| 摘要 |
<p>The invention relates to a method of separating phosphatic minerals from phosphate ores, especially from phosphate carbonate ores by flotation in the presence of a collector, which comprises a compound having the general formula X1-(CH2)1-Y-(CH2)m-X2 I or its salt, in which formula l and m are mutually independently 0 or 1, Y is -S-, -SO- or -OSO-, X1 and X2 are mutually independently -R or -CR(R'Z1)Z2, Z1 and Z2 are mutually independently -H, -OR, -COOR, -OCOR, -NR'COR, -CONR'R, -COSR, -CSOR, -COR or -SO3H or Z1 and Z2 form together with the carbon atoms to which they are bound the group <IMAGE> R and R' are mutually independently H or a hydrocarbon containing 1-30 carbon atoms, which may be straight chained or branched, saturated or unsaturated, aliphatic or aromatic, containing possibly one or several groups among -O-, -NH-, -OCO-, -COO-, -NR'CO-, -CONR'-, -CO-, provided however that the compound according to formula I contains at least one group among -COOH, -SO3H, <IMAGE> The invention also relates to an agent to be used in the flotation.</p> |
