Title:
METHOD FOR PRODUCING AROMATIC BIS(HYDROXYALKYL) DICARBOXYLATE AND METHOD FOR PRODUCING RECYCLED AROMATIC POLYESTER
Document Type and Number:
WIPO Patent Application WO/2023/190102
Kind Code:
A1
Abstract:
Provided is a method for producing an aromatic bis(hydroxyalkyl) dicarboxylate by depolymerizing a polyester in the presence of a catalyst. This method for producing an aromatic bis(hydroxyalkyl) dicarboxylate by depolymerizing a polyester in the presence of a catalyst is characterized in that the catalyst is a manganese-based catalyst and the used amount of the catalyst with respect to the polyester is 20-500 mmol%. Also provided is a method for producing a polyester polymer and an intermediate thereof, wherein the polyester polymer is produced by performing re-polymerization using the aromatic bis(hydroxyalkyl) dicarboxylate as a raw material, and the polyester polymer has less coloration like a virgin product (product which is produced by polymerizing monomers without performing depolymerization).
Inventors:
TSURUDA RYO (JP)
SUNOUCHI SATOSHI (JP)
SUNOUCHI SATOSHI (JP)
Application Number:
PCT/JP2023/011694
Publication Date:
October 05, 2023
Filing Date:
March 24, 2023
Export Citation:
Assignee:
TEIJIN FRONTIER CO LTD (JP)
International Classes:
C07C67/29; C08G63/181; C08G63/78
Domestic Patent References:
| WO2001030729A1 | 2001-05-03 |
Foreign References:
| JP2013185152A | 2013-09-19 | |||
| JP2010089401A | 2010-04-22 | |||
| JPH11228677A | 1999-08-24 | |||
| JP2013057006A | 2013-03-28 | |||
| JPH09208524A | 1997-08-12 | |||
| JP2002060542A | 2002-02-26 |
Attorney, Agent or Firm:
TAMEYAMA Taro (JP)
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