Title:
BISPHENOL PRODUCTION METHOD, RECYCLED POLYCARBONATE RESIN PRODUCTION METHOD, EPOXY RESIN PRODUCTION METHOD, CURED EPOXY RESIN PRODUCTION METHOD, AND BISPHENOL-ALKYL CARBONATE CONDENSATE PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/163026
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a bisphenol production method in which, using a highly-versatile catalyst, a polycarbonate resin is decomposed with a high level of reactivity to produce bisphenol. Provided is a bisphenol production method which carries out a decomposition reaction of a polycarbonate resin in a reaction liquid containing the polycarbonate resin, a dialkyl carbonate, an aliphatic monoalcohol and a catalyst, wherein the molar ratio of the dialkyl carbonate to be used in the decomposition reaction to 1 mole of a bisphenol-derived repeating unit of the polycarbonate resin to be used in the decomposition reaction is 1.8 or more, and the catalyst is one selected from the group consisting of an alkali metal hydroxide, an alkali metal carbonate, an alkali metal alkoxide, an alkali metal oxide, a chain alkylamine and pyridine.
Inventors:
UCHIYAMA KEI (JP)
OTA KAZUMASA (JP)
NAKASHIMA YUKIE (JP)
UCHIBORI TOSHIO (JP)
OTA KAZUMASA (JP)
NAKASHIMA YUKIE (JP)
UCHIBORI TOSHIO (JP)
Application Number:
PCT/JP2023/006417
Publication Date:
August 31, 2023
Filing Date:
February 22, 2023
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
International Classes:
C07C37/52; C07B61/00; C07C37/01; C07C37/055; C07C39/06; C07C39/16; C07C68/00; C07C68/06; C07C69/96; C08G59/06; C08G59/24; C08G64/04
Domestic Patent References:
| WO2020257234A1 | 2020-12-24 |
Foreign References:
| JP2004051620A | 2004-02-19 | |||
| JP2005008773A | 2005-01-13 | |||
| JP2003231774A | 2003-08-19 | |||
| JP2004339389A | 2004-12-02 |
Attorney, Agent or Firm:
MINASE, Toru et al. (JP)
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