Patents by Inventor Andreas Bulan

Andreas Bulan 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).

  • Patent number: 10711356
    Abstract: The invention relates to an oxygen-consuming electrode, in particular for use in chloralkali electrolysis, comprising a novel catalyst coating based on carbon nanotubes and a silver-based cocatalyst, and to an electrolysis device. The invention further relates to a method for producing said oxygen-consuming electrode and to the use thereof in chloralkali electrolysis or fuel cell technology.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: July 14, 2020
    Assignee: Covestro Deutschland AG
    Inventors: Andreas Bulan, Jürgen Kintrup
  • Publication number: 20200141540
    Abstract: The invention relates to a method for the leakage-proof storage of liquefied chlorine under increased pressure in pressure tanks, in which up to 20 wt. % polyvinyl chloride (PVC) or chlorinated polyvinyl chloride (cPVC) is placed in the pressure tank prior to filling the pressure tank with liquefied chlorine.
    Type: Application
    Filed: July 16, 2018
    Publication date: May 7, 2020
    Applicant: Covestro Deutschland AG
    Inventors: Andreas BULAN, Rainer WEBER, Jürgen KINTRUP, Daniel Gordon DUFF, Verena HAVERKAMP, Giulio LOLLI, Jose FONSECA, Stefanie EIDEN, Thomas KÖNIG
  • Patent number: 10640399
    Abstract: Described is an osmotic distillation process for concentrating a liquid containing sodium chloride, and in particular a treatment process for used reaction water containing sodium chloride from the production of polymers.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: May 5, 2020
    Assignee: Covestro Deutschland AG
    Inventors: Andreas Bulan, Yuliya Schießer, Rainer Weber
  • Publication number: 20190375635
    Abstract: The invention relates to a method for flexibly controlling the use of hydrochloric acid having an HCl concentration of at least 10 wt %, in particular at a volume flow rate of at least 1 m3/h, obtained from a continuous chemical production process (A). In the method, purified hydrochloric acid (54) from a hydrochloric acid store (E) is optionally fed to a dispatch station (H), an HCl electrolysis station (F) and a chloralkali electrolysis station (L), which are consumption points for the hydrochloric acid, or to a neutralisation station (G) in that if one or more of said consumption points (H, F, L) is not available or if there are bottlenecks at the consumption points (H, F, L), the hydrochloric acid (54) is fed to the neutralisation station (G) and neutralised with concentrated alkali solution (55), in particular with concentrated sodium hydroxide solution, and the resulting salt solution (56) is fed either to the chloralkali process station (L) or to a disposal station (M).
    Type: Application
    Filed: January 17, 2018
    Publication date: December 12, 2019
    Inventors: Andreas Bulan, Johann RECHNER, Rainer WEBER, Juergen HECKE, Wolfgang KERN, Martin LEIPNITZ, Bemd HENNING
  • Publication number: 20190177186
    Abstract: The invention relates to a method for the electrochemical purification of chloride-containing, aqueous process solutions, which are contaminated with organic chemical compounds, using a boron-doped diamond electrode at a pH value of at least 9.5.
    Type: Application
    Filed: August 8, 2017
    Publication date: June 13, 2019
    Inventors: Andreas BULAN, Rainer WEBER, Thorben MUDDEMANN
  • Publication number: 20190112719
    Abstract: The invention relates to an oxygen-consuming electrode for use in chlor-alkali electrolysis which, as required, can either evolve hydrogen or can also consume oxygen, on the basis of a silver-based catalyst and an additional electrocatalyst based on ruthenium and/or iridium. The invention further relates to an electrolysis device consisting thereof. When said electrode is used in the chlor-alkali electrolysis, a correspondingly equipped chlor-alkali electrolysis system can be used for example for network stabilization of power supply networks.
