| 摘要 |
PURPOSE: To remove CO and NOx in the exhaust gases of internal combustion engines by depositing Pt, Rh or the like on a porous carrier which is mainly composed of an inorg. refractory oxide and contains specific amts. of uranium oxide and oxides of Li, Na or the like, thereby forming a catalyst. CONSTITUTION: An aq. suspension of at least one inorg. refractory oxide, at least one salt or oxide of uranium and at least one salt or oxide of metal P is prepd. The support is coated with this aq. suspension to form a porous layer and thereafter the support is subjected to drying and a heat treatment at <=1000 deg.C, by which the porous carrier is obtd. This porous carrier is impregnated with a soln. of at least one precursor material of at least one metal A and is then subjected to drying and a heat treatment at <=1000 deg.C by which the exhaust gas treating catalyst deposited with the metal A is formed. The more specific examples of the metal P described above include Li, Na, K or the like and the more specific examples of the metal A described above include Pt, Rh, Pa, Ru, Ir or the like. |
