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US 2022/0306772 A1Published application
Polymerization of ethylene in solution processes using a ziegler-natta catalyst and a hydrogenation procatalyst
AssigneeDow Global Technologies LLC
InventorsLinfeng Chen, David M. Pearson
Life of this patent
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Abstract
Processes of polymerizing olefin monomers and catalyst systems. The catalyst systems include a non-hydrogen-generating post-metallocene procatalyst; a co-catalyst; and a hydrogenation procatalyst having the formula Cp2TiXnTiCp2 or Cp2TiXn, in which each Cp is cyclopentadienyl substituted with at least one (C1-C10)alkyl; each X is independently monoanionic or neutral, wherein each X is independently (C1-C40)hydrocarbon, (C1-C40)heterohydrocarbon, (C1-C40)hydrocarbyl, (C1-C40)heterohydrocarbyl, or a halogen atom; and n is 1 or 2.
Claims13
A catalyst system comprising:
- a non-hydrogen-generating post-metallocene procatalyst;
- a co-catalyst;
- and
- a hydrogenation procatalyst having the formula Cp2TiX2TiCp2 or Cp2TiXn where:
- each Cp is cyclopentadienyl optionally substituted with at least one (C1-C10)alkyl;
- each X is independently monoanionic or neutral, wherein each X is independently (C1-C40)hydrocarbon, (C1-C40)heterohydrocarbon, (C1-C40)hydrocarbyl, (C1-C40)heterohydrocarbyl, or a halogen atom;
- and
- n is 1 or2.
5 more elements
A catalyst system comprising:
- a non-hydrogen-generating post-metallocene procatalyst;
- and
- Cp2TiX2 treated with an aluminum alkyl species, where:
- each Cp is cyclopentadienyl substituted with at least one (C1-C10)alkyl;
- each X is independently monoanionic or neutral, wherein each X is independently (C1-C40)hydrocarbon, (C1-C40)heterohydrocarbon, (C1-C40)hydrocarbon anion, (C1-C40)heterohydrocarbon anion, or a halogen atom;
- and
- n is 1 or2.
4 more elements
Dependencies are inferred from the claim text.