Degussa Gmbh

Daniel Ostgard

Francis P Daly

John Deuber

Chlorine dioxide is generated from an aqueous solution of sodium chlorite in the presence of a catalyst having a reduced rate of deactivation. The catalyst is preferably palladium, or palladium together with another platinum group metal (e.g., Pd&plus;Pt), or palladium together with a Group IB metal (e.g., Pd&plus;Au) deposited on a support modified by Group IA carbonate salt (e.g., K CO ) or a Group IIA carbonate salt (e.g., CaCO ) or a magnesium salt that can be converted to MgO or a support consisting of a Group IA carbonate salt or a Group IIA carbonate salt or a magnesium salt that can be converted to MgO.

Method for the synthesis of chlorine dioxide

Chlorine dioxide is generated from an aqueous solution of sodium chlorite in the presence of a catalyst having a reduced rate of deactivation. The catalyst is preferably palladium, or palladium together with another platinum group metal (e.g., Pd&plus;Pt), or palladium together with a Group IB metal (e.g., Pd&plus;Au) deposited on a support modified by Group IA carbonate salt (e.g., K,CO,) or a Group IIA carbonate salt (e.g., CaCO,) or a magnesium salt that can be converted to MgO or a support consisting of a Group IA carbonate salt or a Group IIA carbonate salt or a magnesium salt that can be converted to MgO.

Catalyst and method for the synthesis of chlorine dioxide, and method of making catalyst for the synthesis of chlorine dioxide

Chlorine dioxide is generated from an aqueous solution of sodium chlorite in the presence of a catalyst having a higher activity and a reduced rate of deactivation. The catalyst is preferably a Pd/Al.sub.2 O.sub.3 of palladium and another platinum group metal (e.g., Pd+Pt/Al.sub.2 O.sub.3) or palladium and a Group IB metal (e.g., Pd+Au/Al.sub.2 O.sub.3) catalyst containing La.sub.2 O.sub.3 and Nd.sub.2 O.sub.3.

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East Brunswick, NJ, United States of America

Daniel Ostgard