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公开(公告)号：DE3760226D1
公开(公告)日：1989-07-13
申请号：DE3760226
申请日：1987-02-09
Applicant: BASF AG
Inventor： STEINIGER MICHAEL DR , STROEFER ECKHARD DR
IPC: C07D231/12 , C25B3/23 , C25B3/02
Abstract: 1. A process for preparing a pyrazole of the general formula see diagramm : EP0237762,P5,F1 where R**1, R**2 and R**3 are each hydrogen, alkyl, cycloalkyl or aryl, which comprises electrochemically oxidizing a 2-pyrazoline of the general formula see diagramm : EP0237762,P5,F2 where R**1, R**2 and R**3 have the abovementioned meanings, in the presence of an ionic halide.
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12.发明专利
公开(公告)号：DE19804918A1
公开(公告)日：1999-08-12
申请号：DE19804918
申请日：1998-02-07
Applicant: BASF AG
Inventor： STROEFER ECKHARD DR , PFAB PETER DR , JACOBS JOHANNES , SEYFERT WILFRIED DR , PETERSEN PETER DR
IPC: C07C209/60 , C07C211/50
Abstract: In a process for the production of methylene-di-phenylamine from aniline (A) and formaldehyde (F) in presence of a protic acid, the condensation is carried out at 80-250 deg C and the reaction mixture in the condensation stage is homogenized in a dynamic or static mixer.
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公开(公告)号：DE19804916A1
公开(公告)日：1999-08-12
申请号：DE19804916
申请日：1998-02-07
Applicant: BASF AG
Inventor： STROEFER ECKHARD DR , CAESAR FRIEDRICH DR , PENZEL ULRICH DR , SCHARR VOLKER , GMEREK KARL-HEINZ , HASSE HANS DR
IPC: C07C209/78 , C07C211/50
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公开(公告)号：DE19733681A1
公开(公告)日：1999-02-11
申请号：DE19733681
申请日：1997-08-04
Applicant: BASF AG
Inventor： WATZENBERGER OTTO DR , MAUER PETER , STROEFER ECKHARD DR , SCHELLING HEINER , SCHNEIDER HANS-MICHAEL DR
IPC: C01B21/14
Abstract: The invention relates to a method for producing an aqueous solution of free hydroxylamine by treating a hydroxylammonium salt with ammonia in the counter-current in a stripping column. As a result, hydroxylamine is released and at the same time, the solution obtained is separated into an aqueous hydroxylamine solution and a salt fraction by distillation. The inventive method is simple and mild, and can be carried out on a large scale. The risk of decomposition is minimal due to the low thermal burden, the low concentration of hydroxylamine and the short residence time involved in the process.
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公开(公告)号：DE19725851A1
公开(公告)日：1998-12-24
申请号：DE19725851
申请日：1997-06-18
Applicant: BASF AG
Inventor： WATZENBERGER OTTO DR , SCHELLING HEINER , PFAB PETER DR , STROEFER ECKHARD DR
Abstract: The invention relates to a method for the production of highly pure aqueous solution from free hydroxylamine, wherein the diluted aqueous hydroxylamine solution is concentrated in a column, the vapor containing hydroxylamine is removed from the bottom of the column via a side-stream and highly pure hydroxylamine is obtained through condensation of the vapors. The inventive method is simple and mild, can be used in large-scale production and yields "electronic grade" hydroxylamine.
