セピオライトの酸処理結果について (I)

概要

論文の詳細を見る
The mechanism of dissolution of Mg^<2+> from sepiolite by treating with aqueous solution of hydrogene chloride was studied. Sepiolite used was a pure one of α-type from Korea. X-ray diffraction patterns of specimens treated with constant treating time (1hr) do not differ from non-treated powder up to 1N concentration. Above IN, the intensities of diffraction peaks decrease with increasing acid concentration. X-ray diffraction patterns of the specimens treated with 3N concentration from 1hr to 9hrs change with a similar tendency to those treated from 3N to 10N for 1hr and that treated with 3N concentration for 26hrs shows that this specimen is amorphous. Weight losses from 195℃ to 420℃ (W_2) and from 670℃ to 830℃ (W_4) which is caluculated by choosing 195℃ as a weight basis decrease with increasing degree of the acid treatment. It is clarified from the chemical analysis that Mg^<2+> included in the structure of sepiolite dissolves easily by the treatment with dilute acid solution. These results show that Mg^<2+> dissolves from the structure of sepiolite by acid treatment, accompanied with this, dehydration of bounded water occurs and as a result the structure of sepiolite changes.
日本粘土学会の論文
1973-12-25