US 12,465,961 B2
Method for flushing reactor
Suprayudi S. Kadir, Al-Jubail (SA); Yasser Battal Mutairi-Al, Al-Jubail (SA); and Abdullah H. Zaydi-Al, Al-Jubail (SA)
Assigned to SABIC GLOBAL TECHNOLOGIES B.V., Bergen op Zoom (NL); and LINDE AG, Munich (DE)
Appl. No. 18/690,000
Filed by SABIC GLOBAL TECHNOLOGIES B.V., Bergen op Zoom (NL); and LINDE AG, Munich (DE)
PCT Filed Sep. 6, 2022, PCT No. PCT/EP2022/074712
§ 371(c)(1), (2) Date Mar. 7, 2024,
PCT Pub. No. WO2023/036767, PCT Pub. Date Mar. 16, 2023.
Claims priority of application No. 21195447 (EP), filed on Sep. 8, 2021.
Prior Publication US 2024/0383019 A1, Nov. 21, 2024
Int. Cl. B08B 9/08 (2006.01); B01J 10/00 (2006.01); B01J 19/00 (2006.01); B01J 19/06 (2006.01); B01J 19/24 (2006.01)
CPC B08B 9/08 (2013.01) [B01J 10/002 (2013.01); B01J 19/002 (2013.01); B01J 19/06 (2013.01); B01J 19/24 (2013.01); B01J 2219/00247 (2013.01); B08B 2209/08 (2013.01); B08B 2220/04 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A flushing process for removing polymer fouling from a reactor comprising a gas distributor proximal to a bottom of the reactor and an internal condenser proximal to a top of the reactor, the method comprising:
(a) removing polymer fouling by injecting a flushing solvent into the reactor at a location between the gas distributor and the internal condenser;
(b) withdrawing the flushing solvent from a reactor outlet proximal to the internal condenser to induce an upward movement of flushing solvent within the reactor, the withdrawn flushing solvent containing a first polymer content;
(c) continuing the (a) injecting and (b) withdrawing for a first flushing time period;
(d) after the first flushing time period is complete, injecting the flushing solvent into the reactor at the location between the gas distributor and the internal condenser;
(e) withdrawing the flushing solvent from a reactor outlet proximal to the gas distributor to induce a downward movement of flushing solvent within the reactor, the withdrawn flushing solvent containing a second polymer content; and
(f) continuing the (d) injecting and (e) withdrawing for a second flushing time period.