US 11,964,925 B2
Method for preparing oligomer
Kyung Seog Youk, Daejeon (KR); Jong Hun Song, Daejeon (KR); Min Ho Sun, Daejeon (KR); Hong Min Lee, Daejeon (KR); Hyun Seok Kim, Daejeon (KR); Moon Sub Hwang, Daejeon (KR); and Jeong Seok Lee, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/910,228
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Jan. 10, 2022, PCT No. PCT/KR2022/000346
§ 371(c)(1), (2) Date Sep. 8, 2022,
PCT Pub. No. WO2022/154398, PCT Pub. Date Jul. 21, 2022.
Claims priority of application No. 10-2021-0006655 (KR), filed on Jan. 18, 2021.
Prior Publication US 2023/0098226 A1, Mar. 30, 2023
Int. Cl. C07C 2/08 (2006.01); B01F 23/00 (2022.01); B01F 23/70 (2022.01); B01F 23/80 (2022.01); C07B 63/00 (2006.01); C07B 63/02 (2006.01); C07B 63/04 (2006.01); C07C 7/09 (2006.01); C07C 7/152 (2006.01); C07C 11/107 (2006.01)
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
OG exemplary drawing
 
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.