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 |
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.
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