A process for recycling a polyester waste material comprising polyurethane and / or polyamide impurities

TW202637729APending Publication Date: 2026-09-16CURE TECH BV
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Patent Information

Application Number
TW114145236
Authority / Receiving Office
TW · TW
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-11-21
Filing Date
2025-11-20
Publication Date
2026-09-16

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Abstract

The invention pertains to a process for recycling a polyester waste material, the polyester waste material comprising polyurethane (PUR) and / or polyamide (PA) impurities, the process comprising the following steps: - dispersing the polyester waste material in liquid 2-(2-ethoxyethoxy) ethanol (DGME), to dissolve any PUR impurities in the DGME and thereafter separating a stream of liquid DGME with the dissolved PUR impurities from the polyester waste material; - dispersing the polyester waste material in liquid mono ethylene glycol (MEG), to dissolve any PA impurities in the MEG and thereafter separating a stream of liquid MEG with the dissolved PA impurities from the polyester waste material; and after the steps of separating the said streams of liquid DGME and liquid MEG from the polyester waste material, subjecting this polyester waste material to a step wherein the polyester is depolymerised into an oligomeric ester by alcoholysis.
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