Method of recovering constituents from polyester and cellulosic textile waste
AssigneeTextile Research Institute
InventorsIrving Gruntfest, Rudolph Turner, Ludwig Rebenfeld
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Abstract
Textile wastes composed of blended polyester and cellulose fibers are subjected to the action of glacial acetic acid and acetic anhydride in the presence of a catalyst under conditions which serve to convert the cellulose component of the waste to cellulose acetate which is separated from the unreacted polyester component in the form of a solution adapted to be used in the manufacture of cellulose derivatives whereas the polyester is recovered in a form which may be garnetted to obtain a staple fiber for reuse.
Claims6
A method of producing useful products from textile wastes containing blended polyester and cellulose fibers which comprises treating such wastes with an aqueous solution of glacial acetic acid and acetic anhydride under conditions which serve to acetylate the cellulose while leaving the polyester substantially unaffected and separating the unreacted polyester fiber from the cellulose acetate composition thereby produced.
Dependencies are inferred from the claim text.