Liquid–liquid extraction of palladium(II) in diantipyrylalkane– benzoic acid–HCl–H2O stratifying systems

The study of palladium(ii) extraction in stratifying systems containing diantipyrylmethane, butyldiantipyrylmethane, hexyldiantipyryl- methane, benzoic acid, hydrochloric acid and water has revealed that Pd²⁺ ions form the complex compound [DAA·H]₂(PdCl₄) (DAA is diantipyrylalkane) which is extracted by an anion exchange mechanism.