Methods and systems for processing mixed textile feedstock, isolating constituent molecules, and regenerating cellulosic and polyester fibers

This invention describes a way to recycle poly-cotton blended fabrics. It works by first using a chemical to dissolve the cotton part of the fabric, separating it out. The remaining polyester component is then treated, potentially using a specific catalyst, to isolate it for reuse.

Why it matters: Since 2021, the global push for textile circularity has accelerated, making chemical recycling methods more critical. Advances in reactor design or process intensification for systems using phase transfer catalysts, as specified in the claims, could now improve the economic viability of this complex separation.

Status: Not in forceListed as no longer active. The specific reason is not in the record we hold.
How hard to build: SpecializedChemical reagents, industrial separation equipment

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