Kerr-mcgee Corporation

Kerr-mcgee Coal Corporation

Paul R Graham

Olen L Riggs, Jr

Roger A Baldwin

Virgil J Barczak

A process for reducing the sulfur oxide content of flue gases produced by combustion of sulfur-containing coal containing cations of alkali metals, alkaline earth metals or both, in ion exchangeable form. Flue gases containing sulfur oxides are recycled to contact coal awaiting combustion. Sulfur oxides are absorbed on the coal during the contact step, which is conducted in the presence of water. Sulfur oxides react with alkali and alkaline earth metal cations, and are oxidized to form sulfate reaction products. When the treated coal is burned, these sulfate reaction products are retained in the coal ash.

Process for treating coal to reduce sulfur content in flue gases

A process and apparatus for oxidizing vanadium and uranium in wet process phosphoric acid to a higher valence state for extraction by subsequent contact with complex organic extractants. The wet process phosphoric acid is oxidized in an electrolytic cell operated at a controlled potential via use of a reference electrode. The cell comprises a tank having at least one high surface area anode and at least one high surface area cathode separated by an ion exchange membrane.

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Edmond, OK, United States of America

Paul R Graham