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US 12,344,695 B2Granted
Polymerization of ethylene in solution processes using a Ziegler-Natta catalyst and a hydrogenation catalyst
AssigneeDow Global Technologies LLC
InventorsLinfeng Chen, Andrew T. Heitsch, Jeffrey A. Sims, David M. Pearson, Kurt F. Hirsekorn
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Abstract
The catalyst system includes a heterogeneous procatalyst and a hydrogenation procatalyst. The heterogeneous procatalyst includes a titanium species, an aluminum species, and a magnesium chloride component. The hydrogenation procatalyst has the formula Cp2TiX2, In formula Cp2TiX2, each Cp is a cyclopentadienyl substituted with at least one R1, wherein R1 is (C1-C10)alkyl; and each X is independently a halogen atom.
Claims15
A catalyst system comprising:
- a heterogeneous procatalyst comprising a titanium species, an aluminum species, and a magnesium chloride component, wherein the heterogeneous procatalyst comprises heterogeneous procatalyst particles having an average particle size from 0.1 micron to 10 microns;
- and
- a hydrogenation procatalyst having the formula Cp2TiX2TiCp2 or Cp2TiXn
- 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) hydrocarbyl, (C1-C40) heterohydrocarbyl, or a halogen atom;
- and
- n is 1 or 2.
5 more elements
A polymerization process comprising:
- reacting (C2-C12) α-olefins in solution in the presence of a catalyst system, the catalyst system comprising:
- a heterogeneous procatalyst comprising a titanium species, an aluminum species, and a magnesium chloride component, wherein the heterogeneous procatalyst comprises heterogeneous procatalyst particles having an average particle size from 0.1 micron to 10 microns;
- and
- a hydrogenation procatalyst having the formula Cp2TiXnTiCp2 or Cp2TiXn
- 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) hydrocarbyl, (C1-C40) heterohydrocarbyl, or a halogen atom;
- and n is 1 or 2.
5 more elements
Dependencies are inferred from the claim text.