| 摘要 |
PURPOSE:To obtain an oxidation catalyst excellent in heat resistance even at high temp. by depositing one or more kinds of specified metal or its oxide on a carrier comprising a multiple oxide of zirconium and titanium. CONSTITUTION:The oxidation catalyst is prepared by depositing one or more kind of metal elements of groups Ib, Va, VIa, VIIa and VIII or their oxides on a carrier comprising a multiple oxide of zirconium and titanium. This carrier is obtained by adding a basic precipitant such as ammonia water or aq. soln. of sodium carbonate to an aq. soln. of zirconium compd. and titanium compd. to produce a precipitate, and then washing, drying and calcining the precipitate at specified temp. To deposit an oxide of the above-mentioned elements, the carrier is dipped in a nitrate soln. of respective elements before calcination. To deposit metal of the above-mentioned elements, the carrier is dipped in an aq. soln. of compd. of respective elements, and then reduced with hydrogen. The obtd. catalyst has excellent activity and durability against oxidization of gas such as hydrogen, carbon monoxide, and hydrocarbon gas. |
