US 11,939,282 B2
Method for decomposing phenolic by-product
Min Suk Kang, Daejeon (KR); Sang Beom Lee, Daejeon (KR); and Joon Ho Shin, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/413,790
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Aug. 11, 2020, PCT No. PCT/KR2020/010599
§ 371(c)(1), (2) Date Jun. 14, 2021,
PCT Pub. No. WO2021/054607, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 10-2019-0113587 (KR), filed on Sep. 16, 2019.
Prior Publication US 2022/0009868 A1, Jan. 13, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C07C 37/76 (2006.01); B01D 17/02 (2006.01); C07C 37/00 (2006.01); C07C 37/72 (2006.01)
CPC C07C 37/76 (2013.01) [B01D 17/02 (2013.01); C07C 37/005 (2013.01); C07C 37/72 (2013.01); B01D 2257/70 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of decomposing a phenolic by-product, the method comprising:
a step S10 of injecting and mixing a mixed by-product stream of bisphenol A by-product produced in a bisphenol A production process and a phenol by-product produced in a phenol production process, a decomposition apparatus side discharge stream, and a process water stream in a mixing apparatus;
a step S20 of injecting a mixing apparatus discharge stream discharged from the mixing apparatus into a phase separation apparatus and phase-separating the mixing apparatus discharge stream into an oil-phase stream and a liquid-phase aqueous solution stream;
a step S30 of feeding the oil-phase stream, which is phase-separated in the step S20 and discharged from the phase separation apparatus, to a decomposition apparatus to decompose the oil-phase stream; and
a step S40of circulating the decomposition apparatus side discharge stream obtained by the decomposition in the step S30 to the mixing apparatus in the step S10.