MODIFICATION OF EXTRACTION ABILITIES OF N,N,N'N'-TETRAALKYL-3,5-PYRIDINEDICARBOXAMIDE BY ITS ASSOCIATION WITH ALCOHOL

ABSTRACT

The extraction of copper with N,N,N'N'-tetrahexyl-3,5-pyridinedicarboxamide in the presence of the decanol and the co-association of the amide with alcohol were studied. Alcohol associates with the amide forming hydrogen bonds mainly with the oxygens of the carbonyl group without blocking the chemically active pyridine nitrogen. Hydration occurs in the same way. The effect of the alcohol on copper extraction is relatively small and weaker than the effect of chloride concentration.