It is also established that
the highest recoveries of quartz are obtained for C4E1,
C4E3 and C6E2 ethers. The best selectivity of flotation of
the carbonaceous copper shale and quartz mixture is
observed for C4E2 and C2E2 ethers, which do not enhance
quartz flotation. The obtained results can be used, for
instance, to develop a technology for separation of
organic carbon present in carbonaceous shale.