Rhenium(VII) extraction with Versatic hydrazides and N',N'-Dialkylhydrazides

Resumo

Rhenium(VII) and molybdenum(VI) extraction with kerosene solutions of α-branched tertiary carboxylic Versatic acids derivatives containing hydrazide C(O)NHNH2 and C(O)NHNCH₃)₂ fragments instead of carboxyl group has been studied. Optimal extraction conditions have been determined depending on H₂SO₄, HCl, and extractant concentrations and composition of extracted complexes has been established. The mechanism of extraction and back extraction of perrhenate ion with ammonia solutions has been suggested.