Patent ID: 8703883
Filing Date: 2014-04-22
Classification: B01J,C08F,Y10S

Abstract:
1. A method of operating a polymerization reactor system, the method comprising: (i) reducing an average particle size of a first catalyst system component to produce a reduced catalyst system component having a reduced average particle size, wherein the first catalyst system component comprises chromium impregnated onto silica, chromium impregnated onto silica-titania, chromium cogelled with silica, chromium cogelled with silica-titania, or any combination thereof; (ii) introducing a transition metal-based catalyst system comprising the reduced catalyst system component and an olefin monomer into a polymerization reactor within the polymerization reactor system; (iii) contacting the transition metal-based catalyst system comprising the reduced catalyst system component with the olefin monomer under polymerization conditions to produce an olefin polymer; (iv) monitoring a process variable in the polymerization reactor system and/or a property of the olefin polymer, and (v) when the process variable and/or the property has/have reached a predetermined level, adjusting the reduced average particle size.