US 12,343,774 B2
Reactor cleaning method
Kyung Seog Youk, Daejeon (KR); Jong Hun Song, Daejeon (KR); Hong Min Lee, Daejeon (KR); Moon Sub Hwang, Daejeon (KR); and Jeong Seok Lee, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 18/028,142
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Jul. 25, 2022, PCT No. PCT/KR2022/010915
§ 371(c)(1), (2) Date Mar. 23, 2023,
PCT Pub. No. WO2023/058865, PCT Pub. Date Apr. 13, 2023.
Claims priority of application No. 10-2021-0133998 (KR), filed on Oct. 8, 2021; and application No. 10-2022-0081252 (KR), filed on Jul. 1, 2022.
Prior Publication US 2024/0293852 A1, Sep. 5, 2024
Int. Cl. B08B 9/08 (2006.01); B01J 19/24 (2006.01); B08B 9/093 (2006.01)
CPC B08B 9/08 (2013.01) [B01J 19/24 (2013.01); B08B 9/0813 (2013.01); B08B 9/093 (2013.01); B08B 2209/08 (2013.01); C11D 2111/20 (2024.01)] 12 Claims
OG exemplary drawing
 
1. A method for cleaning a reactor, the method comprising:
pressurizing a washing solvent container to 5 kg/cm2 (gauge) to 40 kg/cm2 (gauge) using a pressurized gas;
supplying a washing solvent stream including a washing solvent from the washing solvent container to the reactor simultaneously through a first washing circulation line connected to a lower end of the reactor and a second washing circulation line connected to a side portion of the reactor;
filling the reactor with the washing solvent; and
circulating the washing solvent stream between the washing solvent container and the reactor while maintaining a temperature of the reactor at 115° C. to 200° C.