Abstract:The two methods which have been most used for the preparation of electrolyte-free colloidal ferric hydroxide and aluminum hydroxide are in many respects unsatisfactory. The first, in which the hydroxide is formed by the hydrolysis of the acetate and the acetic acid removed by vigorous boiling was first proposed by Crum1 in 1853 for preparing colloidal aluminum hydroxide. Crum failed to prepare colloidal ferric hydroxide by this method but Péan de Saint-Gilles2 succeeded in doing so in 1855. The second method i… Show more
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