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Patent Searching and Data


Title:
PREPARATION METHOD OF POLYALKYLENE CARBONATE
Document Type and Number:
WIPO Patent Application WO/2021/033917
Kind Code:
A1
Abstract:
The present invention relates to a method for preparation of a polyalkylene carbonate. More specifically, provided is a method for preparation of a polyalkylene carbonate, wherein a mixture obtained by removing unreacted carbon dioxide and a residual catalyst after the polymerization of a polyalkylene carbonate is fed into a stripper to result in the removal of an unreacted epoxide compound, and thereafter, before solvent removal, the temperature of the mixture stream is raised to the maximum through heat exchange, followed by a heating step, and then a solvent removal step is performed, whereby the steam usage required in the heating step can be decreased to prevent side reactions due to the unreacted epoxide compound, and the steam energy can be reduced in the solvent removal step.

Inventors:
HWANG WOOSUNG (KR)
KIM DONGMIN (KR)
PARK SEUNG YOUNG (KR)
KIM MI KYUNG (KR)
SHIN JOON HO (KR)
KIM WONSEOK (KR)
Application Number:
PCT/KR2020/008828
Publication Date:
February 25, 2021
Filing Date:
July 07, 2020
Export Citation:
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Assignee:
LG CHEMICAL LTD (KR)
International Classes:
C08G64/34; C08G64/40
Foreign References:
KR20160069250A2016-06-16
KR101308580B12013-09-12
KR20080017159A2008-02-26
JP2006104095A2006-04-20
KR101938338B12019-04-10
Other References:
See also references of EP 3831865A4
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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