| 摘要 |
<p>The instant invention provides an olefin polymerization catalyst comprising chromium and titanium supported on silica. The catalyst is prepared with a low sodium ammonia-stabilized silica sol which has an average silicate particle size of from about 2 to about 6 nm. The catalyst produces polyethylene or a copolymer of ethylene and another olefin selected from the group consisting of the C3 to C8 mono 1-olefins, the polymer having a high melt index and a narrow molecular weight distribution.</p> |
