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US 10,703,838 B2Granted
Mixed catalyst systems with four metallocenes on a single support
AssigneeExxonMobil Chemical Patents Inc.
InventorsMatthew W. Holtcamp, David F. Sanders, Matthew S. Bedoya, Ching-Tai Lue
Life of this patent
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Abstract
The present disclosure provides a supported catalyst system and process for use thereof. In particular, the catalyst system includes four different catalysts, a support material and an activator. The catalyst system may be used for preparing polyolefins, such as polyethylene.
Claims59
A catalyst system comprising:
- at least two different catalysts represented by formula (A):
- wherein:
- M is Hf or Zr,
- each R1, R2, and R4 is independently hydrogen, alkoxide or a C1 to C40 substituted or unsubstituted hydrocarbyl group,
- R3 is independently hydrogen, alkoxide or a C1 to C40 substituted or unsubstituted hydrocarbyl group or is CH2—SiR′3 or CH2—CR′3, and each R′ is independently a C1 to C20 substituted or unsubstituted hydrocarbyl,
- each R7, R8, R9 and R10 is independently hydrogen, alkoxide, a C1 to C40 substituted or unsubstituted hydrocarbyl group, —CH2—SiR′3, or —CH2—CR′3, and each R′ is independently a C1 to C20 substituted or unsubstituted hydrocarbyl, wherein at least one of R7, R8, R9 and R10 is —CH2—SiR′3 or —CH2—CR′3,
- T1 is a bridging group, and
- each X is independently a univalent anionic ligand, or two Xs are joined and bound to the metal atom to form a metallocyclic ring, or two Xs are joined to form a chelating ligand, a diene ligand, or an alkylidene ligand;
- at least two different catalysts represented by formula (B):
- T2yCpmM1Xq (B)
- wherein:
- each Cp is independently a cyclopentadienyl, indenyl or fluorenyl group which is optionally independently substituted or unsubstituted,
- M1 is zirconium or hafnium,
- T2 is a bridging group,
- y is 0 or 1, indicating the absence or presence of T,
- X is a halide, a hydride, an alkyl group, an alkenyl group or an arylalkyl group,
- m=2 or 3, q=0, 1, 2, or 3, the sum of m+q is equal to the oxidation state of the transition metal, 2, 3, or 4, and
- each Cp and X is bound to M1;
- a support material;
- and
- an activator.
18 more elements
A catalyst system comprising:
- at least two different catalysts represented by formula (A):
- wherein:
- M is Hf or Zr,
- each R2, and R4 is independently hydrogen, alkoxide or a C1 to C40 substituted or unsubstituted hydrocarbyl group,
- R3 is independently hydrogen, alkoxide or a C1 to C40 substituted or unsubstituted hydrocarbyl group or is —CH2—SiR′3 or —CH2—CR′3, and each R′ is independently a C1 to C20 substituted or unsubstituted hydrocarbyl,
- each R7, R8, R9 and R10 is independently hydrogen, alkoxide, a C1 to C40 substituted or unsubstituted hydrocarbyl group, —CH2—SiR′3, or —CH2—CR′3, and each R′ is independently a C1 to C20 substituted or unsubstituted hydrocarbyl, wherein at least one of R7, R8, R9 and R10 is —CH2—SiR′3 or —CH2—CR′3,
- T1 is a bridging group, and
- each X is independently a univalent anionic ligand, or two Xs are joined and bound to the metal atom to form a metallocyclic ring, or two Xs are joined to form a chelating ligand, a diene ligand, or an alkylidene ligand;
- at least one catalyst represented by formula (C) and at least one catalyst represented by formula (D):
- CpmM1Xq (C)
- T3CpmM2Xq (D)
- wherein:
- each Cp is independently a cyclopentadienyl, indenyl or fluorenyl group which optionally is independently substituted or unsubstituted,
- M1 is zirconium or hafnium,
- M2 is zirconium or hafnium,
- T3 is a bridging group;
- X is a halide, a hydride, an alkyl group, an alkenyl group or an arylalkyl group,
- m=2 or 3, q=0, 1, 2, or 3, the sum of m+q is equal to the oxidation state of the transition metal, 2, 3, or 4,
- each Cp and X is bound to M1 or M2;
- a support material;
- and
- an activator.
19 more elements
Dependencies are inferred from the claim text.