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US 12,371,546 B2Granted
Feedstock purification of polyester waste for recycling processes
AssigneeTaclov, LLC
InventorsGregory Breyta, Robert David Allen
Life of this patent
Estimating the term…
Abstract
Pre-treating a waste polyester material with dichloromethane (DCM) produce purified polyester for reuse. The purified polyester can be recycled via any chemical or mechanical recycling process. Where the waste polyester material includes non-polyester contaminants, the DCM-treated polyester material produces a slurry that includes the DCM, a solid component that includes a polyester monomer product for reuse, and a waste liquid component where the non-polyester contaminants can be filtered from the top of the liquid component.
Claims16
A method comprising:
- purifying a waste material comprising a polyester by treating the waste material with dichloromethane (DCM) to form a DCM-treated waste product;
- recovering purified polyester from the DCM-treated waste product;
- and
- recycling the purified polyester by a chemical recycling process.
1 more element
A method comprising:
- purifying a waste material comprising a polyester by treating the waste material with dichloromethane (DCM) to form a DCM-treated waste product;
- recovering purified polyester from the DCM-treated waste product;
- and
- recycling the purified polyester by a mechanical recycling process.
1 more element
Dependencies are inferred from the claim text.