PROCESS FOR THE EXTRACTION OF METAL VALUES USING HYDROCYCLIC COMPOUNDS CONTAINING TWO NITROGEN HETERO-ATOMS AND METAL EXTRACTANTS

摘要

ABSTRACTProcess for the Extraction of Metal Values Using HydrocyclicCompounds Containing Two Nitrogen Hetero-Atoms and NovelMetal ExtractantsMetal values are extracted from aqueous solutions of metalsalts containing halide or pseudo halide ions by pyrimidine, pyrazineor pyridazine derivitives bearing the substituent -(C=O.X)n where Xis the group -OR1 or -NR2R3 and n is 1, 2 or 3. R1 is a hydrocarbylgroup containing from 1 to 36 carbon atoms and R2 and R2 togethercontain from 1 to 36 carbon atoms. The molecule as a whole containsfrom 5 to 36 alkyl carbon atoms and may carry furter optionalsubstituents. The process is especially useful for the recovery ofmetals from leach solutions derived from sulphur-containg ores.