METHOD FOR CLEANING A VESSEL

摘要

A method for cleaning a vessel by dissolving iron oxide present in the vessel with a complexing acid includes introducing a dissolved salt acting as an alkaline reducer and being formed of an acid acting as a complexing agent, volatile alkalizing agents and a reducing agent, into the vessel at temperatures substantially between 150.degree.C and 250.degree.C and just below the decomposition temperature of the complexing agent for the purpose of complexing the iron. The iron oxide is subsequently removed in the form of a dissolved iron complex by emptying the vessel.