NO.sub.x control in catalyst manufacture
AssigneeAmerican Cyanamid Company
InventorsMarvin Sherwood Goldstein, John Francis Lindsley, William Woodrow Allison, Charles Dan Price
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Abstract
An improved process for suppression of oxides of nitrogen arising from heat treatment of catalyst materials containing a source of such oxides is provided which comprises separately introducing the catalyst material and urea into the heating zone and then effecting heat treatment.
Claims10
A process for abating oxides of nitrogen which arise during heat treatment in the manufacture of catalysts containing a source of said oxides which process comprises introducing the catalyst material requiring heat treatment at a temperature of 300.degree. C. and higher in said manufacture into a suitable heat treatment zone, separately introducing an effective amount of urea into said heat treatment zone, and thereafter effecting heat treatment at a temperature of 300.degree. C. and higher whereby oxides of nitrogen arising from said catalyst material are abated by reaction with the separately introduced urea.
Dependencies are inferred from the claim text.