-
公开(公告)号：DE69605709D1
公开(公告)日：2000-01-27
申请号：DE69605709
申请日：1996-05-08
Applicant: UBE INDUSTRIES
Inventor： NISHIHIRA KEIGO , YOSHIDA SHINICHI , TANAKA SHUJI , ASADA YUTAKA
-
公开(公告)号：DE60123531D1
公开(公告)日：2006-11-16
申请号：DE60123531
申请日：2001-08-06
Applicant: UBE INDUSTRIES
Inventor： SUGISE RYOJI , TANAKA SHUJI , KASHIWAGI KOHICHI , DOI TAKASHI , II HIROFUMI , NISHIO MASAYUKI , YOSHIDA SHINICHI , ASADA YUTAKA , MIYAMOTO KAZUO
Abstract: A composition consisting essentially of a diaryl carbonate and contains a furan ring-containing compound in an amount of not more than 1ppm is favorably employable for producing less colored polycarbonate. A process for preparing a composition comprising a diaryl carbonate and a furan ring-containing compound in an amount of not more than 1ppm, from a reaction mixture of decarbonylation of a diaryl oxalate. A process for preparing polycarbonate which comprises reacting a polyhydric compound with a composition comprising a major portion of a diaryl carbonate and a furan ring-containing compound in an amount of not more than 1ppm.
-
公开(公告)号：DE69605709T2
公开(公告)日：2000-07-13
申请号：DE69605709
申请日：1996-05-08
Applicant: UBE INDUSTRIES
Inventor： NISHIHIRA KEIGO , YOSHIDA SHINICHI , TANAKA SHUJI , ASADA YUTAKA
-
公开(公告)号：DE60123531T2
公开(公告)日：2007-07-05
申请号：DE60123531
申请日：2001-08-06
Applicant: UBE INDUSTRIES
Inventor： SUGISE RYOJI , TANAKA SHUJI , KASHIWAGI KOHICHI , DOI TAKASHI , II HIROFUMI , NISHIO MASAYUKI , YOSHIDA SHINICHI , ASADA YUTAKA , MIYAMOTO KAZUO
Abstract: A composition consisting essentially of a diaryl carbonate and contains a furan ring-containing compound in an amount of not more than 1ppm is favorably employable for producing less colored polycarbonate. A process for preparing a composition comprising a diaryl carbonate and a furan ring-containing compound in an amount of not more than 1ppm, from a reaction mixture of decarbonylation of a diaryl oxalate. A process for preparing polycarbonate which comprises reacting a polyhydric compound with a composition comprising a major portion of a diaryl carbonate and a furan ring-containing compound in an amount of not more than 1ppm.
-
Patent Agency Ranking
公开(公告)号：AT341532T
公开(公告)日：2006-10-15
申请号：AT01118724
申请日：2001-08-06
Applicant: UBE INDUSTRIES
Inventor： SUGISE RYOJI , TANAKA SHUJI , KASHIWAGI KOHICHI , DOI TAKASHI , II HIROFUMI , NISHIO MASAYUKI , YOSHIDA SHINICHI , ASADA YUTAKA , MIYAMOTO KAZUO
Abstract: A composition consisting essentially of a diaryl carbonate and contains a furan ring-containing compound in an amount of not more than 1ppm is favorably employable for producing less colored polycarbonate. A process for preparing a composition comprising a diaryl carbonate and a furan ring-containing compound in an amount of not more than 1ppm, from a reaction mixture of decarbonylation of a diaryl oxalate. A process for preparing polycarbonate which comprises reacting a polyhydric compound with a composition comprising a major portion of a diaryl carbonate and a furan ring-containing compound in an amount of not more than 1ppm.
