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US 11,667,590 B2Granted
Ethylene oligomerization processes
AssigneeChevron Phillips Chemical Company LP
InventorsBrooke L. Small, Orson L. Sydora, Ronald D. Knudsen
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Abstract
Process for producing alpha olefins comprising contacting ethylene, a zirconium based catalyst system comprising, a hydrocarbylmetal compound, a chain transfer agent, and optionally an organic reaction medium. Chain transfer agents which can be utilized include a) hydrogen, b) a compound comprising a hydrogen silicon bond, a compound having a hydrogen sulfur bond, a compound having a hydrogen phosphorus bond, or c) a transition metal compound chain transfer agent.
Claims11
A process comprising:
- a) contacting
- i) ethylene,
- ii) a catalyst system comprising
- 1) a zirconium compound having the formula ZrX1mY1q, where each X1 independently is a halide, each Y1 independently is a hydrocarboxide, a dihydrocarbylazanide, a hydrocarbylcarboxylate, a hydrocarbylsulfonate, or a β-diketonate, m is in a range from 0 to 4, q is in a range from 0 to 4, and m+q is an integer from 2 to 4, and
- 2) a hydrocarbylmetal compound,
- iii) a chain transfer agent comprising a compound having a hydrogen silicon bond, a compound having a hydrogen sulfur bond, a compound having a hydrogen phosphorus bond, or any combination thereof, and
- iv) optionally, an organic reaction medium;
- and
- b) forming an oligomer product in a reaction zone;
- and
- wherein the oligomer product has a Schulz-Flory K value from 0.4 to 0.8.
8 more elements
Dependencies are inferred from the claim text.