
Recovery of rare earth elements adsorbed ...
Apr 01, 2012 · A twostage leaching process, where stage1 leach residue ( M) was repulped in fresh M NaCl and leached again under the same conditions ( M) improved the extraction to 60%. Furthermore, onestage leaching employing 1 M NaCl (L11 M) achieved about 63% extraction, which is less than the 73% achieved by the M Na 2 SO 4 system.