Extraction Characteristics of Palladium in Aqueous Hydrochloric Acid with Tri-n-octylamine in Toluene Using A Vibro-Mixer

概要

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The extraction of palladium in aqueous hydrochloric acid solution by toluene solution of tri-n-octylammonium chloride salt was investigated using vibro-mixer type extractors under various operating conditions. In the extractors, 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 chloride salt of tri-n-octylamine in toluene and palladium chloride in aqueous 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 increased with the vibration frequencies and the feed velocities in the extractor. 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 components in less than one minute.
Japanese Association of Solvent Extraction,日本溶媒抽出学会の論文