Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...
Patent
1993-07-28
1994-08-30
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Process of treating scrap or waste product containing solid...
521 405, 521 485, 524 34, 528487, C08J 1104, C08J 1128
Patent
active
053428544
ABSTRACT:
A process is described for recycling polyester and cotton blend fabrics by separating the polyester from the cotton fabric. The novel process to recycle the polyester/cotton blend fabrics includes the steps of (a) providing a polyester and cotton blend fabric; (b) charging said blend into a sulfone solvent; (c) dissolving the polyester in the sulfone solvent; (d) separating the dissolved polyester and sulfone solvent solution from the cotton fabric; (e) filtering the cotton to obtain isolated, cotton fabric.
REFERENCES:
patent: 3801273 (1974-04-01), Mays
patent: 3937671 (1976-02-01), Gruntfest et al.
patent: 3937675 (1976-02-01), Gruntfest et al.
patent: 4345039 (1982-08-01), Cowan et al.
"Polyester Fibers from Polyester/Cotton Blends", Organic and Polymer Waste Reclaiming Encyclopedia, pp. 328-329.
"Cotton Fibers from Cotton/Synthetic Fiber Blends", Organic and Polymer Waste Reclaiming Encyclopedia, pp. 97-98.
"Dimethyl Terephthalate from Polyethylene Terephthalate Waste", Organic and Polymer Waste Reclaiming Encyclopedia, pp. 117-122.
Asinovsky Olga
Hoechst Celanese Corporation
McCann Philip P.
Michl Paul R.
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