Device for purifying and/or decontaminating polyester

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

2006-09-12

2006-09-12

Wilson, Gregory (Department: 3749)

Heating

Tumbler-type rotary - drum furnace

Having structure agitating or controlling the motion of the...

C432S110000, C034S201000

Reexamination Certificate

active

07104788

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, and an orifice is formed in the shell of the rotary tubular furnace adjacent the weir for separating undersize grain from the PET.

REFERENCES:
patent: 4207062 (1980-06-01), Moench et al.
patent: 4439141 (1984-03-01), Deckebach
patent: 5083870 (1992-01-01), Sindelar et al.
patent: 2056389 (1972-05-01), None
patent: 1457472 (1966-09-01), None

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