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Title:
LACTIDE RECOVERY METHOD
Document Type and Number:
WIPO Patent Application WO/2017/130551
Kind Code:
A1
Abstract:
This lactide recovery method is characterized in that polylactic acid and a depolymerization catalyst are introduced into an extruder 1 leading to a vent chamber 3 kept under reduced pressure, the polylactic acid and the depolymerization catalyst are melted and kneaded in the extruder 1, the melted kneaded substance is supplied into the vent chamber 3, the polylactic acid is depolymerized in the vent chamber 3, and generated lactide is gasified and recovered from the vent chamber 3.

Inventors:
ITOU, Takurou (18-1, Higashi-Gotanda 2-chome, Shinagawa-k, Tokyo 27, 〒1418627, JP)
TANABE, Junko (Technical Headquarters, 1-70, Yako 1-chome, Tsurumi-ku, Yokohama-sh, Kanagawa 01, 〒2300001, JP)
TAGUCHI, Tomoaki (Technical Headquarters, 1-70, Yako 1-chome, Tsurumi-ku, Yokohama-sh, Kanagawa 01, 〒2300001, JP)
Application Number:
JP2016/084925
Publication Date:
August 03, 2017
Filing Date:
November 25, 2016
Export Citation:
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Assignee:
TOYO SEIKAN CO., LTD. (18-1, Higashi-Gotanda 2-chome Shinagawa-k, Tokyo 40, 〒1418640, JP)
International Classes:
C07D319/12; C08J11/16
Domestic Patent References:
WO2003091238A12003-11-06
Foreign References:
JP2010126491A2010-06-10
JPH07309863A1995-11-28
JP2012025855A2012-02-09
JP2010126490A2010-06-10
JP5051729B22012-10-17
Other References:
TADAMOTO SAKAI: "Reactive Processing Technology and the Roles of the Twin-Screw Extruder", PLASTICS AGE, vol. 56, no. 6, 2012, pages 56 - 71, ISSN: 0551-0503
TAKAYUKI TSUKEGI ET AL.: "Recovery of Lactide from Polylactic Acid/Polyethylene Blend with Extruder", JAPANESE JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY, vol. 63, no. 4, 2006, pages 241 - 247, XP055508105, ISSN: 0386-2186
OMURA MASAKI ET AL.: "Thermal Degradation Behavior of Poly(Lactic Acid) in a Blend with Polyethylene", INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, vol. 45, no. 9, 2006, pages 2949 - 2953, XP055508106
Attorney, Agent or Firm:
ONO, Hisazumi et al. (Nishi-Shimbashi Daiichi Hoki bldg, 5-2 Nishi-Shimbashi 3-chome, Minato-k, Tokyo 03, 〒1050003, JP)
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