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Patent Agency Ranking
公开(公告)号：MY141052A
公开(公告)日：2010-02-25
申请号：MYPI20040732
申请日：2004-03-03
Applicant: BASF AG
Inventor： STROEFER ECKHARD DR , LANG NEVEN DR , STEINBRENNER ULRICH DR , HASSE HANS PROF DR , OTT MICHAEL , GRUETZNER THOMAS
IPC: C07C45/78 , C07C45/00 , C07C45/82 , C07C47/058
Abstract: PROCESS FOR PREPARING HIGH-CONCENTRATION GASEOUS FORMALDEHYDE HAVING A MOLAR CH2O:H2O RATIO OF >= O.6 FROM AN AQUEOUS FORMALDEHYDE SOLUTION BY EVAPORATION OF AT LEAST PART OF THE SOLUTION, IN WHICH THE AQUEOUS FORMALDEHYDE SOLUTION IS HEATED TO A VAPORIZATION TEMPERATURE T AND THE GAS PHASE FORMED IS TAKEN OFF, WHEREIN THE EVAPORATION TEMPERATURE T OBEYS THE RELATIONSHIP:
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公开(公告)号：MY139807A
公开(公告)日：2009-10-30
申请号：MYPI20050531
申请日：2005-02-14
Applicant: BASF AG
Inventor： RUMPF BERND DR , STROEFER ECKHARD DR , LANG ORTMUND , LANG NEVEN DR
Abstract: A PROCESS FOR PREPARING A HIGH-CONCENTRATION FORMALDEHYDE SOLUTION BY REMOVING WATER FROM A LOWER-CONCENTRATION FORMALDEHYDE SOLUTION HAVING A FORMALDEHYDE CONTENT OF FROM 5 TO 50% BY WEIGHT, IN WHICH THE LOWER-CONCENTRATION FORMALDEHYDE SOLUTION IS FED TO A PREHEATER AND HEATED IN THE PREHEATER, DEPESSURIZED VIA A PRESSURE MAINTENANCE DEVICE AND CONCENTRATED IN A HELICAL TUBE EVAPORATOR TO GIVE A VAPOR STREAM AND THE HIGH-CONCENTRATION FORMALDEHYDE SOLUTION AS BOTTOM STREAM, WHEREIN THE HEATED LOWER-CONCENTRATION FORMALDEHYDE SOLUTION IS DEPRESSURIZED IN THE PRESSURE MAINTENANCE DEVICE TO GIVE A TWO-PHASE MIXTURE WHICH IS FED INTO THE HELICAL TUBE EVAPORATOR, IS PROPOSED.
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公开(公告)号：DK1310172T3
公开(公告)日：2005-11-14
申请号：DK02024989
申请日：2002-11-07
Applicant: BASF AG
Inventor： WEBER MARKUS DR , STROEFER ECKHARD DR , WOSTBROCK KARL-HEINZ DR
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公开(公告)号：AT303074T
公开(公告)日：2005-09-15
申请号：AT02024989
申请日：2002-11-07
Applicant: BASF AG
Inventor： STROEFER ECKHARD DR , WOSTBROCK KARL-HEINZ DR , WEBER MARKUS DR
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公开(公告)号：AT253543T
公开(公告)日：2003-11-15
申请号：AT00111802
申请日：2000-06-06
Applicant: BASF AG
Inventor： STROEFER ECKHARD DR , SCHOLL STEPHAN DR , HASSE HANS PROF DR
IPC: B01D1/22 , C07B63/00 , C07C29/80 , C07C41/56 , C07C43/303 , C07C45/82 , C07C47/04 , C07C47/058
Abstract: A method for reacting a solution containing a mixture of at least two chemicals in chemical equilibrium with other chemical(s) involves: (a) separating the solution into at least two fractions, enriched in the various compounds relative to the equilibrium concentrations; and (b) reacting one fraction with the other reactant(s) before equilibrium is completely restored. A method for reacting a solution containing a mixture of at least two chemicals in chemical equilibrium with other chemical(s) involves: (1) separating the solution into at least two fractions, enriched in the various compounds relative to the equilibrium concentrations; and (2) reacting one fraction with the other reactant(s) before equilibrium is completely restored. Excluded is the reaction of a formaldehyde solution, containing polyoxymethylene glycols and optionally monomeric formaldehyde and/or methylene glycol, with aniline in presence of an acid catalyst.
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