FORFARANDE FOR FRAMSTELLNING AV EN JERNFRI KROM (III) FORENING

摘要

A chromium (III) compound containing very little iron compound contaminant is selectively precipitated from a mixture of iron and chromium compounds in aqueous acid solution by use of an elevated temperature and pressure, the acid aqueous solution of iron and chromium compounds containing at least 2 g/l of bivalent chromium.