US 11,691,931 B2
Chromium phosphinyl hydroisoindole amidine complexes for tetramerization of ethylene
Steven M. Bischof, Humble, TX (US); Orson L. Sydora, Sugar Land, TX (US); Daniel H. Ess, Provo, UT (US); Uriah J. Kilgore, Kennewick, WA (US); and Doo-Hyun Kwon, Royersford, PA (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 Aug. 18, 2022, as Appl. No. 17/890,364.
Application 17/890,364 is a continuation of application No. 17/521,508, filed on Nov. 8, 2021, granted, now 11,492,305.
Prior Publication US 2023/0146088 A1, May 11, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C07C 2/36 (2006.01); B01J 31/24 (2006.01); B01J 31/14 (2006.01)
CPC C07C 2/36 (2013.01) [B01J 31/143 (2013.01); B01J 31/2447 (2013.01); B01J 2231/20 (2013.01); C07C 2531/14 (2013.01); C07C 2531/24 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A process comprising:
a) contacting in a reaction zone
i) ethylene at a partial pressure in a range of from 5 psi to 2500 psi;
ii) a catalyst system comprising;
(a)(1) a bicyclic 2-[(phosphinyl)aminyl] cyclic imine chromium salt complex having Structure BPACICr I or Structure BPACICr II

OG Complex Work Unit Chemistry
or
(a)(2) a chromium salt and a bicyclic 2-[(phosphinyl)aminyl] cyclic imine having Structure BPACI I or Structure BPACI II

OG Complex Work Unit Chemistry
wherein
R21, R22, R23, and R24 independently are a hydrogen or a C1 to C30 organyl group,
L1, L2, and L3 independently are a C1 to C30 a hydrocarbylene group,
R4 and R5 independently are a C1 to C30 organyl group and
R4 and R5 optionally are combined to form L45 forming a ring or ring system including the phosphorus atom where L45 is a C1 to C30 organylene group,
CrXp is a chromium salt wherein X is a monoanion, and wherein p is an integer from 2 to 6, and
(b) an organoaluminum compound;
iii) optionally an organic reaction medium; and
b) forming an oligomer product in the reaction zone.