Oxide-coated carriers and preparation and use thereof

摘要

A novel carrier which is stable and effective over long cycle times (6x106 prints), has an iron oxide coating of the formula (FeO)x.Fe2O3 where x=0.1-1 and is obtained by treating steel cores (or balls) with defined small amounts of sulfuric acid of defined concentration, partial oxidation of the cores thus treated and drying at 60 DEG -150 DEG C. at