4-(5-nonyl) pyridine extraction of platinum from different aqueous solutions

The partition of tracer-level (<10-7mole/1) platinum between various 4-(5-nonyl)-pyridine phases and aqueous nitric, hydrochloric, and sulphuric acid phases has been studied radiometrically as a function of the amine and acid concentrations. The effects of salting-out agents and some anions on the extraction of the metal are reported. The extraction data are compared with that of gold and conditions are established for the separation of daughter 199Au from neutron irradiated platinum. The distribution coefficients of various metal ions are given for the 4-(5-nonyl)-pyridine 10M HCl system and their factors for separation from platinum estimated. (author)