| 摘要 |
<p>A process for converting an oxygenate feed to high purity olefins such as polymer-grade propylene (C30/C3= « 0.05) at a temperature of about 450 °C (842 °F), using a molecular sieve catalyst having a high preselected Si/Al2 ratio (such as ZSM-5, ZSM-48) or a preselected Si/Fe2 ratio (such as FeZSM-5), or SAPO-34.</p> |
