US 12,116,330 B2
Heat exchange configurations for oligomerization of olefins
Bruce E. Kreischer, Kingwood, 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 Aug. 15, 2023, as Appl. No. 18/234,234.
Application 18/234,234 is a continuation of application No. 18/107,159, filed on Feb. 8, 2023, granted, now 11,773,036.
Application 18/107,159 is a continuation of application No. 17/871,471, filed on Jul. 22, 2022, granted, now 11,629,107, issued on Apr. 18, 2023.
Claims priority of provisional application 63/224,665, filed on Jul. 22, 2021.
Prior Publication US 2023/0382824 A1, Nov. 30, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C07C 2/32 (2006.01); B01J 19/00 (2006.01)
CPC C07C 2/32 (2013.01) [B01J 19/0006 (2013.01); B01J 19/0013 (2013.01); B01J 2219/0006 (2013.01); B01J 2219/00065 (2013.01); C07C 2531/22 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A process comprising:
a) introducing at least 1) ethylene, 2) a catalyst system or catalyst system components comprising i) a heteroatomic ligand transition metal compound complex and an organoaluminum compound or ii) a heteroatomic ligand, a transition metal compound, and an organoaluminum compound, 3) optionally, an organic reaction medium, and 4) optionally, hydrogen into a reaction mixture within a reaction zone;
b) forming an oligomer product in the reaction zone; and
c) controlling a pressure in a heat exchange system to provide a reaction mixture temperature within the reaction zone, the heat exchange system comprising a first heat exchanger providing indirect contact between at least a portion of the reaction mixture and a first heat exchange medium, the first heat exchanger comprising a first heat exchange surface having
i) a first heat exchange surface first side in contact with the at least a portion of the reaction mixture, and
ii) a first heat exchange surface second side in contact with the first heat exchange medium;
where a pressure on the first heat exchange surface second side is less than 1 atmosphere (101.3 kPa); and
where the first heat exchange medium has a boiling point at 1 atmosphere (101.3 kPa) greater than an average reaction mixture temperature on the first heat exchange surface first side and a boiling point at the pressure on the first heat exchange surface second side less than the average reaction mixture temperature on the first heat exchange surface first side, and
where a temperature difference between the average reaction mixture temperature on the first heat exchange surface first side and a first heat exchange medium temperature on the first heat exchange surface second side is less than 20° C.