Optimized cracker conditions to accept pyrolysis oil

US12215283B2 · 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 Sllivensky · Center Point, US
• Xianchun Wu · Longview, US
• Jerome Leonard Stavinoha, Jr. · Longview, US

Key dates

• Filing date: May 22, 2020
• Grant date: Feb 4, 2025
• Expiry date: Nov 16, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G2400/20
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Recycle content pyoil is cracked in a cracker furnace to make olefins and the coil outlet temperature of the r-pyoil fed coils can be lowered by adding r-pyoil to the cracker feedstock, or alternatively, the coil outlet temperature of the r-pyoil fed tubes can rise if the mass flow rates of the combined cracker stream containing r-pyoil are kept the same or lowered. Further, increasing the hydrocarbon mass flow rate by addition of r-pyoil can be achieved to also increase the output of ethylene and propylene in the cracker effluent. The cracker furnace can accept ethane and/or propane feedstocks in vapor form along with a liquid and/or vapor feed of r-pyoil.