US 2024/0375321 A1 · REDUCING THE CARBON FOOTPRINT OF CHEMICAL RECYCLING FACILITIES

Abstract

Various processes and configuration are provided for a chemical recycling facility that can lower the carbon footprint and global warming potential of the facility. More particularly, we have discovered numerous ways for reducing the carbon footprint of the facility by: (i) recycling at least a portion of the residual heat energy from the pyrolysis effluent back upstream to the pyrolysis process and waste plastic liquification stage; (ii) recovering at least a portion of the carbon dioxide from at least a portion of the pyrolysis flue gas and/or the pyrolysis gas; (iii) feeding at least a portion of the pyrolysis gas at a cracker facility at a position downstream of a cracker furnace; (iv) using at least a portion of a demethanizer overhead stream as a fuel in a pyrolysis facility and/or a cracking facility; and (v) providing a chemical recycling facility that contains a pyrolysis facility co-located with a cracking facility. Thus, the global warming potential of the chemical recycling facility may be optimized and lowered due to the processes and configurations described herein.

Claims20

Dependent claims

A low Global Warming Potential (GWP) olefin production process, the process comprising:

(a) feeding a cracker feed to a cracker furnace of a cracker facility;
(b) producing CO2 and high value chemical products (HVCP) from the cracker facility at an initial GWP;
and
(c) reducing the initial GWP of the cracker facility to a reduced GWP by feeding at least a portion of a pyrolysis effluent to the cracker facility, wherein at least one of the following criteria is met—
(I) a pyrolysis gas is fed to the cracker facility downstream of the cracker furnace,
(II) at least a portion of a demethanizer overhead stream is used as a fuel in the cracker facility and/or a pyrolysis facility, or
(III) the pyrolysis effluent is produced by a waste plastic pyrolysis reaction in a pyrolysis facility that includes at least one or more of the following features—
(i) a heat transfer medium that derives and transfers heat energy from the pyrolysis effluent, a pyrolysis gas, and/or a pyrolysis oil to a process for making or processing a chemical or energy,
(ii) CO2 is recovered from a pyrolysis flue gas and/or the pyrolysis gas, or
(iii) the pyrolysis facility is co-located with the cracker facility.

7 more elements

Dependencies are inferred from the claim text.

Reducing the carbon footprint of chemical recycling facilities

Life of this patent

Reducing the carbon footprint of chemical recycling facilities

Life of this patent

Abstract

Claims20