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Title:
METHOD FOR SEPARATION/REMOVAL OF FOREIGN MATERIAL FROM POLYESTER FIBER WASTE
Document Type and Number:
WIPO Patent Application WO/2008/102896
Kind Code:
A1
Abstract:
Disclosed is a method for collecting a useful component from a polyester fiber waste mainly comprising a polyalkylene terephthalate, specifically for separating/removing a foreign material (in the most cases, cotton) from a polyester fiber waste. Specifically disclosed is a method for separating/removing a foreign material other than a polyalkylene terephthalate from a polyester fiber waste which mainly comprises the polyalkylene terephthalate and contains the foreign material. The method comprises the steps of charging the polyester fiber waste into a depolymerization tank to cause a part or the whole of the polyester fiber to be depolymerized with an alkylene glycol, thereby producing a depolymerization solution; and feeding the depolymerization solution to a foreign material separation/removal apparatus having a specific characteristic properties continuously or intermitetntly.

Inventors:
MUKAI KOUJI (JP)
NAKASHIMA MINORU (JP)
Application Number:
JP2008/053120
Publication Date:
August 28, 2008
Filing Date:
February 19, 2008
Export Citation:
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Assignee:
TEIJIN FIBERS LTD (JP)
MUKAI KOUJI (JP)
NAKASHIMA MINORU (JP)
International Classes:
C08J11/24; B01D29/11; B01D29/62; B01D29/94
Foreign References:
JP2005330444A2005-12-02
JP2004217871A2004-08-05
JP2003128626A2003-05-08
JP2001151709A2001-06-05
JPH0165610U1989-04-26
JPS6229531U1987-02-23
JP2004277639A2004-10-07
JP2004217871A2004-08-05
Other References:
See also references of EP 2123705A4
Attorney, Agent or Firm:
MIHARA, Hideko (2-1 Kasumigaseki 3-chom, Chiyoda-ku Tokyo 13, JP)
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