Granted Patent
B2
US 12,630,769 · App. 17/595,510 · Granted May 19, 2026
Co-cracking pyoil with ethane
Inventors:
Daryl Bitting (Longview, TX); Kenny Randolph Parker (Afton, TN); Michael Gary Polasek (Longview, TX); David Eugene Slivensky (Tatum, TX); Xianchun Wu (Longview, TX); Jerome Leonard Stavinoha, Jr. (Longview, TX)
Assignee:
ExxonMobil Product Solutions Company
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Abstract
A hydrocarbon cracker stream is combined with recycle content pyrolysis oil to form a combined cracker stream and the combined cracker stream is cracked in a cracker furnace to provide an olefin-containing effluent. The r-pyoil can be fed to the cracker feed. More specifically cracking the cracker feedstock in said cracker furnace to provide an olefin-containing effluent stream; wherein the hydrocarbon composition is predominantly ethane.
Claims (11)
1 . A method of making one or more olefins, said method comprising:
(a) introducing into a steam cracker furnace, a cracker feedstock comprising a first cracker feed stream comprising a recycle content pyrolysis oil composition (r-pyoil) and a second cracker feed stream comprising a non-recycle predominantly C2 to C4 hydrocarbon composition, wherein said hydrocarbon composition is at least 80 weight percent ethane, based on the total weight of the hydrocarbon composition; wherein a combined weight of said cracker feedstock comprises at least 5% and not more than 30% r-pyoil by weight, and wherein said introducing comprises introducing said first cracker feed stream into a first coil of said steam cracker furnace and introducing said second cracker feed stream into a second coil of said steam cracker furnace; and
(b) separately cracking said first and second cracker feedstocks in said steam cracker furnace to provide an olefin-containing effluent stream.
2 . The method of claim 1 , further comprising, prior to said introducing, combining said r-pyoil with a predominantly C5 to C22 composition to form said first cracker feed stream.
3 . The method of claim 2 , wherein said introducing includes introducing said cracker feedstock comprising said r-pyoil into a cross-over zone in said steam cracker furnace.
4 . The method of claim 3 , wherein said introducing includes introducing said cracker feedstock comprising said r-pyoil into a convection section of said steam cracker furnace.
5 . The method of claim 4 , wherein said steam cracker furnace is a split furnace.
6 . The method of claim 5 , wherein said split furnace includes a single convection section and two or more radiant sections.
7 . The method of 6 , wherein at least 1 weight percent of said r-pyoil is obtained from the pyrolysis of recycled waste.
8 . The method of 7 , wherein not more than 95 weight percent of said r-pyoil is obtained from the pyrolysis of recycled waste.
9 . The method of claim 8 , wherein said recycled waste comprises waste plastics, waste textiles, waste carpet fibers, waste modified cellulose, waste biomass, post-industrial waste streams, intermediate industrial waste streams, or combinations thereof.
Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Oct 20, 2025
From: EASTMAN CHEMICAL COMPANY
To: EXXONMOBIL PRODUCT SOLUTIONS COMPANY
Reel/Frame 073142/0954 →
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Jan 25, 2022
From: BITTING, DARYL; PARKER, KENNY RANDOLPH; POLASEK, MICHAEL GARY; SLIVENSKY, DAVID EUGENE; WU, XIANCHUN; STAVINOHA, JEROME LEONARD, JR
To: EASTMAN CHEMICAL COMPANY
Reel/Frame 058752/0263 →
Continuity (1)
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