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.

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.

公开(公告)号：DK0444596T3

公开(公告)日：1994-03-07

申请号：DK91102803

申请日：1991-02-26

Applicant: HOECHST AG

Inventor： KLEIN HEINZ-DIETER ,  MEISSNER PETRA ,  OCHS NORBERT ,  SCHOTTLER MARTIN DR ,  SIEVERT WOLFGANG DR

IPC: B67D7/02 ,  B67C9/00 ,  B67D7/34 ,  B67D5/02

Abstract: The connector plate (4) affixed by a screwed cap to a container for high-purity liq. has two . spaced tubular extensions (5,6) towards the container interior, with an intermediate smaller dia. bore (7). The three bores (5,6,7) extend upwards through a clamped-on head plate (9) integral with an upper valve body (23) incorporating at least two valve heads (2,3) of membrane type and entered by bores (10,11) aligned with the liq-facing extensions, with the smaller dia. bore passing completely through the valve body. The bores (10,11) end on tubular connectors (29,30) and are also joined by conduits (31,32,33,34) inside the valve body and interrupted by the valve heads. Further conduits (13,14) in the valve body are joined by additional valve heads to the liq. conduit system (33,34).

公开(公告)号：ES2048515T3

公开(公告)日：1994-03-16

申请号：ES91102803

申请日：1991-02-26

Applicant: HOECHST AG

Inventor： KLEIN HEINZ-DIETER ,  MEISSNER PETRA ,  OCHS NORBERT ,  SCHOTTLER MARTIN DR ,  SIEVERT WOLFGANG DR

IPC: B67D7/02 ,  B67C9/00 ,  B67D7/34 ,  B67D5/02

Abstract: The connector plate (4) affixed by a screwed cap to a container for high-purity liq. has two . spaced tubular extensions (5,6) towards the container interior, with an intermediate smaller dia. bore (7). The three bores (5,6,7) extend upwards through a clamped-on head plate (9) integral with an upper valve body (23) incorporating at least two valve heads (2,3) of membrane type and entered by bores (10,11) aligned with the liq-facing extensions, with the smaller dia. bore passing completely through the valve body. The bores (10,11) end on tubular connectors (29,30) and are also joined by conduits (31,32,33,34) inside the valve body and interrupted by the valve heads. Further conduits (13,14) in the valve body are joined by additional valve heads to the liq. conduit system (33,34).

公开(公告)号：DE59100619D1

公开(公告)日：1994-01-05

申请号：DE59100619

申请日：1991-02-26

Applicant: HOECHST AG

Inventor： KLEIN HEINZ-DIETER ,  MEISSNER PETRA ,  OCHS NORBERT ,  SCHOTTLER MARTIN DR ,  SIEVERT WOLFGANG DR

IPC: B67C9/00 ,  B67D7/02 ,  B67D7/34 ,  B67D5/02

Abstract: The connector plate (4) affixed by a screwed cap to a container for high-purity liq. has two . spaced tubular extensions (5,6) towards the container interior, with an intermediate smaller dia. bore (7). The three bores (5,6,7) extend upwards through a clamped-on head plate (9) integral with an upper valve body (23) incorporating at least two valve heads (2,3) of membrane type and entered by bores (10,11) aligned with the liq-facing extensions, with the smaller dia. bore passing completely through the valve body. The bores (10,11) end on tubular connectors (29,30) and are also joined by conduits (31,32,33,34) inside the valve body and interrupted by the valve heads. Further conduits (13,14) in the valve body are joined by additional valve heads to the liq. conduit system (33,34).

公开(公告)号：DE4006490A1

公开(公告)日：1991-09-05

申请号：DE4006490

申请日：1990-03-02

Applicant: HOECHST AG

Inventor： KLEIN HEINZ-DIETER DIPL ING ,  MEISSNER PETRA DIPL ING ,  OCHS NORBERT DIPL ING ,  SCHOTTLER MARTIN DR

IPC: B67C9/00 ,  B67D7/02 ,  B67D7/34

Abstract: The connector plate (4) affixed by a screwed cap to a container for high-purity liq. has two . spaced tubular extensions (5,6) towards the container interior, with an intermediate smaller dia. bore (7). The three bores (5,6,7) extend upwards through a clamped-on head plate (9) integral with an upper valve body (23) incorporating at least two valve heads (2,3) of membrane type and entered by bores (10,11) aligned with the liq-facing extensions, with the smaller dia. bore passing completely through the valve body. The bores (10,11) end on tubular connectors (29,30) and are also joined by conduits (31,32,33,34) inside the valve body and interrupted by the valve heads. Further conduits (13,14) in the valve body are joined by additional valve heads to the liq. conduit system (33,34).