The Extraction Fraction of Al<SUB>2</SUB>O<SUB>2</SUB> & SiO<SUB>3</SUB> by Acid & Alkali in Allophanes
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概要
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Allophane is a special kinds of clay mineral widely distributed in Japan, this is itself hydrated amorophous aluminium silicate gel. The Si0<SUB>2</SUB>/Al<SUB>2</SUB>0<SUB>3</SUB> of allophane depends on the producing place.<BR>The charactristic of Terauchi-do was studied by H. Tanaka. But Kisodo, Kitakami-do and Osawa-do are not studied. So, these allophanes were studied dissolution charactristic in liquid phase by NaOH solution, physical properties, analysis by Infrared spectroscopy & X-ray, the effect of Si0<SUB>2</SUB>/Al<SUB>2</SUB>O<SUB>3</SUB> mol. ratio in allophane and chemical composition of these allophanes on synthesis of zeolite.<BR>The result, these allophanes showed the special dissolution charactristic. The extraction fraction of alumina in allophane increased with treating time becoming longer. But, the treating time becoming longer, the extractive fraction of silica in allophane increased temporarily and then decreased rapidly. This charactristic can be estimated originating in the action of Si0<SUB>2</SUB> & Al<SUB>2</SUB>0<SUB>3</SUB> in liquid phase and synthesizing of zeolite.
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