| 摘要 |
<p>A catalyst is prepd. by (a) forming a soln. contg. a cpd. of a metal of Gps. IVA, IB, VIB, VIIB or VIII and a carbothiolic, carbothionic, carbodithiolic or mercapto-carboxylic acid, (b) ageing the soln. at 25-100 degrees C (50-100 degrees C) for between 5 minutes and 24 hours (5-15 minutes), and (c) mixing a refractory oxide carrier with the aged soln. The catalyst is used to treat exhaust gas from internal combustion engines. The activity of the catalyst is improved. The carrier is esp. Al2O3 in partic. gamma or eta-Al2O3 with surface area 100-500 m2/g. The catalytic metla is pref. Pt, and H2PtCl6 is pref. used in the soln.</p> |
