Abstract

A novel approach was designed to extract ruthenium (III) from malonic acid solution through solvent extraction
method. In this work, solvent extraction of ruthenium (III) from platinum group metals and base metals using high
molecular weight amine: 2‑dodecylaminopyridine as the extractant was investigated. The extraction behavior
of ruthenium (III) was investigated as function of various parameters: pH and organic acid concentration of
aqueous phase, concentration of extractant, phase ratio, phase contact time, diluents, and stripping from organic
phase. Under the optimal conditions, extraction efficiency of ruthenium (III) was 99.50%, which indicate that it
is an efficient extraction system for recovery of ruthenium.