Title:
METHOD FOR PRODUCING BISPHENOL, METHOD FOR PRODUCING EPOXY RESIN, METHOD FOR PRODUCING EPOXY RESIN CURED PRODUCT, AND BISPHENOL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2024/070871
Kind Code:
A1
Abstract:
The problem addressed is to provide a method for producing bisphenol that can decompose a thermosetting resin cured product, utilize the properties of the bisphenol in the decomposition solution obtained, and again produce high-purity bisphenol. The problem is solved by a method for producing bisphenol that includes the following steps A to D. Step A: step that decomposes a thermosetting resin and obtains a decomposition solution A containing bisphenol. Step B: step that mixes the decomposition solution A obtained in step A with water and obtains a phase separation solution B. Step C: step that separates an aqueous phase C from the phase separation solution B obtained in step B. Step D: step that mixes the aqueous phase C obtained in step C with an acidic solution.
Inventors:
TAMURA TAKAAKI (JP)
UCHIYAMA KEI (JP)
KONDO YOSUKE (JP)
UCHIYAMA KEI (JP)
KONDO YOSUKE (JP)
Application Number:
PCT/JP2023/034194
Publication Date:
April 04, 2024
Filing Date:
September 21, 2023
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
International Classes:
C07C37/72; C07C37/52; C07C37/88; C07C39/16; C07C43/23; C08G59/06; C08G59/20; C08G59/62; C08J11/16; C08J11/24
Domestic Patent References:
| WO2017154102A1 | 2017-09-14 | |||
| WO2022092176A1 | 2022-05-05 |
Foreign References:
| JP2001172426A | 2001-06-26 | |||
| US20180066505A1 | 2018-03-08 |
Attorney, Agent or Firm:
IP FIRM SHUWA (JP)
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