Process for recycling polyester/cotton blends

Details Process for recycling polyester/cotton blends Process for recycling polyester/cotton blends

1992-03-12

1993-08-17

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Process of treating scrap or waste product containing solid...

524 41, 524 34, 811551, 81157, 81161, 8121, C08J 1104, C08J 1124, D06M 1138, D06M 1300

Patent

active

052369595

ABSTRACT:
A process for recycling polyester/cotton blends by reducing the polyester to a lower dialkyl ester of terephthalic acid and reducing the cotton to cellulose acetate. The novel process to recycle the polyester/cotton blends includes the steps of (a) providing a blend of polyester and cotton fibers; (b) subjecting the polyester/cotton blend to a first alcoholysis in a bath containing an alcohol and an effective catalyst at a suitable temperature until the polyester is depolymerized to a lower molecular weight polyester oligomer; (c) remove the cotton fibers from the alcoholic solution of oligomers and process the recovered cotton fibers by pulping and acetylyzing processes to recover the cellulose acetate; and (d) alcoholyze the low molecular weight polyester oligomers to produce the lower dialkyl ester of terephthalic acid.

REFERENCES:
patent: 2729618 (1956-01-01), Muller
patent: 3222299 (1965-12-01), MacDowell
patent: 3257335 (1966-06-01), Whitfield, Jr. et al.
patent: 3354026 (1967-11-01), Illingworth
patent: 3488298 (1970-01-01), Barkey et al.
patent: 3488298 (1970-01-01), Barkey et al.
patent: 3703488 (1972-11-01), Morton
patent: 3793373 (1974-02-01), Grasemann et al.
patent: 3801273 (1974-04-01), Mays
patent: 3830759 (1974-08-01), Barkey
patent: 3843321 (1974-10-01), Drelich
patent: 3907868 (1975-09-01), Currie et al.
patent: 3937671 (1976-02-01), Gruntfest et al.
patent: 3937675 (1976-02-01), Gruntfest et al.
patent: 3960485 (1976-06-01), Fantl et al.
patent: 4003880 (1977-01-01), Sidebotham et al.
patent: 4092105 (1978-05-01), Sullins
patent: 4092481 (1978-05-01), Bunger
patent: 4118187 (1978-10-01), Sidebotham et al.
patent: 4163713 (1979-08-01), Keogh
patent: 4163860 (1979-08-01), Delattre et al.
patent: 4345039 (1982-08-01), Cowan et al.
patent: 4543364 (1985-09-01), Nankee et al.
patent: 4609680 (1986-09-01), Fujita et al.
"Recovery of Fibers and Chemicals from Apparel Cutting Room Waste" by Jerry Goldbaugh of Georgia Tech Research Institute, Jul. 24, 1981--7 pages.

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