Extraction of Copper(II)From Sulphates Phase Using O,O Diphenyl [(E)-2-Cyano-1-Methylvinyl] Amido Phosphate and O,O Diphenyl [(E)-2-Cyano-1-Methylvinyl]Amido Thio Phosphate In Methane Dichloride. TUJ-BA 2019, 39 (3).