Improved cleaning method safely removes pyrophoric iron sulfide

Philip A. Vella Carus Chemical Co. LaSalle, Ill. Refinery process and storage equipment often becomes contaminated with pyrophoric iron sulfide and various odor-causing materials. Traditionally, refiners have used mechanical or chemical methods for removing and controlling these contaminants. With increased focus on safety, efficiency, and the environment, however, new methods for equipment cleaning are required. Potassium permanganate, long used for industrial odor control, is finding increased acceptance among refiners for the destruction of pyrophoric iron sulfide and odorous compounds. A number of facilities have found that use of potassium permanganate res...

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