Abstract
The formation of highly surface-active ionomolecular complexes has been suggested recently to be a phenomenon that governs the pH-dependence of hematite flotation using oleate. The differential thermogravimetric work reported in the literature on alkylamine-alkylamine hydrochloride mixtures shows complete complexing of them when present in equimolar amounts. The pH dependence of quartz flotation using amine, speculated in the past to be due to various mechanisms, is discussed in the light of these results. The additional correlation obtained for flotation with surfactant complex formation suggests the role of such complexes in froth flotation to be of wide application.
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