US 11,859,025 B2
Oligomerization catalyst system activation and related ethylene oligomerization processes and reaction systems
Steven M. Bischof, Humble, TX (US); James L. Hillier, Kingwood, TX (US); Uriah J. Kilgore, Kingwood, TX (US); Steve R. Hutchison, Spring, TX (US); Bruce E. Kreischer, Humble, TX (US); and Orson L. Sydora, Houston, TX (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. 7, 2021, as Appl. No. 17/467,505.
Application 17/467,505 is a continuation of application No. 16/929,204, filed on Jul. 15, 2020, granted, now 11,267,909.
Prior Publication US 2022/0025081 A1, Jan. 27, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C08F 4/69 (2006.01); C08F 2/00 (2006.01); C08F 10/02 (2006.01); C07C 2/36 (2006.01); B01J 31/14 (2006.01); B01J 31/18 (2006.01); B01J 31/24 (2006.01)
CPC C08F 10/02 (2013.01) [C07C 2/36 (2013.01); B01J 31/143 (2013.01); B01J 31/189 (2013.01); B01J 31/2438 (2013.01); B01J 2231/20 (2013.01); B01J 2531/62 (2013.01); C07C 2531/14 (2013.01); C07C 2531/24 (2013.01); C08F 4/69 (2013.01); C08F 4/69068 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A process comprising:
a) forming a first mixture in an activation vessel, the first mixture comprising:
1) ethylene,
2) a catalyst system comprising i) a heteroatomic ligand chromium compound complex and an organoaluminum compound, or ii) a heteroatomic ligand, a chromium compound, and an organoaluminum compound,
3) optionally, a first organic reaction medium, and
4) optionally, hydrogen;
b) maintaining the first mixture in the activation vessel for an average residence time;
c) introducing into a reaction zone:
i) ethylene,
ii) the first mixture from step b),
iii) a second organic reaction medium, and
iv) optionally, hydrogen; and
d) forming an oligomer product in the reaction zone;
wherein the average residence time of the first mixture in the activation vessel is in a range from 10 sec up to a period of time sufficient for a conversion of ethylene in the activation vessel to equal 5 mol % of a total ethylene utilized in step a) and step c).