- Etheramines are the main type of collectors in iron ore
flotation, but they need to be used alongside
polysaccharide depressant agents, to guarantee the
selectivity in separation of the iron minerals from
silicates.
- The protonated amines interact more strongly with
water, as expected.
- . Comparing the neutral species,
the amidoamine interacts better with water than
etheramine, but the order is reversed on protonation,
probably because it occurs at a primary amine site for
E and at a tertiary amine site for A.