Studies on the Use of Colloidal Gas Aphrons in Coflotation and Solvent Sublation Processes. a Comparison with the Conventional Technique

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Abstract
The application of colloidal gas aphrons (CGA) in coflotation and solvent sublation processes has been studied. The advantages with respect to the results obtained by conventional techniques have been compared. In the solvent sublation of methyl orange with hexadecyltrimethylammonium (HTABr) in 2-octanol, yields higher than 95% are reached in 6–7 min; while in the conventional technique 20 min is necessary to obtain a little lower yield. In the coflotation of Cu with Fe(OH)3 and HTABr, the separation percentage is higher than 95% in less than a minute in the absence of an induction time, which, on the contrary, amounts to 25 min in the conventional technique.