A PROCESS TO PRODUCE POLYOLEFINS WITH EXTRA LOW IMPURITY CONTENT

摘要

Provided is a process for producing polyolefins, comprising the steps of:
- polymerizing at least one olefin monomer;
- separating at least a part of the reaction mixture;
- dividing the separated reaction mixture into a polymer-lean fraction and a polymer-rich fraction;
and subjecting at least a part of the polymer-lean fraction to a purification step prior to recycling back to the polymerization of at least one olefin monomer. The obtained polyolefins particularly have a low content of volatile low molecular weight compounds, a low content of low-molecular weight polyolefin waxes and a low content of residues derived from the catalyst employed.