CPC C07C 2/08 (2013.01) [C07C 7/09 (2013.01); C07C 7/152 (2013.01); C07C 11/107 (2013.01); B01F 23/00 (2022.01); B01F 23/70 (2022.01); B01F 23/706 (2022.01); B01F 23/80 (2022.01); B01F 23/807 (2022.01); C07B 63/00 (2013.01); C07B 63/02 (2013.01); C07B 63/04 (2013.01)] | 14 Claims |
10. A method for preparing an oligomer, the method comprising:
supplying a monomer stream comprising a monomer and a solvent stream comprising a solvent to a reactor to perform an oligomerization reaction to prepare a reaction product;
supplying a discharge stream from the reactor to a separation device, wherein the discharge stream comprises the reaction product, and supplying a lower discharge stream from the separation device to a settling tank;
adding an organic flocculant to the settling tank to settle and remove a polymer from the lower discharge stream, wherein in the settling tank, the lower discharge stream from which the polymer is removed is separated into an upper layer liquid including a solvent and a lower layer liquid including the oligomer, and
supplying an upper layer liquid stream comprising the solvent to a solvent separation column and a lower layer liquid stream comprising the oligomer to a high boiling point separation column; and
removing a high boiling point material from a lower portion in the high boiling point separation column and supplying an upper discharge stream including the oligomer to the solvent separation column.
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