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
1991 年 31 巻 2 号 p. 106-113
詳細
1991 年 31 巻 2 号 p. 106-113
Fe-sepiolite was digested with large excesses of hydrochloric acid at constant temperature of 10, 25, and 40°C, for various time. The results were corn pared 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 concentra tion of hydrochlori acid, as a whole. However, it also obeyed diffusion controlled kinetics proposed by Jan der (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 kinetic swere 18.1 and 16.9kcal/mol, respectively. These values were similar to that for Mg in Mg-sepiolite.
