Vanadium(V) extraction from sulfuric and hydrochloric acid solutions with hydrazides and N′,N′-dialkylhydrazides of Versatic acids

Hydrazides in the Processes of Extraction of Non-ferrous Metals from Ammonia Solutions

“…For example, N, N-alkylation of β-nitrogen atom of the functional group, which is one of the coordination centers, significantly changes the physicochemical and extraction properties of the initial hydrazides. Unlike hydrazides, N' ,N'-dimethylhydrazides were shown to be efficient both in extraction of copper (II) ions from ammonia solutions [2,3] and in extraction of acid complexes of vanadium (V), molybdenum (VI), rhenium (VII) [4,5].…”