Extraction characteristics of palladium in aqueous hydrochloric acid with tri-n-octylamine in toluene using a vibro-mixer

The extraction of palladium in aqueous hydrochloric acid solution by toluen e solution of tri-n-octylammonium chloride salt was investigated using vibr o-mixer type extractors under various operating conditions. In the extracto rs, continuously fed heterogeneous solutions were mixed by the vibration of spiral circular plates installed in the extractor. The overall extraction rates were interpreted by (1,1) orders of reaction rate of; the ammonium ch loride salt of tri-n-octylamine in toluene and palladium chloride in aqueou s solution for a residence time of 24 sec and 0 to 300 strokes per minute ( spm) of the vibration frequencies. The overall reaction rate constants incr eased with the vibration frequencies and the feed velocities in the extract or. Equilibrium in the system investigated was attained at over 400 spm of the vibration for 24 sec of residence time. The mixed effluent phases from the extractor were separated easily into their aqueous and organic componen ts in less than one minute.