公开(公告)号：CA2809323C

公开(公告)日：2017-05-16

申请号：CA2809323

申请日：2011-07-29

Applicant: EVONIK DEGUSSA GMBH

Inventor： EICKHOFF HUBERTUS ,  LODE FLORIAN ,  AREVALO EDUARDO ,  BRENDEL MARC ,  WALLERT CLAUDIA

IPC: C01B15/013 ,  B01D3/00

Abstract: In a process for concentrating aqueous hydrogen peroxide solution to give two hydrogen peroxide streams of different concentration in an apparatus comprising a preevaporator (1), a distillation column (2) and a vapour compressor (3), in which the aqueous hydrogen peroxide solution to be concentrated (4) is continuously fed into the preevaporator, vapour (5) produced by evaporation in the preevaporator is fed to the distillation column, bottom product (6) obtained in the preevaporator is withdrawn as a first concentrated hydrogen peroxide stream (7), vapour (8) produced in the distillation column is withdrawn from the distillation column at the top of the column, compressed by means of the vapour compressor and used for heating the preevaporator and the bottom product (9) obtained in the distillation column is withdrawn as a second concentrated hydrogen peroxide stream (10), two concentrated hydrogen peroxide solutions having differing concentrations in the range from 50 to 70% by weight of hydrogen peroxide can be produced at the same time in a freely selectable ratio by feeding part of the bottom product obtained in the preevaporator in liquid form to the distillation column.

公开(公告)号：DE60304169T3

公开(公告)日：2015-01-08

申请号：DE60304169

申请日：2003-04-29

Applicant: EVONIK DEGUSSA GMBH ,  UHDE GMBH

Inventor： BERGES JOSE ,  BRASSE CLAUDIA ,  EICKHOFF HUBERTUS ,  HAAS THOMAS ,  HOFEN WILLI ,  KAMPEIS PERCY ,  MOROFF GERALD ,  POHL WERNER ,  STOCHNIOL GUIDO ,  ULLRICH NORBERT ,  WOELL WOLFGANG ,  THIELE GEORG

IPC: C07D301/12 ,  C07B61/00 ,  C07D303/04

公开(公告)号：PL213135B1

公开(公告)日：2013-01-31

申请号：PL37150303

申请日：2003-04-29

Applicant: DEGUSSA ,  UHDE GMBH

Inventor： BERGES JOSE ,  BRASSE CLAUDIA ,  EICKHOFF HUBERTUS ,  HAAS THOMAS ,  HOFEN WILLI ,  KAMPEIS PERCY ,  MOROFF GERALD ,  POHL WERNER ,  STOCHNIOL GUIDO ,  THIELE GEORG ,  ULLRICH NORBERT ,  WOELL WOLFGANG

IPC: C07B41/04 ,  C07B61/00 ,  C07D301/12 ,  C07D303/04

公开(公告)号：CA2483447C

公开(公告)日：2011-08-09

申请号：CA2483447

申请日：2003-04-29

Applicant: DEGUSSA ,  UHDE GMBH

Inventor： BERGES JOSE ,  BRASSE CLAUDIA ,  EICKHOFF HUBERTUS ,  HAAS THOMAS ,  HOFEN WILLI ,  KAMPEIS PERCY ,  MOROFF GERALD ,  POHL WERNER ,  STOCHNIOL GUIDO ,  THIELE GEORG ,  ULLRICH NORBERT ,  WOELL WOLFGANG

IPC: C07D301/12 ,  C07B61/00 ,  C07D303/04

Abstract: The present invention relates to a process for the epoxidation of olefins by i) reacting an olefin with hydrogen peroxide in presence of an epoxidation catalyst and an alcoholic solvent; ii) separating product olefin oxide and unreacted olefin from the reaction product of step i); iii) recovering a stream comprising the alcoholic solvent,characterized by iv) subjecting the recovered stream of step iii) to hydrogenation.

公开(公告)号：AU767574B2

公开(公告)日：2003-11-20

申请号：AU5971799

申请日：1999-08-28

Applicant: DEGUSSA

Inventor： SCHUTTE RUDIGER ,  EICKHOFF HUBERTUS

IPC: B01J8/02 ,  B01J8/34 ,  B01J10/00 ,  B01J19/24 ,  B01J19/32 ,  C01B15/023

Abstract: The invention relates to a process for carrying out gas-liquid reactions in a continuous flow reactor having several reactor chambers arranged parallel to one another, open in the direction of flow. The space-time yield can be increased in that a reactor is used with at least three chambers, the ratio of chamber width b to slit width s of which is, on average, greater than 3 and the slit width s of which is in the range of 5 to 100 mm. Preferably, s is in the range of 5 to 50 mm and s/b in the range of 5 to 100. The continuous flow reactor according to the invention with the at least three reactor chambers and the above ratio s/b is preferably tubular and contains one or more plate stacks.

