A description is given of the fundamentals and experience gained in practice for the employment of ion‐exchange resins of the Wofatit type for water cycling in electroplating, the nickel recovery from electroplating wastes, the recovery of ZnCl2 in the vulcanized fibre production as well as the regeneration of phosphoric‐acid pickling solutions. Wofatit AD 41 is sufficiently chromate‐resistant, peroxo compounds have to be removed in any case prior to the anion exchange. In circulation systems, countercurrent cation exchangers are not absolutely necessary, in the case of high quality demands on the deionate they are suitable, however. For the nickel recovery with the aid of Wofatit CA 20 the double‐regeneration (elution and activation) is necessary. Special experience is still necessary concerning the enrichment especially of organic disturbing substances. For the phosphoric‐acid regeneration the size and surface of the pickling bath, the capacity of the regeneration plant and the specific increase of the iron concentration in the pickling bath have to be exactly coordinated with each other. In the economic evaluation, amortization periods of one to three years result for the metal recovery.