PROCESSES AND DEVICES FOR REMOVING RUTHENIUM AS RuO4 FROM RUTHENATE-CONTAINING SOLUTIONS BY DISTILLATION

摘要

In processes for removing ruthenium by distilling RuO₄ from ruthenate-containing solutions with these steps ofthe treatment of the ruthenate-containing solution with an oxidising agent,distilling off of the RuO₄ formed,absorbing the RuO₄ from step II in hydrochloric acid,the oxidising agent is recycled into step I following step III.;The processes can be carried out in reactor modules withA a reactor with a stirrer, gas inlet and gas outlet,B at least one scrubber connected in series downstream with the gas outlet via a line,C one or several gas absorbers connected in series downstream with the at least one scrubber via lines,E at least one line from the optionally last absorber for recycling into the gas inlet of the reactoror into a further moduleor into a facility for off-gas treatment.