The solvent extraction of tin (II) from hydrochloric acid solutions with tri-n-octyl phosphine oxide (TOPO) in carbon tetrachloride has been studied. The extraction of the metal increases with increase in the concentration of the acid and that of the extractant. The species extracted is shown to be SnCl2·2TOPO. The influence of the metal concentration, temperature and the diluent on the extraction of tin (II) have been investigated.
Industrial micro-robots are now being applied to hazardous jobs or tedious jobs. These in-house micro-robots (MELFA, RM-501, Mitsubishi Electric Inc.) were used to make a collection system of waste scintillator solution on the experimental basis. Newly developed were hands, vial holders and a system soft ware, and satisfactory results have been obtained.