Process for the recovery of rhodium from aqueous solutions containing rhodium complexes
AssigneeHoechst Aktiengesellschaft
InventorsGerhard Diekhaus, Harald Kappesser
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Abstract
A process for the recovery of rhodium from aqueous solutions of complexes thereof wherein the solutions are treated with oxygen in the presence of a water soluble salt of a carboxylic acid and, in a second stage, further treated with a hypochlorite, whereby oil soluble rhodium compounds are formed which can readily be separated from the aqueous solution.
Claims45
A process for the recovery of rhodium from aqueous solutions containing rhodium complexes comprising, in a first stage, treating said solutions at 80.degree. to 140.degree. C. with oxygen and/or an oxygen-containing gas in the presence of a water soluble salt of a carboxylic acid, which acid has 7 to 22 carbon atoms, to form a mixture and, in a second stage, treating said mixture with a hypochlorite at 50.degree. to 140.degree. C. to form a composition containing rhodium compounds.
Dependencies are inferred from the claim text.