Industrial Application of BCE Catalyst in Slurry Process for Polyethylene with Bimodal Relative Molecular Mass Distribution

Industrial application of BCE catalyst in polymerization of ethylene by slurry process to produce polyethylene with bimodal relative molecular mass distribution was introduced and compared with application of an imported catalyst.The physical and mechanical properties of polyethylene obtained by using BCE catalyst and imported catalyst were investigated.BCE is more sensitive in hydrogen responsibility and better in copolymerization behavior.Polyethylene obtained from BCE catalyst is narrower in particle size distribution and higher in bulk density(0.34-0.37 g/cm~3)than that obtained from imported catalyst(0.27-0.34 g/cm~3).The content of fine powder(particle diameter less than 75μm)in polyethylene with BCE is about 14.9%(mass fraction),far less than that in polyethylene with imported catalyst,which is 38.4%(mass fraction).Oligomer content with BCE catalyst is also less than that with the imported.