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US 2022/0010218 A1Published application
High-temperature pyrolysis of plastics to monomers with high gas velocity
AssigneeUop LLC
InventorLev Davydov
Life of this patent
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Abstract
A high-temperature plastic pyrolysis process that can produce high yields of ethylene, propylene and other light olefins from waste plastics is disclosed. The plastic feed is pyrolyzed at a high temperature of about 600 to about 900° C. directly to monomers, such as ethylene and propylene. The pyrolysis reaction can be conducted in a fluidized manner which requires separation of heat carrier particles from pyrolysis gases.
Claims20
A process for converting plastics to monomers comprising:
- contacting a plastic feed stream with a stream of hot heat carrier particles in a reactor;
- heating the plastic feed stream to an elevated temperature of about 600 to about 1100° C.;
- lifting the plastic feed stream and the stream of hot heat carrier particles together;
- pyrolyzing the plastic in the plastic feed stream to gaseous products including monomers;
- separating the gaseous products from the heat carrier particles;
- and
- recovering said monomers from said gaseous products.
4 more elements
A process for converting plastics to monomers comprising:
- feeding a stream of hot heat carrier particles to a reactor;
- feeding a plastic feed stream to the reactor;
- lifting the hot heat carrier particles with a diluent gas into contact with the plastic feed stream;
- heating the plastic feed stream to an elevated temperature of about 600 to about 1100° C.;
- pyrolyzing the plastic in the plastic feed stream to gaseous products including monomers;
- separating the gaseous products from the heat carrier particles;
- and
- recovering said monomers from said gaseous products.
5 more elements
A process for converting plastics to monomers comprising:
- feeding a stream of hot heat carrier particles into a reactor through a particle inlet;
- contacting a plastic feed stream with a stream of hot heat carrier particles in a reactor;
- heating the plastic feed stream to an elevated temperature of about 600 to about 1100° C.;
- pyrolyzing the plastic in the plastic feed stream to gaseous products including monomers;
- moving the plastic feed stream and the stream of hot heat carrier particles together toward a reactor outlet;
- separating the gaseous products from the heat carrier particles;
- and
- recovering said monomers from said gaseous products.
5 more elements
Dependencies are inferred from the claim text.