| 摘要 |
<p>The present invention relates to a process for improving the polymerization of ethylene and one or more optional co -monomer(s) in a polymerization loop reactor characterized in that said process comprises the step of controlling the hydrogen/monomer ratio along the path of the reactor by multiple, spatially separated, feeding of hydrogen along the path of the loop reactor. In particular, the invention provides a process for controlling , and preferably narrowing, the molecular weight distribution of the produced polymer particles. In another aspect, the invention relates to a polymerization loop reactor suitable for the polymerization process of ethylene and an optional olefin co -monomer, whe rein the molecular weight distribution of the produced ethylene polymer can be controlled.</p> |
