PROCESS FOR PREPARING CHROMIUM SULPHATE FROM RESIDUAL SOLUTIONS CONTAINING HEXAVALENT CHROMIUM COMPOUNDS

摘要

A process for preparing chromium sulphate from residual solutions containing hexavalent chromium compounds, wherein, firstly, the hexavalent chromium from the residual solution to be treated is extracted and fixed, by known means notably by contacting the said solution either with an ion exchange resin or with a water-insoluble organic solvent, then the hexavalent chromium thus fixed by the resin or organic solvent is reextracted.