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Hydrogen as a retaining ion for rare-earth separation by ion exchange with EDTA and DCTA
Naphthenic acid solvent extraction of rare-earth sulphates
Extraction of euxenite metal values by fusion with ammonium sulfate or ammonium bisulfate
Investigation of oxidation systems for improving gold recovery from carbonaceous materials
Extraction behavior of cerium-group lanthanides in a primary amine-chelating agent system
Recovery of cerium and lanthanum by ozonation of lanthanide solutions
Amino acids as retaining agents for separation of rare-earth elements on ion-exchange resin
Electrolytic oxidation of carbonaceous ores for improving gold recovery