Influence of Diluent Type on Palladium ...

In this paper, extraction of palladium from chloride media by DC18-Crown-6 (dicyclohexyl-18-crown-6 ether) as effective extractant and MIPS and chloroform as diluent has been investigated. The extraction parameters including pH, carrier and feed concentration, and contact time were studied in detail. The results indicated that the efficiency of palladium extraction by DC18-Crown-6 is not very high. Potassium chloride (KCl) was added to the feed solution to form a stable complex with the crown ether. In the presence of KCl, the extraction efficiency could be improved. Generally, the results revealed that chloroform is more suitable than MIPS for this extraction system. At the same conditions, palladium could be separated about 65% with chloroform after 10 minutes, while only 22% was extracted with MIPS after 180 minutes.