Patent ID: 7847042

Claim:
A slurry process for producing polyethylene in two loop reactors comprising: polymerising ethylene alone or in combination with one or more alpha-olefinic comonomers in the presence of a supported metallocene catalyst, a polymerisation diluent. and a scavenger represented by the formula AlR x wherein each R is the same or different and is an alkyl group having from 3 to 8 carbon atoms, and x is 3, said scavenger being introduced in an amount of 5 to 40 ppm by weight based on the total amount of the diluent and reactants introduced to a first reactor; and additional ethylene, polymerisation diluent, and scavenger are introduced into the second reactor, the amount of the additional scavenger introduced into the second reactor being in the range of from 5 to 40 ppm by weight based on the additional diluent and additional reactants introduced into the second reactor.