Title:
APPARATUS AND METHOD FOR POLYMER SYNTHESIS
Document Type and Number:
Japanese Patent JP2009114353
Kind Code:
A
Abstract:
To provide a means for producing lactide efficiently, in the production of poly (lactic acid) wherein a lactic acid oligomer is depolymerized, and the resultant lactide is subjected to ring-opening polymerization.
An apparatus for producing the lactide continuously or intermittently is disclosed, which includes a depolymerization unit 11 for depolymerizing the lactic acid oligomer, a catalyst regeneration unit 27 for depolymerizing a residue in the depolymerization unit to reduce a molecular weight of the lactic acid oligomer contained in the residue, and a distillation column 29 for condensing the lactide produced in the gas phase in the depolymerization unit.
Inventors:
KAMIKAWA MASAYUKI
MATSUO TOSHIAKI
OKAMOTO SHIGEYASU
OKA KENICHIRO
YATSUGI TAKASHI
FUJII YASUHIRO
KAWAMOTO TATSUJI
MATSUO TOSHIAKI
OKAMOTO SHIGEYASU
OKA KENICHIRO
YATSUGI TAKASHI
FUJII YASUHIRO
KAWAMOTO TATSUJI
Application Number:
JP2007289664A
Publication Date:
May 28, 2009
Filing Date:
November 07, 2007
Export Citation:
Assignee:
HITACHI PLANT TECHNOLOGIES LTD
TOYOTA MOTOR CORP
TOYOTA MOTOR CORP
International Classes:
C08G63/88; C08G63/08; C07B61/00; C08L101/16
Attorney, Agent or Firm:
Yusuke Hiraki