Device for purifying and/or decontaminating polyester

Details Device for purifying and/or decontaminating polyester Device for purifying and/or decontaminating polyester

2006-04-25

2006-04-25

Wilson, Gregory (Department: 3749)

Heating

Tumbler-type rotary - drum furnace

C432S118000, C034S201000, C521S048000

Reexamination Certificate

active

07033167

ABSTRACT:
The invention relates to an apparatus for cleaning and/or decontaminating polyester, in particular polyethylene terephthalate (PET). The apparatus has an at least partially heated rotary tubular furnace to be fed with a mixture of polyester and an alkaline material and is for carrying out a saponification reaction in the mixture. The invention is distinguished in that within the rotary tubular furnace a weir is disposed which at least partly closes the interior of the rotary tubular furnace.

REFERENCES:
patent: 4207062 (1980-06-01), Moench et al.
patent: 4290750 (1981-09-01), Whiteley
patent: 5083870 (1992-01-01), Sindelar et al.
patent: 5090134 (1992-02-01), Russemeyer et al.
patent: 5271163 (1993-12-01), Pikus et al.
patent: 5702247 (1997-12-01), Schoof
patent: 5716205 (1998-02-01), Tratz
patent: 6147129 (2000-11-01), Schwartz, Jr.
patent: 6685465 (2004-02-01), Marquardt
patent: 6745492 (2004-06-01), Haesendonckx

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