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公开(公告)号：JPH1087540A
公开(公告)日：1998-04-07
申请号：JP17506997
申请日：1997-07-01
Applicant: GEN ELECTRIC
Inventor： PAULUS JOHANNES MARI EIJSBOUTS , DE HEER JOS , HOOGLAND GABRIE , NANGUNERI SRIKANTH , DE WIT GERT
Abstract: PROBLEM TO BE SOLVED: To recover bis-phenol A from compositions containing reaction residue of a dihydric phenol, particularly bis-phenol A units. SOLUTION: A bis-phenol A-containing polymer is roughly crushed and the crushed granules are treated with an organic swelling solvent which is compatible to water such as an alcohol or other solvent and can be readily distilled off from the aqueous solution for a time enough to swell the crushed granules. Then, the swollen crushed granules are brought into contact with an aqueous ammonia which can selectively cleave the ester bonds of the bis-phenol A residual units at a temperature of >=25 deg.C to form the liquid phase and the solid phase. The liquid phase is separated from the solid phase, ammonia and the organic swelling solvent are distilled out of the liquid phase to obtain an aqueous solution containing dissolved urea, partially precipitated bis-phenol A. A sufficient amount of water is added to the solution to precipitate bis-phenol A to form the liquid phase the solid phase. Finally, the bis phenol A of the solid phase is recovered and dried.
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公开(公告)号：ES2157528T3
公开(公告)日：2001-08-16
申请号：ES97304755
申请日：1997-07-01
Applicant: GEN ELECTRIC
Inventor： EIJSBOUTS PAULUS JOHANNES MARI , DE HEER JOS , HOOGLAND GABRIE , NANGUNERI SRIKANTH , DE WIT GERT
Abstract: A method of recovering a dihydric phenol from a composition containing a thermoplastic polymer having the reaction residue of dihydric phenol units in the polymer structure, comprises: (a) granulating a composition containing a thermoplastic polymer having the reaction residue of dihydric phenol units in the polymer structure; (b) treating the granulated particles of the thermoplastic composition with an organic swelling solvent that is miscible with water and is easily distilled off from an aqueous solution and for a time sufficient to swell the particles; (c) contacting the swelled granulated particles with an aqueous ammoniacal solution of sufficient molar strength to severe selectively the ester bonds of the reaction residue of the dihydric phenol units in the thermoplastic polymer and at least 25[deg]C, forming a solid phase and a liquid phase; (d) separating the liquid phase from the solid phase; (e) distilling the ammonia and the organic swelling solvent from the liquid phase; (f) adding sufficient water to the residue which contains dissolved urea and partially precipitated dihydric phenol forming a liquid and a solid phase of dihydric phenol; and (g) separating the insoluble; solid dihydric phenol portion from the liq. phase. Also claimed is the polycarbonate prepared from bisphenol-A obtained by a preferred method.
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公开(公告)号：CZ325898A3
公开(公告)日：1999-08-11
申请号：CZ325898
申请日：1998-01-08
Applicant: GEN ELECTRIC
Inventor： LISKA JURAJ , VAN AERT HUBERTUS ADRIANUS MAR , DE WIT GERT
IPC: C08G65/48
Abstract: The present invention deals with the distribution of polyphenylene ethers 1. by reacting the polyphenylene ether in solution with a phenolic compound, wherein special phenolic compounds are used. The redistribution reaction can be performed in toluene or in toluene/alcohol blends. The reaction can be run in the presence or the absence of a catalyst. By using a process for the redistribution of polyphenylene ethers by reacting the polyphenylene ether in solution with a phenolic compound, wherein the polyphenylene ether is reacted with a phenolic compound with formula 3 wherein the phenolic rings are disubstituted with methyl groups or ethyl groups in the ortho positions and the group X is separated from the phenolic ring through at least two carbon atoms and the phenolic compound has a molecular weight of not more than 400 g/mol, preferably not more than 300 g/mol and the redistribution is performed in a mixture of toluene and methanol with 1-30 volume % of methanol or in toluene in the presence of a phase transfer catalyst such as tri (C8-C1O alkyl) methyl ammonium chloride as a promoter; and a diphenoquinone, preferably of 3,3',5,5'-tetramethyl-4,4'-diphenoquinone is used as a catalyst and the molar concentration of the phenolic compound is chosen between 0.9 to 1.1 times the molar quantity of monomeric units in the polyphenylene ether in the reaction solution, more than 90% of the phenolic compound can be incorporated in the polyphenylene.
