Patents by Inventor Hubertus Eickhoff
Hubertus Eickhoff has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9206047Abstract: The invention is directed to a process for concentrating aqueous hydrogen peroxide solution to give at least two hydrogen peroxide streams of different concentration in an apparatus which includes a preevaporator (1), a distillation column (2) and a vapour compressor (3).Type: GrantFiled: July 29, 2011Date of Patent: December 8, 2015Assignee: Evonik Degussa GmbHInventors: Hubertus Eickhoff, Florian Lode, Eduardo Arevalo, Marc Brendel, Claudia Wallert
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Publication number: 20130146438Abstract: 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evaporation in the preevaporator is fed to the distillation column, bottom product (6) obtained in the preevaporator is withdrawn as a first concentrated hydrogen peroxide stream (7), vapour (8) produced in the distillation column is withdrawn from the distillation column at the top of the column, compressed by means of the vapour compressor and used for heating the preevaporator and the bottom product (9) obtained in the distillation column is withdrawn as a second concentrated hydrogen peroxide stream (10), two concentrated hydrogen peroxide solutions having differing concentrations in the range from 50 to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 cType: ApplicationFiled: July 29, 2011Publication date: June 13, 2013Applicant: Evonik Degussa GmbHInventors: Hubertus Eickhoff, Florian Lode, Eduardo Arevalo, Marc Brendel, Claudia Wallert
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Patent number: 7141683Abstract: A process for the epoxidation of olefins which includes 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; and iv) subjecting the recovered stream of step iii) to hydrogenation.Type: GrantFiled: May 2, 2003Date of Patent: November 28, 2006Assignees: Degussa AG, Uhde GmbHInventors: Thomas Haas, Georg Thiele, Gerald Moroff, Norbert Ullrich, Willi Hofen, Guido Stochniol, Hubertus Eickhoff, Werner Pohl, Wolfgang Wöll, Claudia Brasse, José Berges, Percy Kampeis
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Patent number: 7056485Abstract: The invention is directed to a continuous hydrogenation process in which a hydrogenable compound is dissolved in a working solution with hydrogen and a heterogeneous catalyst. At least part of the hydrogen-containing waste hydrogenation gas generated in the reaction is compressed and then recycled into the hydrogenation reactor. A jet pump is used for the compression of the waste hydrogenation gas and a liquid or gaseous feedstock of the hydrogenation process is used as the motive agent. Preferred motive agents are the hydrogenation gas or a working solution recycled into the process. The process is particularly suitable for performing the hydrogenation step in the anthraquinone process for the production of hydrogen peroxide.Type: GrantFiled: October 14, 2003Date of Patent: June 6, 2006Assignee: Degussa AGInventors: Matthias Creutz, Hubertus Eickhoff, Bernhard Maurer
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Publication number: 20040136897Abstract: The invention is directed to a continuous hydrogenation process in which a hydrogenable compound is dissolved in a working solution with hydrogen and a heterogeneous catalyst. At least part of the hydrogen-containing waste hydrogenation gas generated in the reaction is compressed and then recycled into the hydrogenation reactor. A jet pump is used for the compression of the waste hydrogenation gas and a liquid or gaseous feedstock of the hydrogenation process is used as the motive agent. Preferred motive agents are the hydrogenation gas or a working solution recycled into the process. The process is particularly suitable for performing the hydrogenation step in the anthraquinone process for the production of hydrogen peroxide.Type: ApplicationFiled: October 14, 2003Publication date: July 15, 2004Inventors: Matthias Creutz, Hubertus Eickhoff, Bernhard Maurer
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Publication number: 20040006239Abstract: A process for the epoxidation of olefins which includesType: ApplicationFiled: May 2, 2003Publication date: January 8, 2004Inventors: Thomas Haas, Georg Thiele, Gerald Moroff, Norbert Ullrich, Willi Hofen, Guido Stochniol, Hubertus Eickhoff, Werner Pohl, Wolfgang Woll, Claudia Brasse, Jose Berges, Percy Kampeis
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Patent number: 6419892Abstract: 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.Type: GrantFiled: September 13, 1999Date of Patent: July 16, 2002Assignee: Degussa-Huls AGInventors: Rudiger Schutte, Hubertus Eickhoff
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Patent number: 6375921Abstract: 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.Type: GrantFiled: May 23, 2000Date of Patent: April 23, 2002Assignee: Degussa Huls A.G.Inventors: Hubertus Eickhoff, Rüdiger Schütte
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Patent number: 5463170Abstract: Disclosed is a process for the degradation of highly toxic halogenated organic compounds, in particular polychlorinated dibenzodioxins (PCDD) and dibenzofurans (PCDF), contained in gases containing no SO.sub.2 by oxidation using preferably hydrogen peroxide. The SO.sub.2 -free gas is passed, in the presence of hydrogen peroxide, over a substantially inorganic solid contact catalyst, in particular pyrogenic or precipitated silica or aluminum silicate. A residual PCDD/PCDF content of below 0.1 ng TE/Nm.sup.3 may be achieved in the thus treated gas; the highly toxic compounds are oxidized on the solid contact catalyst.Type: GrantFiled: February 18, 1994Date of Patent: October 31, 1995Assignee: Degussa AktiengesellschaftInventors: Wedigo von Wedel, Hubertus Eickhoff, Manfred Weck, John Tarabocchia, Ulrich Schelbert, Alexander Moller
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Patent number: 5366711Abstract: A process is described for the removal of nitrogen oxides from waste gases with the recovery of nitric acid or a nitrate solution. The waste gas is reacted with hydrogen peroxide in an amount appropriate to the desired degree of removal of nitrogen oxides, on a catalyst, at a temperature of less than 800.degree. C., preferably in the range of 20.degree. to 100.degree. C., to give the valuable product, nitric acid or a nitrate solution. This may be done in accordance with the invention by bringing the hydrogen peroxide as a solution, i.e., in the liquid phase, into contact with the catalyst through which the waste gas is flowing. The reaction product is either utilized in a gaseous form or processed to nitric acid or a nitrate solution. Alternatively, the hydrogen peroxide may be introduced in a gaseous form, using a honeycombed catalyst, and wherein the hydrogen peroxide is present in at least one half of the stoichiometrically determined amount.Type: GrantFiled: October 30, 1992Date of Patent: November 22, 1994Assignee: Degussa AktiengesellschaftInventors: Wegido von Wedel, Ernst-Robert Barenschee, Hubertus Eickhoff