiently provide a thin plate-like silica porous material in a stable quality, which has excellent adsorption performance, causes no clogging of a filter material in a solid-liquid separation process after being used, and is suitable as an adsorbing material. SOLUTION: When the thin plate-like silica porous material is formed by mixing a silicic acid raw material powder and a lime raw material powder, each having an average particle diameter of≤10μm, in a molar ratio of CaO/SiO<SB>2</SB>of 1.0 to 4.0 when the powders are expressed in terms of SiO<SB>2</SB>and CaO, respectively, then subjecting the resulting mixture to a hydrothermal reaction in water or an aqueous solution of an alkali hydroxide to prepare slurry containing thin plate-like calcium silicate, and introducing an acidic substance to the slurry to dissolve and remove calcium oxide in the slurry, the hydrothermal reaction is performed in the presence of a seed crystal of the thin plate-like calcium silicate. COPYRIGHT: (C)2007,JPO&INPIT
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