Bimodal polyethylene are widely used to produce high performance pipes

such as PE100 and PE100RC

and shows increasing importance in polyethylene market because of their excellent mechanical and processing properties. Nowadays

commercialized bimodal polyethylene is synthesized primarily in tandem-reactor process

which needs high energy consumption and capital investment in equipment

beside

the technology is under monopoly of foreign companies. By contrast

bimodal polyethylene synthesis using bimetallic catalyst in single reactor process is becoming research hotspot in domestic and abroad

because this process is more environment friendly and needs much lower cost in equipment investment and operation. Recent work in this group on Cr-based bimetallic catalysts is reviewed. Development on other bimetallic catalysts is also introduced and future trend is prospected.