Patent ID: 8728971
Filing Date: 2014-05-20
Classification: B01J,C08F,G05D

Abstract:
1. A method for preparing a catalyst slurry and supplying said catalyst slurry to an ethylene polymerization loop reactor, said catalyst slurry comprising solid catalyst and a liquid hydrocarbon diluent, wherein said method comprises the steps of: (a) feeding concentrated catalyst slurry to a mixing vessel; (b) diluting said concentrated catalyst slurry in a suitable amount of said liquid hydrocarbon diluent in the mixing vessel thereby obtaining a diluted catalyst slurry having a concentration suitable for use in an ethylene polymerization reaction; wherein said mixing vessel is provided with at least one first pressure regulating unit, wherein said first pressure regulating unit comprises a pulsation dampener; and (c) transferring said diluted catalyst slurry from said mixing vessel to said ethylene polymerization loop reactor; characterized in that the method comprises the step of maintaining said mixing vessel essentially free of a gaseous phase by regulating pressure in said mixing vessel using said at least one first pressure regulating unit comprising the pulsation dampener.