Fe-セピオライトの塩酸処理 : Fe-セピオライトの鉱物学的研究・第2報

概要

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Fe-sepiolite was digested with large excesses of hydrochloric acid at constant temperature of 10, 25, and 40℃, for various time. The results were compared with the experimental data for Mg-sepiolite. The acid dissolution of Fe-sepiolite found to be of first order with respect to residual Fe and Mg and also with respect to concentration of hydrochloric acid, as a whole. However, it also obeyed diffusion controlled kinetics proposed by Jander (1927), especialy in the initial part of the reaction. The reaction rate for Fe in Fe-sepiolite was larger than for Mg in Fe-sepiolite. The activation energies for Fe and Mg in Fe-sepiolite obtained from the first order kinetics were 18.1 and 16.9 kcal/mol, respectively. These values were similar to that for Mg in Mg-sepiolite.
日本粘土学会の論文
1991-08-30