The First Effective Extractant For Trivalent Rhodium In Hydrochloric Acid Solution

摘要

The first effective extractant capable of the selective recovery of rhodium~(3+) from hydrochloric acid solution, iY-n-hexyl-bis-(N-methyl-N-n-octylethylamide)a mine (HBMOEAA), has been developed.rnRhodium~(3+) extraction from acidic chloride solution to an organic solvent is one of the most difficult reactions. To date, there has been no effective Rh extractant developed for industrial use, and in most of the separation and purification processes of platinum group metals (PGMs), rhodium remains in the raffinate. Since Rh is primarily used in automobile catalysts, along with palladium and platinum, and is the most expensive of the PGMs (e.g. Rh ≈ Pt × 5), recovery of Rh prior to the other PGMs seems to be desirable from an economic standpoint. Development of a useful Rh extractant is sorely needed.