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公开(公告)号：BR9403209A
公开(公告)日：1995-04-11
申请号：BR9403209
申请日：1994-08-10
Applicant: HOECHST AG
Inventor： ALBERTI KLAUS DR , RITTER EBERHARD DR , WESTPHAL FRANK DR , WEHMEIER GUIDO
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公开(公告)号：CH633031A5
公开(公告)日：1982-11-15
申请号：CH388278
申请日：1978-04-11
Applicant: HOECHST AG
Inventor： NOELTNER GERHARD , POHLMANN HEINRICH DR , RITTER EBERHARD DR , WAGNER DIETER DR
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公开(公告)号：DE59204414D1
公开(公告)日：1996-01-04
申请号：DE59204414
申请日：1992-08-19
Applicant: HOECHST AG
Inventor： RITTER EBERHARD DR , SCHAEFER HANS , VOLLHEIM THOMAS DR , SCHOTTLER MARTIN DR
IPC: C07C227/08 , C07C227/16 , C07C227/18 , C07C229/58 , C07C229/62
Abstract: The invention relates to a process for the preparation of dialkyl 2,5-di-(phenylamino)terephthalates of the formula (I) in which R denotes a hydrogen atom or a methyl group and R% denotes a methyl or ethyl group, by dehydrogenation (oxidation) of the corresponding dialkyl 2,5-di-(phenylamino)dihydro(3,6)terephthalate with oxygen, characterised in that a solution or suspension of the dialkyl 2,5-di-(phenylamino)dihydro(3,6)terephthalate in aromatic hydrocarbons is blanketed with oxygen in a stirring vessel, this reaction mixture is circulated through a spray device, so that the sprayed reaction mixture is dispersed above the reaction mixture present in the stirring vessel, the sprayed reaction mixture being mixed with the circulating gas. The process has the advantage of a short reaction time, combined with favourable space-time yields and simplicity in terms of apparatus.
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公开(公告)号：AT75726T
公开(公告)日：1992-05-15
申请号：AT89105009
申请日：1989-03-21
Applicant: HOECHST AG
Inventor： RITTER EBERHARD DR , KRIEG CLAUS-PETER DR , KEIL DETLEV DR
IPC: C07C249/00 , C07C249/12 , C07C251/34
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公开(公告)号：AT147371T
公开(公告)日：1997-01-15
申请号：AT92118516
申请日：1992-10-29
Applicant: HOECHST AG
Inventor： RITTER EBERHARD DR , WISSER THOMAS DR , RIEDEL ALFRED DR , GSCHEIDMEIER MANFRED DR , MAGINOT JOACHIM
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Patent Agency Ranking
公开(公告)号：DE58901307D1
公开(公告)日：1992-06-11
申请号：DE58901307
申请日：1989-03-21
Applicant: HOECHST AG
Inventor： RITTER EBERHARD DR , KRIEG CLAUS-PETER DR , KEIL DETLEV DR
IPC: C07C249/00 , C07C249/12 , C07C251/34
Abstract: Process for the preparation of 4-halo-3-oxo-2-alkoxyiminobutyric acid esters by solvent-free halogenation of the liquid substrate of a 3-oxo-2-alkoxyiminobutyric acid ester with elemental halogen.
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公开(公告)号：DE3809845A1
公开(公告)日：1989-10-12
申请号：DE3809845
申请日：1988-03-24
Applicant: HOECHST AG
Inventor： RITTER EBERHARD DR , KRIEG CLAUS-PETER DR , KEIL DETLEV DR
IPC: C07C249/00 , C07C249/12 , C07C251/34
Abstract: Process for the preparation of 4-halo-3-oxo-2-alkoxyiminobutyric acid esters by solvent-free halogenation of the liquid substrate of a 3-oxo-2-alkoxyiminobutyric acid ester with elemental halogen.
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公开(公告)号：ES2098415T3
公开(公告)日：1997-05-01
申请号：ES92118516
申请日：1992-10-29
Applicant: HOECHST AG
Inventor： RITTER EBERHARD DR , WISSER THOMAS DR , RIEDEL ALFRED DR , GSCHEIDMEIER MANFRED DR , MAGINOT JOACHIM
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公开(公告)号：ES2081533T3
公开(公告)日：1996-03-16
申请号：ES92114144
申请日：1992-08-19
Applicant: HOECHST AG
Inventor： RITTER EBERHARD DR , SCHAFER HANS , VOLLHEIM THOMAS DR , SCHOTTLER MARTIN DR
IPC: C07C227/08 , C07C227/16 , C07C227/18 , C07C229/58 , C07C229/62
Abstract: The invention relates to a process for the preparation of dialkyl 2,5-di-(phenylamino)terephthalates of the formula (I) in which R denotes a hydrogen atom or a methyl group and R% denotes a methyl or ethyl group, by dehydrogenation (oxidation) of the corresponding dialkyl 2,5-di-(phenylamino)dihydro(3,6)terephthalate with oxygen, characterised in that a solution or suspension of the dialkyl 2,5-di-(phenylamino)dihydro(3,6)terephthalate in aromatic hydrocarbons is blanketed with oxygen in a stirring vessel, this reaction mixture is circulated through a spray device, so that the sprayed reaction mixture is dispersed above the reaction mixture present in the stirring vessel, the sprayed reaction mixture being mixed with the circulating gas. The process has the advantage of a short reaction time, combined with favourable space-time yields and simplicity in terms of apparatus.
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公开(公告)号：DE2716478A1
公开(公告)日：1978-10-26
申请号：DE2716478
申请日：1977-04-14
Applicant: HOECHST AG
Inventor： NOELTNER GERHARD , POHLMANN HEINRICH DR , RITTER EBERHARD DR , WAGNER DIETER DR
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