| 摘要 |
<p>PURPOSE:To increase the durability of the title catalyst for purifying exhaust gas by coating a catalyst composition consisting of a refractory inorg. oxide carrying Pt and/or a refractory inorg. oxide carrying Rh on a honeycomb carrier to obtain the catalyst. CONSTITUTION:The refractory inorg. oxide (a) coated with 5-30wt.% Pt is prepared. Besides, the refractory inorg. oxide (b) coated with 1-20wt.% Rh is prepared. The (a) and/or the (b) are ground by a mill, etc., to 0.5-20mum means particle diameter to prepare a slurry contg. the powder. The slurry is then wash-coated on a monolithic honeycomb carrier, dried, and then calcined, as required, to produce the catalyst for purifying exhaust gas. Alumina, silica, titania, zirconia, etc., can be used as the refractory inorg. oxide.</p> |