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公开(公告)号：DE69705164T2
公开(公告)日：2002-03-07
申请号：DE69705164
申请日：1997-07-01
Applicant: GEN ELECTRIC
Inventor： EIJSBOUTS PAULUS JOHANNES MARI , DE HEER JOS , HOOGLAND GABRIE , NANGUNERI SRIKANTH , DE WIT GERT
Abstract: A method of recovering a dihydric phenol from a composition containing a thermoplastic polymer having the reaction residue of dihydric phenol units in the polymer structure, comprises: (a) granulating a composition containing a thermoplastic polymer having the reaction residue of dihydric phenol units in the polymer structure; (b) treating the granulated particles of the thermoplastic composition with an organic swelling solvent that is miscible with water and is easily distilled off from an aqueous solution and for a time sufficient to swell the particles; (c) contacting the swelled granulated particles with an aqueous ammoniacal solution of sufficient molar strength to severe selectively the ester bonds of the reaction residue of the dihydric phenol units in the thermoplastic polymer and at least 25[deg]C, forming a solid phase and a liquid phase; (d) separating the liquid phase from the solid phase; (e) distilling the ammonia and the organic swelling solvent from the liquid phase; (f) adding sufficient water to the residue which contains dissolved urea and partially precipitated dihydric phenol forming a liquid and a solid phase of dihydric phenol; and (g) separating the insoluble; solid dihydric phenol portion from the liq. phase. Also claimed is the polycarbonate prepared from bisphenol-A obtained by a preferred method.
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公开(公告)号：DE69705164D1
公开(公告)日：2001-07-19
申请号：DE69705164
申请日：1997-07-01
Applicant: GEN ELECTRIC
Inventor： EIJSBOUTS PAULUS JOHANNES MARI , DE HEER JOS , HOOGLAND GABRIE , NANGUNERI SRIKANTH , DE WIT GERT
Abstract: A method of recovering a dihydric phenol from a composition containing a thermoplastic polymer having the reaction residue of dihydric phenol units in the polymer structure, comprises: (a) granulating a composition containing a thermoplastic polymer having the reaction residue of dihydric phenol units in the polymer structure; (b) treating the granulated particles of the thermoplastic composition with an organic swelling solvent that is miscible with water and is easily distilled off from an aqueous solution and for a time sufficient to swell the particles; (c) contacting the swelled granulated particles with an aqueous ammoniacal solution of sufficient molar strength to severe selectively the ester bonds of the reaction residue of the dihydric phenol units in the thermoplastic polymer and at least 25[deg]C, forming a solid phase and a liquid phase; (d) separating the liquid phase from the solid phase; (e) distilling the ammonia and the organic swelling solvent from the liquid phase; (f) adding sufficient water to the residue which contains dissolved urea and partially precipitated dihydric phenol forming a liquid and a solid phase of dihydric phenol; and (g) separating the insoluble; solid dihydric phenol portion from the liq. phase. Also claimed is the polycarbonate prepared from bisphenol-A obtained by a preferred method.
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Patent Agency Ranking
公开(公告)号：DE69808707D1
公开(公告)日：2002-11-21
申请号：DE69808707
申请日：1998-01-08
Applicant: GEN ELECTRIC
Inventor： LISKA JURAJ , VAN AERT ADRIANUS , DE WIT GERT
IPC: C08G65/48
Abstract: The present invention deals with the distribution of polyphenylene ethers 1. by reacting the polyphenylene ether in solution with a phenolic compound, wherein special phenolic compounds are used. The redistribution reaction can be performed in toluene or in toluene/alcohol blends. The reaction can be run in the presence or the absence of a catalyst. By using a process for the redistribution of polyphenylene ethers by reacting the polyphenylene ether in solution with a phenolic compound, wherein the polyphenylene ether is reacted with a phenolic compound with formula 3 wherein the phenolic rings are disubstituted with methyl groups or ethyl groups in the ortho positions and the group X is separated from the phenolic ring through at least two carbon atoms and the phenolic compound has a molecular weight of not more than 400 g/mol, preferably not more than 300 g/mol and the redistribution is performed in a mixture of toluene and methanol with 1-30 volume % of methanol or in toluene in the presence of a phase transfer catalyst such as tri (C8-C1O alkyl) methyl ammonium chloride as a promoter; and a diphenoquinone, preferably of 3,3',5,5'-tetramethyl-4,4'-diphenoquinone is used as a catalyst and the molar concentration of the phenolic compound is chosen between 0.9 to 1.1 times the molar quantity of monomeric units in the polyphenylene ether in the reaction solution, more than 90% of the phenolic compound can be incorporated in the polyphenylene.
