US 11,912,658 B2
Method for separating olefin oligomerization products (variants)
Oleg Leonidovich Arkatov, Tomsk Tomskaya obl. (RU); Maxim Vladimirovich Lipskikh, Tomsk Tomskaya obl. (RU); Evgeniy Anatolievich Popov, Tomsk Tomskaya obl. (RU); and Airat Faritovich Khusainov, Tomsk Tomskaya obl. (RU)
Assigned to Public Joint Stock Company “Sibur Holding”, Tobolsk (RU)
Appl. No. 17/432,816
Filed by PUBLIC JOINT STOCK COMPANY “SIBUR HOLDING”, Tobolsk (RU)
PCT Filed Feb. 22, 2019, PCT No. PCT/RU2019/000112
§ 371(c)(1), (2) Date Aug. 20, 2021,
PCT Pub. No. WO2020/171730, PCT Pub. Date Aug. 27, 2020.
Prior Publication US 2022/0127210 A1, Apr. 28, 2022
Int. Cl. C07C 7/04 (2006.01); B01D 1/22 (2006.01); B01D 3/14 (2006.01); B01J 31/14 (2006.01); C07C 7/00 (2006.01); C07C 11/107 (2006.01)
CPC C07C 7/005 (2013.01) [B01D 1/222 (2013.01); B01D 3/148 (2013.01); B01J 31/143 (2013.01); C07C 7/04 (2013.01); C07C 11/107 (2013.01); B01J 2231/20 (2013.01); B01J 2531/62 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method of separating olefin oligomerization products, the method comprising the following sequence of steps:
a) discharging a reaction mass from an oligomerization reactor;
b) contacting the reaction mass with a catalyst system deactivating agent;
c) isolating a fraction comprising an initial olefin from the reaction mass to form a stream of the fraction comprising the initial olefin and an oligomerization reaction product stream;
c)* directing a first part of the oligomerization reaction product stream from step c) into a separation column; and directing a second part of the oligomerization reaction product stream from step c) to an evaporator in step d);
d)* separating the first part of the oligomerization reaction product stream from step c) in the separation column into a light fraction, a fraction of a target α-olefin, and a heavy fraction of oligomers, followed by directing the heavy fraction of oligomers to the evaporator in(step d);
d) separating, in the evaporator, the heavy fraction of oligomers from step d)* and the second part of the oligomerization reaction product stream into a fraction predominantly comprising the target α-olefin, and a fraction comprising a by-product polymer and catalyst system residues;
e) directing the fraction predominantly comprising the target α-olefin obtained in step d) and the first part of the oligomerization reaction product stream from step c) into the separation column, for the separating in step d)* into the light fraction, the fraction of the target α-olefin, and the heavy fraction of oligomers.