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公开(公告)号：EP0931015A1
公开(公告)日：1999-07-28
申请号：EP97912088.0
申请日：1997-10-01
申请人： BAYER AG
IPC分类号： C01B17
CPC分类号： C01B17/88 , Y10S159/02 , Y10S159/16 , Y10S159/19
摘要： The present invention pertains to a method for upgrading used sulfuric acids, especially those which are produced during hydrocarbon nitration using nitric acid in the presence of sulfuric acid. The upgrading is achieved by a multistage process.
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公开(公告)号：EP1023261B1
公开(公告)日：2002-03-06
申请号：EP98951488.0
申请日：1998-10-02
申请人： BAYER AG
发明人： BECKHAUS, Heiko , LANGER, Reinhard
IPC分类号： C07C209/36
CPC分类号： C07C209/36 , C07C211/50
摘要： The invention relates to a continuous method for producing aromatic diamines and/or polyamines by means of catalytic hydrogenation of corresponding aromatic dinitro and/or polynitro compounds with hydrogen. The invention is characterized in that in a reactor with a catalytic fixed bed or shower bed with a pressure ranging from 5 to 100 bar and at a reaction temperature ranging from 100 to 220 °C, a) the aromatic dinitro and/or polynitro compounds are optionally introduced in the presence of a solvent in a product stream comprised of an essentially recycled hydrogenated product, water and hydrogen, and b) a part of the product stream is continuously withdrawn from the reactor system.
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公开(公告)号：EP1023261A1
公开(公告)日：2000-08-02
申请号：EP98951488.0
申请日：1998-10-02
申请人： BAYER AG
发明人： BECKHAUS, Heiko , LANGER, Reinhard
IPC分类号： C07C209/36
CPC分类号： C07C209/36 , C07C211/50
摘要： The invention relates to a continuous method for producing aromatic diamines and/or polyamines by means of catalytic hydrogenation of corresponding aromatic dinitro and/or polynitro compounds with hydrogen. The invention is characterized in that in a reactor with a catalytic fixed bed or shower bed with a pressure ranging from 5 to 100 bar and at a reaction temperature ranging from 100 to 220 °C, a) the aromatic dinitro and/or polynitro compounds are optionally introduced in the presence of a solvent in a product stream comprised of an essentially recycled hydrogenated product, water and hydrogen, and b) a part of the product stream is continuously withdrawn from the reactor system.
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公开(公告)号：EP0784505B1
公开(公告)日：1998-08-26
申请号：EP95935373.1
申请日：1995-09-25
申请人： BAYER AG
发明人： WITT, Harro , ZARNACK, Uwe, Jens , BECKHAUS, Heiko
CPC分类号： B01J19/0013 , B01J8/1836 , B01J8/226 , B01J19/1875 , B01J2208/0007 , B01J2208/00079 , B01J2208/00212 , B01J2219/00085 , C07C209/36
摘要： A reactor (1) for exothermic sludge phase reactions has as heat exchanger (2) a ring-shaped chamber immersed in the reaction mass inside the reactor. The ring-shaped chamber has a plurality of vertical reaction mass flow channels (21) with a round cross-section and the coolant flows through the ring-shaped chamber between the reaction mass flow channels.
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公开(公告)号：EP0931015B1
公开(公告)日：2002-02-20
申请号：EP97912088.8
申请日：1997-10-01
申请人： BAYER AG
IPC分类号： C01B17/88
CPC分类号： C01B17/88 , Y10S159/02 , Y10S159/16 , Y10S159/19
摘要： The present invention pertains to a method for upgrading used sulfuric acids, especially those which are produced during hydrocarbon nitration using nitric acid in the presence of sulfuric acid. The upgrading is achieved by a multistage process.
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公开(公告)号：EP0784505A1
公开(公告)日：1997-07-23
申请号：EP95935373.0
申请日：1995-09-25
申请人： BAYER AG
发明人： WITT, Harro , ZARNACK, Uwe, Jens , BECKHAUS, Heiko
CPC分类号： B01J19/0013 , B01J8/1836 , B01J8/226 , B01J19/1875 , B01J2208/0007 , B01J2208/00079 , B01J2208/00212 , B01J2219/00085 , C07C209/36
摘要： A reactor (1) for exothermic sludge phase reactions has as heat exchanger (2) a ring-shaped chamber immersed in the reaction mass inside the reactor. The ring-shaped chamber has a plurality of vertical reaction mass flow channels (21) with a round cross-section and the coolant flows through the ring-shaped chamber between the reaction mass flow channels.
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