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Title:
METHOD FOR PRODUCING GLYCOLIDE
Document Type and Number:
WIPO Patent Application WO/2011/089802
Kind Code:
A1
Abstract:
Disclosed is a method for producing glycolide, which comprises: a step wherein a mixture containing a glycolic acid oligomer, a high boiling point polar organic solvent having a boiling point of 230-450˚C and a tin compound is heated, at atmospheric pressure or reduced pressure, to a temperature at which the glycolic acid oligomer is depolymerized, thereby dissolving the glycolic acid oligomer in the high boiling point polar organic solvent; a step wherein the solution in which the glycolic acid oligomer is dissolved is heated, at atmospheric pressure or reduced pressure, to a temperature at which the glycolic acid oligomer is depolymerized, thereby depolymerizing the glycolic acid oligomer in the solution and producing glycolide; and a step wherein the high boiling point polar organic solvent and the thus-produced glycolide are co-distilled out of the depolymerization reaction system.

Inventors:
SUZUKI Shigeru (3-3-2 Nihonbashi-Hamacho, Chuo-k, Tokyo 52, 〒1038552, JP)
鈴木 茂 (〒52 東京都中央区日本橋浜町三丁目3番2号 株式会社クレハ内 Tokyo, 〒1038552, JP)
YAMANE Kazuyuki (3-3-2 Nihonbashi-Hamacho, Chuo-k, Tokyo 52, 〒1038552, JP)
山根 和行 (〒52 東京都中央区日本橋浜町三丁目3番2号 株式会社クレハ内 Tokyo, 〒1038552, JP)
Application Number:
JP2010/072671
Publication Date:
July 28, 2011
Filing Date:
December 16, 2010
Export Citation:
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Assignee:
KUREHA CORPORATION (3-3-2, Nihonbashi-Hamacho Chuo-k, Tokyo 52, 〒1038552, JP)
株式会社クレハ (〒52 東京都中央区日本橋浜町三丁目3番2号 Tokyo, 〒1038552, JP)
SUZUKI Shigeru (3-3-2 Nihonbashi-Hamacho, Chuo-k, Tokyo 52, 〒1038552, JP)
鈴木 茂 (〒52 東京都中央区日本橋浜町三丁目3番2号 株式会社クレハ内 Tokyo, 〒1038552, JP)
YAMANE Kazuyuki (3-3-2 Nihonbashi-Hamacho, Chuo-k, Tokyo 52, 〒1038552, JP)
International Classes:
C07D319/12; B01J23/14; C07B61/00
Domestic Patent References:
Foreign References:
JP2002128777A
JP2004523596A
JPH09328481A
CN101054371A
Attorney, Agent or Firm:
CENTCREST IP ATTORNEYS (Kimpodo Bldg. 9th Floor, 2-8-21 Kyobashi, Chuo-k, Tokyo 31, 〒1040031, JP)
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Claims: