Olefin polymerization catalyst system and process for polymerization of olefins
Process for polymerizing ethylene in a gaseous phase
Supported arene complex olefin catalysis
Measuring device for thread and a method of adjusting the length of a travelling thread
Multi-step gas-phase polymerization of olefins
Preparing ethylene polymers using Ziegler catalyst comprising cyclodienyl compound of zirconium
Continuous process for the preparation of polyolefins having widely distributed molecular weights
Process for multi-step gaseous phase polymerization of olefins
ApplicationNo. 997421 filed on 12/28/1992
US Classes:502/107, Including heating to higher temperature502/104, Preparing catalyst or precursor502/113, Containing two or more different Component B metals502/115, Magnesium containing502/117, Component B metal is other than titanium or vanadium502/120, Elemental oxygen or nonmetallic inorganic oxygen-containing material, other than water526/114, Contains non-transition elemental metal, hydride thereof, or carbon to non transition metal atom bond526/116, At least one Group IVB metal atom (Ti, Zr, Hf) and at least one Group VB meta l (V, Nb, Ta)526/160, Transition metal bonded to carbon atom526/943POLYMERIZATION WITH METALLOCENE CATALYSTS
ExaminersPrimary: Garvin, Patrick P.
Attorney, Agent or Firm
Foreign Patent References
International ClassC08F 004/646
AbstractA support containing methylalumoxane and derivatives thereof is described which is formed by an incipient impregnation technique. The most preferred support is silica. Incipient impregnation in accordance with the invention provides a supported alumoxane, methylalumoxane, which substantially eliminates the problem of fluid bed reactor fouling when methylalumoxane is introduced into the reactor during its operation.In accordance with the invention, the process comprises providing methylalumoxane activated metallocene compound in particulate form as catalysts in fluid bed gas phase.