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公开(公告)号：AT226223T
公开(公告)日：2002-11-15
申请号：AT98901740
申请日：1998-01-08
Applicant: GEN ELECTRIC
Inventor： LISKA JURAJ , VAN AERT HUBERTUS ADRIANUS MAR , DE WIT GERT
IPC: C08G65/48
Abstract: The present invention deals with the distribution of polyphenylene ethers 1. by reacting the polyphenylene ether in solution with a phenolic compound, wherein special phenolic compounds are used. The redistribution reaction can be performed in toluene or in toluene/alcohol blends. The reaction can be run in the presence or the absence of a catalyst. By using a process for the redistribution of polyphenylene ethers by reacting the polyphenylene ether in solution with a phenolic compound, wherein the polyphenylene ether is reacted with a phenolic compound with formula 3 wherein the phenolic rings are disubstituted with methyl groups or ethyl groups in the ortho positions and the group X is separated from the phenolic ring through at least two carbon atoms and the phenolic compound has a molecular weight of not more than 400 g/mol, preferably not more than 300 g/mol and the redistribution is performed in a mixture of toluene and methanol with 1-30 volume % of methanol or in toluene in the presence of a phase transfer catalyst such as tri (C8-C1O alkyl) methyl ammonium chloride as a promoter; and a diphenoquinone, preferably of 3,3',5,5'-tetramethyl-4,4'-diphenoquinone is used as a catalyst and the molar concentration of the phenolic compound is chosen between 0.9 to 1.1 times the molar quantity of monomeric units in the polyphenylene ether in the reaction solution, more than 90% of the phenolic compound can be incorporated in the polyphenylene.
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公开(公告)号：DE69808707T2
公开(公告)日：2003-06-12
申请号：DE69808707
申请日：1998-01-08
Applicant: GEN ELECTRIC
Inventor： LISKA JURAJ , VAN AERT ADRIANUS , DE WIT GERT
IPC: C08G65/48
Abstract: The present invention deals with the distribution of polyphenylene ethers 1. by reacting the polyphenylene ether in solution with a phenolic compound, wherein special phenolic compounds are used. The redistribution reaction can be performed in toluene or in toluene/alcohol blends. The reaction can be run in the presence or the absence of a catalyst. By using a process for the redistribution of polyphenylene ethers by reacting the polyphenylene ether in solution with a phenolic compound, wherein the polyphenylene ether is reacted with a phenolic compound with formula 3 wherein the phenolic rings are disubstituted with methyl groups or ethyl groups in the ortho positions and the group X is separated from the phenolic ring through at least two carbon atoms and the phenolic compound has a molecular weight of not more than 400 g/mol, preferably not more than 300 g/mol and the redistribution is performed in a mixture of toluene and methanol with 1-30 volume % of methanol or in toluene in the presence of a phase transfer catalyst such as tri (C8-C1O alkyl) methyl ammonium chloride as a promoter; and a diphenoquinone, preferably of 3,3',5,5'-tetramethyl-4,4'-diphenoquinone is used as a catalyst and the molar concentration of the phenolic compound is chosen between 0.9 to 1.1 times the molar quantity of monomeric units in the polyphenylene ether in the reaction solution, more than 90% of the phenolic compound can be incorporated in the polyphenylene.
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公开(公告)号：CZ9803258A3
公开(公告)日：1999-08-11
申请号：CZ325898
申请日：1998-01-08
Applicant: GEN ELECTRIC
Inventor： LISKA JURAJ , VAN AERT HUBERTUS ADRIANUS MAR , DE WIT GERT
IPC: C08G65/48
CPC classification number: C08G65/485
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公开(公告)号：CA2250841A1
公开(公告)日：1998-08-20
申请号：CA2250841
申请日：1998-01-08
Applicant: GEN ELECTRIC
Inventor： DE WIT GERT , VAN AERT HUBERTUS ADRIANUS MAR , LISKA JURAJ
IPC: C08G65/48
Abstract: The present invention deals with the distribution of polyphenylene ethers by reacting the polyphenylene ether in solution with a phenolic compound, wherein special phenolic compounds are used. The redistribution reaction can be performed in toluene or in toluene/alcohol blends. The reaction can be run in the presence or the absence of a catalyst. By using a process for the redistribution of polyphenylene ethers by reacting the polyphenylene ether in solution with a phenolic compound, wherein the polyphenylene ether is reacted with a phenolic compound with formula 3 wherein the phenolic rings are disubstituted with methyl groups or ethyl groups in the ortho positions and the group X is separated from the phenolic ring through at least two carbon atoms and the phenolic compound has a molecular weight of not more than 400 g/mol, preferably not more than 300 g/mol and the redistribution is performed in a mixture of toluene and methanol with 1-30 volume % of methanol or in toluene in the presence of a phase transfer catalyst such as tri(C8-C10 alkyl) methyl ammonium chloride as a promoter; and a diphenoquinone, preferably of 3,3',5,5'-tetramethyl-4,4'-diphenoquinone is used as a catalyst and the molar concentration of the phenolic compound is chosen between 0.9 to 1.1 times the molar quantity of monomeric units in the polyphenylene ether in the reaction solution, more than 90 % of the phenolic compound can be incorporated in the polyphenylene.
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