Nonaqueous liquid-liquid extraction of manganese from ethylene glycol solution with trioctylphosphine oxide

The nonaqueous liquid-liquid extraction of manganese was investigated between the nonpolar solvents (cyclohexane or toluene) containing tri-n-octylphosphine oxide and ethylene glycol containing hydrogen chloride. Manganese was extracted in the two different hydrogen chloride concentration regions in the ethylene glycol phase. One of the manganese extractions was found at the higher hydrogen chloride concentration (above about 10-2 M), and the extracted from was MnCl2.2TOPO. Another was caused at the lower hydrogen chloride concentration (below about 10-3 M) and the extracted species was presumed to be manganese (deprotonated ethylene glycol)2.nTOPO complex. (author)