| 摘要 |
<p>A hydrocarbon conversion catalyst comprising an intermediate-pore-size zeolite which has an SiO2 to Al2O3 ratio of at least 20 by mole, contains one or more Group Ib metals and is substantially free of protons. The catalyst permits lower olefins mainly comprising ethylene and monocyclic aromatic hydrocarbons to be produced in high yields at a good balance therebetween, and is stable because of being reduced in the deterioration due to high-temperature steam.</p> |
