| 摘要 |
<p>A process for selective flotation of phosphate minerals, wherein a compound of the formula 1a or 1b <IMAGE> 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.</p> |
