Waste plastic density separation
US12157251B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Feb 10, 2021 |
| Grant date | Dec 3, 2024 |
| Priority date | — |
| Expiry date | Feb 10, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Methods and systems for separating mixed plastic waste are provided herein. The methods generally comprise separating the mixed plastic waste into a PET-enriched stream and one or more PET-depleted streams. The separating may be accomplished using the combinations of two or more density separation stages. Exemplary density separation stages include sink-float separators and centrifugal force separators. The PET-enriched and PET-depleted streams may be recovered and/or directed to downstream chemical recycling processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.