Process for preparing polyolefin
Polymerization of ethylene or ethylene/ olefin mixtures in the presence of improved titanium/vanadium catalyst
Process for the preparation of polymers of alpha-olefins at high temperatures Patent #: 4547473
ApplicationNo. 06/940080 filed on 12/10/1986
US Classes:526/116, At least one Group IVB metal atom (Ti, Zr, Hf) and at least one Group VB meta l (V, Nb, Ta)526/348.2, At least six carbon atoms526/352From ethylene only
ExaminersPrimary: Garvin, Patrick P.
Attorney, Agent or Firm
International ClassesC08F 10/02 (20060101)
C08F 10/00 (20060101)
Foreign Application Priority Data1986-01-11 NL
AbstractThe process for (co)polymerization comprises polymerizing ethylene and optionally minor amounts of 1-alkenes and/or dienes at a temperature greater than 180° C. in the presence of a catalyst system prepared by combining at least two components, A and B, which components comprise:A: one or more titanium compounds and one or more vanadium compounds, mixed with one or more organoaluminum compounds in such an amount that the atomic ratio of aluminum to the sum of titanium and vanadium is at least 3,B: one or more organoaluminum compounds,wherein one or both components A and b contain a chloride, and wherein the two components are fed, separately or in combination, direct to the reaction vessel in such an amount that the atomic ratio of the chlorine from components A and/or B to the sum of titanium and vanadium of component A is at least 6.