| abstract |
Organic ionic collecting agents for the selective flotation of lead and zinc ores, said agents having the following general formula: <IMAGE> (I) wherein the symbols have the following meanings: R represents an alkoxyl group having from 3 to 12 carbon atoms; R1 represents H, a linear or branched chain alkyl group, an alkoxyl or hydroxyalkyl group containing up to 12 carbon atoms; X represents H, Cl, Br, I, F, CN, CONH2, NO2, SO2NH2; M represents H, Na, K, Li, Cs. |