	US 11,993,564 B2
	Method of decomposing phenolic by-products
Min Suk Kang, Daejeon (KR); Sang Beom Lee, Daejeon (KR); Ji Hyang Son, Daejeon (KR); and Chi Hyun Jang, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/629,319
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Jun. 15, 2021, PCT No. PCT/KR2021/007491 § 371(c)(1), (2) Date Jan. 21, 2022, PCT Pub. No. WO2022/014876, PCT Pub. Date Jan. 20, 2022.
Claims priority of application No. 10-2020-0088698 (KR), filed on Jul. 17, 2020.
Prior Publication US 2022/0259125 A1, Aug. 18, 2022
Int. Cl. C07C 37/86 (2006.01); C07C 4/24 (2006.01); C07C 7/10 (2006.01); C07C 37/52 (2006.01); C07C 37/68 (2006.01); C07C 37/72 (2006.01); C07C 45/80 (2006.01); C07C 45/82 (2006.01)

CPC C07C 37/86 (2013.01) [C07C 4/24 (2013.01); C07C 7/10 (2013.01); C07C 37/52 (2013.01); C07C 37/68 (2013.01); C07C 37/72 (2013.01); C07C 45/80 (2013.01); C07C 45/82 (2013.01)]

10 Claims

1. A method of decomposing phenolic by-products, the method comprising:

supplying a phenolic by-product stream having an amount of process water of 2 wt % or less to a decomposition device to perform thermal decomposition;

separating an upper discharge stream including effective components and a lower discharge stream including materials having a high boiling point in the decomposition device;

supplying the lower discharge stream from the decomposition device, a side discharge stream from the decomposition device, and a process water stream to a mixing device and mixing these streams; and

supplying a discharge stream from the mixing device to a layer separation device to separate the discharge stream from the mixing device into an oil phase and an aqueous phase,

wherein a portion of an aqueous stream discharged from the layer separation device is supplied to the mixing device, and a residual stream is discharged as waste water including salts.