公开(公告)号：ES2192883T3

公开(公告)日：2003-10-16

申请号：ES99969074

申请日：1999-08-28

Applicant: DEGUSSA

Inventor： SCHUTTE RUDIGER ,  EICKHOFF HUBERTUS

IPC: B01J8/02 ,  B01J8/34 ,  B01J10/00 ,  B01J19/24 ,  B01J19/32 ,  C01B15/023

Abstract: The invention relates to a process for carrying out gas-liquid reactions in a continuous flow reactor having several reactor chambers arranged parallel to one another, open in the direction of flow. The space-time yield can be increased in that a reactor is used with at least three chambers, the ratio of chamber width b to slit width s of which is, on average, greater than 3 and the slit width s of which is in the range of 5 to 100 mm. Preferably, s is in the range of 5 to 50 mm and s/b in the range of 5 to 100. The continuous flow reactor according to the invention with the at least three reactor chambers and the above ratio s/b is preferably tubular and contains one or more plate stacks.

公开(公告)号：AT238967T

公开(公告)日：2003-05-15

申请号：AT99969074

申请日：1999-08-28

Applicant: DEGUSSA

Inventor： SCHUETTE RUEDIGER ,  EICKHOFF HUBERTUS

IPC: B01J8/02 ,  B01J8/34 ,  B01J10/00 ,  B01J19/24 ,  B01J19/32 ,  C01B15/023

Abstract: The invention relates to a process for carrying out gas-liquid reactions in a continuous flow reactor having several reactor chambers arranged parallel to one another, open in the direction of flow. The space-time yield can be increased in that a reactor is used with at least three chambers, the ratio of chamber width b to slit width s of which is, on average, greater than 3 and the slit width s of which is in the range of 5 to 100 mm. Preferably, s is in the range of 5 to 50 mm and s/b in the range of 5 to 100. The continuous flow reactor according to the invention with the at least three reactor chambers and the above ratio s/b is preferably tubular and contains one or more plate stacks.

公开(公告)号：AT227245T

公开(公告)日：2002-11-15

申请号：AT99947292

申请日：1999-09-09

Applicant: DEGUSSA

Inventor： EICKHOFF HUBERTUS ,  SCHUETTE RUEDIGER

IPC: B01J8/18 ,  B01J8/22 ,  B01J8/34 ,  B01J8/44 ,  B01J10/00 ,  B01J19/00 ,  B01J19/24 ,  B01J19/32 ,  C01B15/023

Abstract: A bubble column can be operated using countercurrent flow including perforated trays. The space-time yield of gas-liquid reactions can be considerably increased if the perforated trays have a substantially uniform distribution of holes, if the cross-sectional area of the individual holes is 0.003 to 3 mm2, particularly 0.01 to 0.5 mm2, and if the open area of the trays is 3 to 20%, particularly 3 to 10%, and if the bubble column comprises passages for liquid between adjacent liquid zones.The bubble column can be used for carrying out gas-liquid reactions, such as oxidation reactions with air, with the gas and liquid preferably being passed in countercurrent flow through the column. Cocurrent flow may also be used.

公开(公告)号：TR200100850T2

公开(公告)日：2001-08-21

申请号：TR200100850

申请日：1999-09-09

Applicant: DEGUSSA

Inventor： EICKHOFF HUBERTUS ,  SCHUETTE RUEDIGER

IPC: B01J8/18 ,  B01J8/22 ,  B01J8/34 ,  B01J8/44 ,  B01J10/00 ,  B01J19/00 ,  B01J19/24 ,  B01J19/32 ,  C01B15/023

Abstract: A bubble column can be operated using countercurrent flow including perforated trays. The space-time yield of gas-liquid reactions can be considerably increased if the perforated trays have a substantially uniform distribution of holes, if the cross-sectional area of the individual holes is 0.003 to 3 mm2, particularly 0.01 to 0.5 mm2, and if the open area of the trays is 3 to 20%, particularly 3 to 10%, and if the bubble column comprises passages for liquid between adjacent liquid zones.The bubble column can be used for carrying out gas-liquid reactions, such as oxidation reactions with air, with the gas and liquid preferably being passed in countercurrent flow through the column. Cocurrent flow may also be used.

公开(公告)号：DE4305344C2

公开(公告)日：1996-11-21

申请号：DE4305344

申请日：1993-02-20

Applicant: DEGUSSA

Inventor： WEDEL WEDIGO VON DR ,  WECK MANFRED DR ,  TARABOCCHIA JOHN ,  SCHELBERT ULRICH ,  MOELLER ALEXANDER DR ,  EICKHOFF HUBERTUS

IPC: B01D53/34 ,  B01D53/70 ,  B01D53/86

Abstract: The invention relates to a process for the degradation of highly toxic halogenated compounds contained in SO2-free gases, in particular polychlorinated dibenzodioxins (PCDD) and dibenzofurans (PCDF) by oxidation with the use of hydrogen peroxide. The degradation of PCDDs and PCDFs by treating the gases with hydrogen peroxide under UV irradiation is known. According to the invention, the gas, in the presence of hydrogen peroxide, is passed over an essentially inorganic solid catalyst, in particular pyrogenic or precipitated silica or aluminium silicate. A residual PCDD/PCDF content of below 0.1 ng of dry matter/m (STP) can be achieved in the treated gas; the highly toxic compounds are oxidatively decomposed on the solid catalyst.