Russia has studied the recovery of palladium from spent catalyst. The palladium is dissolved with acidic sodium chloride, and the initial concentration (mol∕l) of the obtained solution is: Pd: 0.0005 to 0.05; NaCl: 2.0 to 2.3; HCl: 0.5 to 2.0 or (0.02 to 0.05). The adsorption of palladium on the vinylpyridine ion exchangers AN-251M, ANKF-5 and VP-14K was investigated under batch conditions.

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