-
公开(公告)号：JPH11152252A
公开(公告)日：1999-06-08
申请号：JP26427198
申请日：1998-09-18
Applicant: UBE INDUSTRIES
Inventor： NISHIHIRA KEIGO , TANAKA HIDEJI , II HIROFUMI , YOSHIDA SHINICHI , ASADA YUTAKA , MIYAMOTO KAZUO
Abstract: PROBLEM TO BE SOLVED: To provide an industrially suitable process for the production of a diaryl carbonate by the decarbonylation reaction of a diaryl oxalate in the presence of a decarbonylation catalyst, especially an industrial process for producing a diaryl carbonate in high conversion and selectivity by using the diaryl oxalate and the decarbonylation catalyst in a state free from influence on the decarbonylation reaction. SOLUTION: A diaryl carbonate is produced by the decarbonylation reaction of a diaryl oxalate in the presence of a decarbonylation catalyst. A diaryl oxalate having controlled contents of aromatic hydroxy compounds, alkyl aryl oxalates, water and the like is used as the raw material. As an alternative, a diaryl oxalate having controlled water content and contained in a raw material mixture containing the diaryl oxalate and the decarbonylation catalyst is used as the raw material.
-
公开(公告)号：JPH08301818A
公开(公告)日：1996-11-19
申请号：JP11430595
申请日：1995-05-12
Applicant: UBE INDUSTRIES
Inventor： NISHIHIRA KEIGO , YOSHIDA SHINICHI , TANAKA HIDEJI , ASADA YUTAKA
Abstract: PURPOSE: To enable the efficient recovery of methyl nitrite in an absorbent solution and the resultant reduction in the loss of the methyl nitrite, further the reduction in the amount of the methyl nitrite or nitrogen oxide supplemented to a reactional system and the suppression of the amount of a purged circulating gas or the amount of supplemented carbon monoxide. CONSTITUTION: The produced dimethyl carbonate is absorbed in dimethyl oxalate which is an absorbing medium to provide an absorbent solution, which is then brought into contact with carbon monoxide fed from the outside of a gas circulating system to recover methyl nitrite in the absorbent solution in a method for producing the dimethyl carbonate by catalytically reacting the carbon monoxide with the methyl nitrite in the presence of a solid catalyst in the vapor phase.
-
公开(公告)号：JP2003226751A
公开(公告)日：2003-08-12
申请号：JP2002027681
申请日：2002-02-05
Applicant: UBE INDUSTRIES
Inventor： SUGISE RYOJI , YOSHIDA SHINICHI , TANAKA HIDEJI , ASADA YUTAKA
Abstract: PROBLEM TO BE SOLVED: To produce a high purity diphenyl carbonate composition which has reduced discoloration, and can be advantageously used in the production of a high-molecular weight polycarbonate. SOLUTION: The high purity diphenyl carbonate comprises methylphenylphenyl carbonate, and has a content of the methylphenylphenyl carbonate of ≤300 wt.ppm, and the total content of impurities including the methylphenylphenyl carbonate of ≤1 wt.% with the rest being diphenyl carbonate, reduces discoloration, and can be advantageously used in the production of a high-molecular weight polycarbonate. COPYRIGHT: (C)2003,JPO
-
公开(公告)号：JP2002053657A
公开(公告)日：2002-02-19
申请号：JP2000236878
申请日：2000-08-04
Applicant: UBE INDUSTRIES
Inventor： SUGISE RYOJI , YOSHIDA SHINICHI , TANAKA HIDEJI , ASADA YUTAKA , MIYAMOTO KAZUO , II HIROFUMI
Abstract: PROBLEM TO BE SOLVED: To provide a method by which a polycarbonate having excellent performances can be produced with good reproducibility according to a polycondensing reaction of a diaryl carbonate obtained by a decarbonylating reaction of a diaryl oxalate with a polyhydric hydroxy compound. SOLUTION: This method for producing the polycarbonate is characterized by subjecting the high-purity diaryl carbonate without containing >=1 ppm of a furan-based impurity and the polyhydric hydroxy compound to a polycondensing reaction.
-
-
-
-
-
-
-
-
Search Results
9
records
(took 0.019 seconds)
