PHASE STUDIES OF LONG-CHAIN ALKANOL COMPLEXES WITH ALKYLAMMONIUM LAYER SILICATES

Measurements of basal spacings of n-tetradecylammonium-n-tetradecanol complexes of beidellite and montmorillonite in a wide range of tetrade canol concentrations have been carried out. Three different intercalat e phases have been established at room temperature. In definite concen tration ranges two of the phases coexist. These miscibility gaps disap pear when the temperature is increased above 80-degrees-C. They appear again at cooling. This reversibility with temperature confirms the eq uilibrium nature of the phases observed. Additional information about the structure of the phases has been obtained by basal spacing measure ments at constant temperature and alkanol concentration with all nine members of the n-alkyl homologs with 10 to 18 carbon atoms in the chai ns. The structures of the interlayers in the different phases have bee n discussed.