NITRIC ACID REDUCTION CATALYST COMPOSITION AND TREATMENT METHOD FOR NITRIC ACID SOLUTION USING THE SAME

摘要

PPROBLEM TO BE SOLVED: To obtain a nitric acid reduction catalyst composition that is applicable for a nitric acid solution with high concentration and is capable of efficiently reducing a nitric ion, a nitrous ion, and the like, and to provide a treatment method for the nitric acid solution using the composition. PSOLUTION: The nitric acid reduction catalyst composition comprises platinum and tin wherein the molar ratio of platinum to tin(Pt/Sn) is 4-1,000. The treatment method for the nitric acid solution comprises causing the nitric acid solution to contact with hydrogen gas under the presence of the nitric acid reduction catalyst composition. PCOPYRIGHT: (C)2006,JPO&NCIPI