Synergetic effect of a mixture of anionic and nonionic reagents: Ca mineral contrast separation by flotation at neutral pH

Rare earths (La, Ce, Nd) and rare metals (Sn, Nb, W) as by-products of kaolin production – Part 3: Processing of fines using gravity and flotation

“…This could also explain the different response to dispersion of the sodium oleate and hydroxamate, illustrated by the important decrease of flotation efficiency with sodium oleate without dispersion whereas no significant changes are observed with hydroxamate. Indeed, whereas sodium oleate is very sensitive to the presence of cations such as Ca 2+ (Filippova et al, 2014), the calcium complex is the least stable complex for hydroxamate (Table 3). Thus it is likely that both liberation of monazite surface from clay coatings and complexation of calcium by the dispersing agent are responsible for the higher performance of sodium oleate flotation with dispersion.…”

Synergetic Effect of the Mixed Anionic/Non-Ionic Collectors in Low Temperature Flotation of Scheelite

“…Wang et al, studied the flotation separation of muscovite from quartz using a mixed anionic/cationic collector of sodium oleate and dodecylamine, the results showed that the flotation behavior of muscovite was improved, and the adsorption of dodecylamine was enhanced by the co-adsorption of sodium oleate in the mixed collector system [12]. Filippov et al reported the synergetic effects of an alcoholic reagent (Exol) for Ca-bearing mineral flotation with sodium oleate, and the results showed that sodium oleate mixed with a nonionic reagent adsorbs onto scheelite surfaces, and the adsorption on the scheelite surface was increased for a constant oleate concentration [13,14].…”

Ionic-liquid collectors for rare-earth minerals flotation⿿Case of tetrabutylammonium bis(2-ethylhexyl)-phosphate for monazite and bastnäsite recovery

“…These collectors are mixtures of hydroxamic acids and alcohols that have been previously used as collectors in various flotation systems [56][57][58]. Aerofroth-70 (containing methyl isobutyl carbinol) was obtained from Cytec Canada and was used as frother in the course of micro-flotation tests.…”

“…Also, lateral chain-chain associative interactions, reminiscent of the adsorption of surfactants at solid/solution interface, may be invoked to explain the surface interaction of the IL cationic moiety. This interaction may occur through cation adsorption onto the first chemisorbed IL anionic layer [58,81,85,86] and with the aid of the London dispersion forces between the hydrophobic chains as seen in Figs. 14 and 15(c) [87,88].…”