Process for selective flotation of phosphorus minerals

摘要

A process for selective flotation of phosphate minerals, wherein a compound of the formula 1a or 1b in which R1 is branched or unbranched C8-C24-alkenyl, R2 is branched or unbranched C1-C4-alkyl and M is hydrogen, ammonium, triethanolammonium, an alkali metal atom or an alkaline earth metal atom, is added as a collecting agent to the flotation suspension.