Thermal pyoil to a gas fed cracker furnace

US12018220B2 · kind B2 · utility

Assignee

• Eastman Chemical Company · US

Inventors

• Daryl Bitting · Longview, US
• Kenny Randolph Parker · Afton, US
• Michael Gary Polasek · Longview, US
• David Eugene Slivensky · Center Point, US
• Xianchun Wu · Longview, US
• Jerome Leonard Stavinoha, Jr. · Longview, US

Key dates

• Filing date: May 22, 2020
• Grant date: Jun 25, 2024
• Expiry date: Sep 12, 2040

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P30/20
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A predominantly C2 to C4 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 a first coil while a second cracker feed with none of the r-pyoil or less of the r-pyoil is fed to a second coil, and both are cracked in a cracker furnace to form an olefin-containing effluent stream. Alternatively, the r-pyoil can be fed and distributed across multiple coils along with the non-recycle cracker feed. The furnace can be a gas fed furnace, or split cracker furnace. Further, a first cracker stream with r-pyoil in a first coil can have a lower total molar flow rate than a second cracker stream in a second coil in the same furnace.