Reagent for removing mercury from industrial gases and method for reducing mercury emissions from industrial gas

摘要

A reagent for removing mercury from industrial gases containing elemental and oxidized mercury, said reagent having an iron sulfide solution prepared by the steps of: a) reacting a solution containing at least NaAlO and NaOH with a pickling solution containing FeCl, HCl and water to produce a reaction mixture containing Al, Fe, Cl, Na and HO; and b) adding NaHS to the reaction mixture of step a) to form an iron sulfide suspension containing at least FeS and aluminum hydroxide.