	US 12,215,283 B2
	Optimized cracker conditions to accept pyrolysis oil
Daryl Bitting, Longview, TX (US); Kenny Randolph Parker, Afton, TN (US); Michael Gary Polasek, Longview, TX (US); David Eugene Sllivensky, Tatum, TX (US); Xianchun Wu, Longview, TX (US); and Jerome Leonard Stavinoha, Jr., Longview, TX (US)
Assigned to Eastman Chemical Company, Kingsport, TN (US)
Appl. No. 17/594,370
Filed by Eastman Chemical Company, Kingsport, TN (US)
PCT Filed May 22, 2020, PCT No. PCT/US2020/034153 § 371(c)(1), (2) Date Oct. 13, 2021, PCT Pub. No. WO2020/242917, PCT Pub. Date Dec. 3, 2020.
Claims priority of provisional application 62/852,361, filed on May 24, 2019.
Claims priority of provisional application 62/852,364, filed on May 24, 2019.
Prior Publication US 2022/0177788 A1, Jun. 9, 2022
Int. Cl. C10G 51/02 (2006.01); C10G 1/00 (2006.01); C10G 1/10 (2006.01)

CPC C10G 51/023 (2013.01) [C10G 1/002 (2013.01); C10G 1/10 (2013.01); C10G 2300/1003 (2013.01); C10G 2300/301 (2013.01); C10G 2400/20 (2013.01)]

2 Claims

1. A method for making one or more olefins, said method comprising:

(a) cracking a cracker stream in a cracking furnace to provide a first olefin-containing effluent exiting the cracking furnace at a first coil outlet temperature (COT1);

(b) subsequent to step (a), adding a stream comprising a recycle content pyrolysis oil composition (r-pyoil) to said cracker stream to form a combined cracker stream; and

(c) cracking said combined cracker stream in said cracking unit to provide a second olefin-containing effluent exiting the cracking furnace at a second coil outlet temperature (COT2),

wherein, when said r-pyoil is heavier than said cracker stream, COT2 is equal to or less than COT1,

wherein, when said r-pyoil is lighter than said cracker stream, COT2 is greater than or equal to COT1.