US 11,667,590 B2
Ethylene oligomerization processes
Brooke L. Small, Kingwood, TX (US); Orson L. Sydora, Houston, TX (US); and Ronald D. Knudsen, Saratoga Springs, UT (US)
Assigned to Chevron Phillips Chemical Company, LP, The Woodlands, TX (US)
Filed by Chevron Phillips Chemical Company LP, The Woodlands, TX (US)
Filed on May 26, 2021, as Appl. No. 17/330,523.
Prior Publication US 2022/0380274 A1, Dec. 1, 2022
Int. Cl. C07C 2/30 (2006.01); B01J 31/12 (2006.01); B01J 31/14 (2006.01)
CPC C07C 2/30 (2013.01) [B01J 31/12 (2013.01); B01J 31/128 (2013.01); B01J 31/143 (2013.01); C07C 2531/14 (2013.01); C07C 2531/22 (2013.01)] 11 Claims
OG exemplary drawing
 
1. 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.