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公开(公告)号：EP4269379A1
公开(公告)日：2023-11-01
申请号：EP21915226.1
申请日：2021-12-24
IPC分类号： C07C39/16 , C08G64/20 , C07C37/14 , C07C37/20 , C07C37/52 , C07C37/74 , C07C37/84 , C07B61/00
摘要： A method for producing bisphenol A that can efficiently remove coloring components derived from a polycarbonate resin to enable production of bisphenol A having good color tone is provided. In the method of the present invention for producing bisphenol A, a solution H1 or a solution H2 is obtained from a crude solution A obtained by degrading a polycarbonate resin (PC) and distilling off a solvent in step A and part of a mother liquor D obtained in step D of step B to step E to produce bisphenol A (BPA) by dehydration condensation of acetone and phenol, and the solution H1 or the solution H2 obtained is supplied to the step B or the step C. The solution H1 is a solution containing BPA obtained by degrading BPA contained in the crude solution A and the mother liquor D into phenol and isopropenylphenol and then rebonding phenol and isopropenylphenol, and the solution H2 is a solution containing phenol obtained by degrading BPA contained in the crude solution A and the mother liquor D into phenol and acetone.
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公开(公告)号：EP3939957A1
公开(公告)日：2022-01-19
申请号：EP20770715.9
申请日：2020-02-26
发明人： UCHIYAMA, Kei , YOKOGI, Masashi , SHIBATA, Hiroki , TOMITA, Sora , YAYAMA, Yuichi , TSURUHARA, Kenji , YOSHIDA, Takayuki , NAKASHIMA, Yukie , KONISHI, Rie , HIROWATARI, Kazuo
摘要： A bisphenol composition comprising 95% or more by mass of a bisphenol,
wherein a bisphenol represented by the following general formula (II) in the bisphenol composition constitutes 150 mass ppm or more, and
the bisphenol composition has a methanol dissolution color (Hazen color number) of 2 or less,
wherein X denotes a single bond, -CR 11 R 12 -, -O-, -CO-, - S-, -SO-, or -SO 2 -, R 11 and R 12 independently denote a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and R 11 and R 12 may be bonded to each other to form a ring. A method for producing a polycarbonate resin using the bisphenol composition.-
公开(公告)号：EP3940015A1
公开(公告)日：2022-01-19
申请号：EP20770142.6
申请日：2020-02-26
发明人： UCHIYAMA, Kei , YOKOGI, Masashi , SHIBATA, Hiroki , TOMITA, Sora , YAYAMA, Yuichi , TSURUHARA, Kenji , YOSHIDA, Takayuki , NAKASHIMA, Yukie , KONISHI, Rie , HIROWATARI, Kazuo
摘要： A bisphenol composition comprising 95% or more by mass of a bisphenol and 200 mass ppm or more of a compound represented by the following general formula (II),
wherein R 21 and R 22 denote a methyl group or a hydrogen atom, R 22 is a methyl group when R 21 is a hydrogen atom, R 22 is a hydrogen atom when R 21 is a methyl group, R 23 to R 25 independently denote a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, and R 23 , R 24 , and R 25 may be bonded or cross-linked between two of the groups. A method for producing a polycarbonate resin using the bisphenol composition.-
公开(公告)号：EP4253356A1
公开(公告)日：2023-10-04
申请号：EP21897821.1
申请日：2021-11-17
发明人： UCHIYAMA, Kei
IPC分类号： C07C37/52 , C07C37/68 , C07C39/16 , C07C68/08 , C07C69/96 , C08G64/04 , C08G64/06 , C08G64/20 , C08J11/16 , C08J11/24 , C08J11/28
摘要： A method for degrading a polycarbonate resin that can degrade a polycarbonate resin with high reactivity even under a condition that is mild and has a small environmental load is provided. In addition, a method for producing an alkyl aryl carbonate that can degrade a polycarbonate resin even under a condition that is mild and has a small environmental load and can efficiently obtain a dialkyl aryl carbonate is provided. A method for degrading a polycarbonate resin, comprising, in a slurry-like reaction liquid comprising a polycarbonate resin, an aromatic monoalcohol, an aliphatic monoalcohol, and a catalyst, degrading the polycarbonate resin. In addition, a method for producing an alkyl aryl carbonate, comprising: a polycarbonate resin degradation step of degrading a polycarbonate resin in the presence of an aromatic monoalcohol, an aliphatic monoalcohol, and a catalyst; and an alkyl aryl carbonate recovery step of recovering an alkyl aryl carbonate generated by the degradation of the polycarbonate.
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公开(公告)号：EP4238954A1
公开(公告)日：2023-09-06
申请号：EP21886293.6
申请日：2021-10-28
发明人： UCHIYAMA, Kei , NAKAMURA, Makoto
IPC分类号： C07C37/52 , C01B32/50 , C07C39/16 , C07C68/04 , C07C69/96 , C08G59/06 , C08G64/30 , C08J11/24 , C08J11/28 , C07B61/00
摘要： A method for producing a bisphenol or the like by using a chemical recycling method that is moderate, has a small environmental load, and can efficiently degrade a polycarbonate resin is provided. In addition, a method for producing a recycled polycarbonate resin or the like by using a useful substance such as the bisphenol or the like is provided. A method for producing a bisphenol, comprising degrading a polycarbonate resin in the presence of an aromatic monoalcohol, water, and a catalyst. A method for producing carbon dioxide, comprising recovering carbon dioxide generated by the method for producing a bisphenol. A method for producing a carbonic acid diester by using the carbon dioxide. A method for producing a recycled polycarbonate resin by using the bisphenol and/or the carbonic acid diester. A method for producing an epoxy resin and a method for producing an epoxy resin cured product, by using the bisphenol
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