Process for preparing polyolefins

摘要

The present invention relates to a process of preparing a polyolefin in a loop reactor by introducing anti-fouling agent in by-pass pipes. Also, the invention relates to the use of anti-fouling agent to prevent blockage by feeding the anti-fouling agent into the by-pass pipes of the loop reactor.

主权项

1. Process of preparing a polyolefin in a loop reactor, said loop reactor comprising interconnected pipes defining a reactor path, and wherein said loop reactor further comprises one or more by-pass pipes connecting two points of the same loop, wherein said polyolefin is prepared in the presence of anti-fouling agent, characterized in that a composition comprising the anti-fouling agent and a diluent is introduced into the reactor by feeding into one or more of said by-pass pipes, via a diluent feed line directly connected to said one or more by-pass pipes, and wherein said composition comprises less than 10% by weight of monomer, more preferably less than 5% by weight, most preferably less than 1% by weight of monomer.