| 摘要 |
<p>A process for cracking hydrocarbon containing feed streams, which have an initial boiling point of at least 400 DEG F and contain at least about 5 ppmw vanadium, is carried out in the presence of a catalyst composition comprising a physical mixture of (a) zeolite embedded in an inorganic refractory matrix material and (b) at least one oxide of Be, Mg, Ca, Sr, Ba or La, preferably MgO, on a silica containing support material.</p> |
