US 11,685,701 B2
Chromium bicyclic phosphinyl 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 Sep. 27, 2022, as Appl. No. 17/953,557.
Application 17/953,557 is a continuation of application No. 17/521,505, filed on Nov. 8, 2021, granted, now 11,505,513.
Prior Publication US 2023/0150899 A1, May 18, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C07C 2/36 (2006.01); B01J 31/14 (2006.01); C07F 11/00 (2006.01); B01J 31/24 (2006.01)
CPC C07C 2/36 (2013.01) [B01J 31/143 (2013.01); B01J 31/2447 (2013.01); C07F 11/00 (2013.01); B01J 2231/20 (2013.01); C07C 2531/14 (2013.01); C07C 2531/24 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A catalyst system comprising:
i) (a) an N2-phosphinyl bicyclic amidine chromium salt complex having Structure NPBACr I or Structure NPBACr II

OG Complex Work Unit Chemistry
or
(b) a chromium salt and an N2-phosphinyl bicyclic amidine having Structure NPBA I or Structure NPBA II

OG Complex Work Unit Chemistry
wherein
R11, R12, R13, R14, R15, R16, R17, and R18 independently are a hydrogen or a C1 to C30 organyl group,
L1 and L2 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 and wherein the compound comprises an additional cyclic structure,
CrXp is a chromium salt wherein X is a monoanion, and wherein p is an integer from 2 to 6; and
ii) an organoaluminum compound.