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公开(公告)号：AT134157T
公开(公告)日：1996-02-15
申请号：AT94101520
申请日：1994-02-02
Applicant: DEGUSSA
Inventor： VON WEDEL WEDIGO DR , WECK MANFRED DR , TARABOCCHIA JOHN , SCHELBERT ULRICH , MOELLER ALEXANDER DR , EICKHOFF HUBERTUS
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.
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公开(公告)号：HU9501244D0
公开(公告)日：1995-06-28
申请号：HU9501244
申请日：1995-04-28
Applicant: DEGUSSA
Inventor： MOELLER ALEXANDER , SCHELBERT ULRICH , WECK MANFRED , EICKHOFF HUBERTUS
IPC: A62D3/38 , A62D101/22 , A62D101/28 , B09B3/00
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公开(公告)号：BR0309690B1
公开(公告)日：2015-01-06
申请号：BR0309690
申请日：2003-04-29
Applicant: UHDE GMBH , EVONIK DEGUSSA GMBH
Inventor： BERGES JOSE , EICKHOFF HUBERTUS , HAAS THOMAS , HOFEN WILLI , KAMPEIS PERCY , MOROFF GERALD , POHL WERNER , THIELE GEORG , WOLL WOLFGANG , BRASSE CLAUDIA , STOCHNIOL GUIDO , ULLRICH NORBERT
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.
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公开(公告)号：DE10248159A1
公开(公告)日：2004-04-29
申请号：DE10248159
申请日：2002-10-16
Applicant: DEGUSSA
Inventor： CREUTZ MATTHIAS , EICKHOFF HUBERTUS , MAURER BERNHARD
IPC: B01J8/22 , B01J23/44 , C01B15/023
Abstract: Continuous hydrogenation of a solution containing a compound capable of hydrogenation involves a heterogeneously catalyzed reaction using a hydrogen-containing gas with recycling of part of the H2-containing jet pump-compressed offgas to the reactor, the driving medium used in the jet pump being a liquid or gas component used in the reaction and the pressure of this medium being greater than the pressure at the entry of the compressed hydrogenation gas.
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公开(公告)号：FI113248B
公开(公告)日：2004-03-31
申请号：FI940777
申请日：1994-02-18
Applicant: DEGUSSA
Inventor： VON WEDEL WEDIGO , WECK MANFRED , TARABOCCHIA JOHN , SCHELBERT ULRICH , MOELLER ALEXANDER , EICKHOFF HUBERTUS
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.
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Patent Agency Ranking
公开(公告)号：AU2003229745A1
公开(公告)日：2003-11-17
申请号：AU2003229745
申请日：2003-04-29
Applicant: DEGUSSA
Inventor： ULLRICH NORBERT , WOELL WOLFGANG , BERGES JOSE , BRASSE CLAUDIA , EICKHOFF HUBERTUS , HAAS THOMAS , HOFEN WILLI , KAMPEIS PERCY , MOROFF GERALD , POHL WERNER , STOCHNIOL GUIDO , THIELE GEORG
IPC: C07B61/00 , C07D301/12 , 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.
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公开(公告)号：CA2483447A1
公开(公告)日：2003-11-13
申请号：CA2483447
申请日：2003-04-29
Inventor： MOROFF GERALD , POHL WERNER , ULLRICH NORBERT , THIELE GEORG , WOELL WOLFGANG , STOCHNIOL GUIDO , HAAS THOMAS , EICKHOFF HUBERTUS , HOFEN WILLI , KAMPEIS PERCY , BRASSE CLAUDIA , BERGES JOSE
IPC: C07B61/00 , C07D301/12 , 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.
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公开(公告)号：PT1123256E
公开(公告)日：2003-09-30
申请号：PT99969074
申请日：1999-08-28
Applicant: DEGUSSA
Inventor： EICKHOFF HUBERTUS , RUDIGER SCHUTTE DR
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.
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公开(公告)号：PT1123255E
公开(公告)日：2003-03-31
申请号：PT99947292
申请日：1999-09-09
Applicant: DEGUSSA
Inventor： RUDIGER SCHUTTE DR , EICKHOFF HUBERTUS
IPC: B01J8/18 , B01J8/22 , B01J8/34 , B01J8/44 , B01J10/00 , B01J19/00 , B01J19/24 , B01J19/32 , C01B15/023 , B44C1/17
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.
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公开(公告)号：DE59903356D1
公开(公告)日：2002-12-12
申请号：DE59903356
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.
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