# US 12,600,911 B2 · Cracking a C4-C7 fraction of pyoil

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- Number: US 12,600,911 B2
- Document ID: US12600911B2
- Status: Granted
- Kind: B2
- Application number: 17/595,511
- Filed: 2020-05-22
- Published: 2022-07-21
- Granted: 2026-04-14
- Earliest claimed: 2019-05-24
- Assignees: ExxonMobil Product Solutions Company
- Applicants: ExxonMobil Product Solutions Company
- Inventors: Daryl Bitting; Kenny Randolph Parker; Michael Gary Polasek; David Eugene Slivensky; Xianchun Wu; Jerome Leonard Stavinoha, Jr.
- Web page: https://patentgrep.com/patent/US12600911B2

## CPC

- C10G 1/002: {in combination with oil conversion- or refining processes}
- C10G 9/00: Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G 1/10: from rubber or rubber waste
- C10G 9/20: Tube furnaces
- C10G 2300/1003: Waste materials
- C10G 2300/301: Boiling range
- C10G 2400/20: C2-C4 olefins
- C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES

## 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. Alternatively, the r-pyoil with a predominantly C4-C7 fraction can be fed to the cracker feed. The furnace can be a gas fed furnace, or split cracker furnace.

## Claims

### Claim 1

A steam cracker feedstock composition comprising (i) a recycle content pyrolysis oil composition (r-pyoil), wherein said r-pyoil has not been hydrotreated; wherein said r-pyoil has a C8+ content of at least 35 weight percent, based on the total weight of said r-pyoil; wherein said r-pyoil comprises not more than about 30 weight percent total aromatics, based on the total weight of said r-pyoil; wherein said r-pyoil is present in said steam cracker feedstock in an amount of not more than about 40 weight percent and/or at least about 1 weight percent; and wherein said r-pyoil comprises at least 35 weight percent of C4 to C7 hydrocarbons, based on the total weight of the r-pyoil, and (ii) a C2 to C4 non recycle hydrocarbon stream comprising ethane and/or propane, in an amount of at least 55 weight percent, based on the total weight of the steam cracker feedstock.

### Claim 2 (depends on 1)

The composition of claim 1, wherein at least 1 weight percent of said r-pyoil is obtained from the pyrolysis of recycled waste.

### Claim 3 (depends on 2)

The composition of claim 2, wherein not more than 95 weight percent of said r-pyoil is obtained from the pyrolysis of recycled waste.

### Claim 4 (depends on 3)

The composition of claim 3, wherein said recycled waste comprises recycled waste plastic.

### Claim 5 (depends on 4)

The composition of claim 4, 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.

### Claim 6 (depends on 1)

The composition of claim 1, wherein said C2-C4 non recycle hydrocarbon stream comprises at least 65 weight percent propane.

### Claim 7 (depends on 1)

The composition of claim 1, wherein said C2-C4 non recycle hydrocarbon stream comprises at least 65 weight percent ethane.

### Claim 8 (depends on 1)

The composition of claim 1, wherein said steam cracker feedstock has a total C15+ content of not more than 25 weight percent, based on the total weight of the stream.