Teijin Limited

Tetsuya Chikatsune

Minoru Suzuki

Hiroki Nagano

Minoru Nakashima

Takuo Nakao

Hiroshi Horiuchi

A major object of the invention is to provide such a method for extracting slurry that is not inhibited in extraction of slurry by a released and accumulated matter or a solid matter sedimented and accumulated at the bottom of the vessel. The invention relates to a method for extracting slurry by extracting slurry from an agitation vessel having a bottom face and a side wall and housing the slurry, characterized in that the slurry is extracted from an open end of a slurry extraction tube provided at the side wall of the agitation vessel. More preferably, a normal line direction of a surface of the open end is in a direction of an angle with respect to a downstream direction of a flow of the slurry caused by agitation of 0&#xb0; or more and less than 90&#xb0;.

Method for extracting slurry

A through process comprising depolymerization reaction of used PET bottles with EG, recovering DMT by ester interchange reaction with MeOH, obtaining terephthalic acid by hydrolysis of the recovered DMT, and manufacturing a PET polymer which can be used for manufacturing PET bottles again by using the terephthalic acid.

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Ehime, Japan

Tetsuya Chikatsune