Method for producing bisphenol and method for producing polycarbonate resin

JP7632121B2Active Publication Date: 2025-02-19MITSUBISHI CHEM CORP
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Patent Information

Application Number
JP2021107770
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2021-06-29
Publication Date
2025-02-19
Estimated Expiration
2041-06-29

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Abstract

To provide a method for producing bisphenol which is excellent in polymerization activity, and to product a high quality polycarbonate resin having a desired molecular weight using bisphenol produced by the method for producing the bisphenol.SOLUTION: A method for producing bisphenol includes: a dissolution step of dissolving a solid containing bisphenol in an organic solvent, and obtaining bisphenol solution; a basic nitrogen-containing compound addition step of adding a basic nitrogen-containing compound to the obtained bisphenol solution; and a crystallization step of depositing bisphenol from the bisphenol solution to which the basic nitrogen-containing compound has been added. A method for producing a polycarbonate resin uses the bisphenol produced by the method for producing the bisphenol.SELECTED DRAWING: None
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Citation Information

Patent Citations

  • Method of producing bisphenol compound

    JP2014040376A

  • Method for producing bisphenol and method for producing polycarbonate resin

    JP2020037530A

  • Method for producing bisphenol and method for producing polycarbonate resin

    WO2020189201A1