    Type: Application
    Filed: April 4, 2017
    Publication date: April 18, 2019
    Inventors: Andreas BULAN, Rainer WEBER, Fabian BIENEN
  • Patent number: 10224552
    Abstract: The present invention relates to a gas diffusion electrode that includes an electrically conductive carrier, and a porous coating based on an electrochemically active catalyst and a hydrophobic material, wherein the electrode has a first side facing an oxygen-containing gas and a second side facing an alkaline electrolyte, wherein the catalyst comprises a noble metal as a catalytically active component, wherein the hydrophobic material comprises a hydrophobic polymer, and wherein the coating comprising the catalyst has a pore volume from 10 to 500 mm3/g, and a pore diameter in the range from 100 to 10,000 nm.
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: March 5, 2019
    Assignee: Covestro AG
    Inventors: Andreas Bulan, Jürgen Kintrup, Rainer Weber
  • Patent number: 10202700
    Abstract: An oxygen-consuming electrode, in particular for use in chloralkali electrolysis, having a novel catalyst coating and also an electrolysis apparatus are described. Furthermore, its use in chloralkali electrolysis, fuel cell technology or metal/air batteries is described. The oxygen-consuming electrode comprises at least a support which in particular is electrically conductive, a layer containing a catalyst and a hydrophobic layer, characterized in that it contains gallium in addition to silver as catalytically active component.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: February 12, 2019
    Assignee: Covestro Deutschland AG
    Inventors: Andreas Bulan, Norbert Wagner, Gregor Polcyn, Lisa Rossrucker, Michael Marx
  • Publication number: 20180186665
    Abstract: Described is an osmotic distillation process for concentrating a liquid containing sodium chloride, and in particular a treatment process for used reaction water containing sodium chloride from the production of polymers.
    Type: Application
    Filed: June 29, 2016
    Publication date: July 5, 2018
    Inventors: Andreas BULAN, Yuliya SCHIEßER, Rainer WEBER
  • Publication number: 20170298524
    Abstract: The invention relates to an oxygen-consuming electrode, in particular for use in chloralkali electrolysis, comprising a novel catalyst coating based on carbon nanotubes and a silver-based cocatalyst, and to an electrolysis device. The invention further relates to a method for producing said oxygen-consuming electrode and to the use thereof in chloralkali electrolysis or fuel cell technology.
    Type: Application
    Filed: August 28, 2015
    Publication date: October 19, 2017
    Applicant: Covestro Deutschland AG
    Inventors: Andreas BULAN, Jürgen KINTRUP
  • Publication number: 20170283964
    Abstract: The invention relates to an oxygen-consuming electrode, in particular for use in chloralkali electrolysis, comprising a catalyst coating based on carbon nanotubes, and to an electrolysis device. The invention further relates to a method for producing said oxygen-consuming electrode and to the use thereof in chloralkali electrolysis or fuel cell technology.
    Type: Application
    Filed: August 28, 2015
    Publication date: October 5, 2017
    Inventors: Andreas BULAN, Jürgen KINTRUP
  • Patent number: 9714472
    Abstract: A gas diffusion electrode is described, especially for use in chloralkali electrolysis, said gas diffusion electrode having finely divided components on the liquid side. The electrode is notable for a low perviosity to gases and a lower operating voltage.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: July 25, 2017
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Andreas Bulan, Jürgen Kintrup, Norbert Schmitz, Alexander Karpenko, Jens Aβmann
  • Patent number: 9677183
    Abstract: Electrocatalyst, electrode coating and an electrode for preparing chlorine and process for producing the electrode, the electrocatalyst comprising a noble metal oxide and/or a noble metal of transition groups VIIIa of the Periodic Table of the Elements and at least one finely divided pulverulent oxide of another metal, in which one or more components are doped and the base metal oxide powder is chemically stable in the presence of aqueous electrolytes.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: June 13, 2017
    Assignee: Covestro Deutschland AG
    Inventors: Juergen Kintrup, Andreas Bulan, Elin Hammarberg, Stefan Sepeur, Gerald Frenzer, Frank Gross, Stefanie Eiden
  • Publication number: 20170088961
    Abstract: Method for the gastight and liquid-tight installation of oxygen consuming electrodes in an electrolysis apparatus, and electrolysis apparatus for use in chloralkali electrolysis, in which particular regions are covered with an additional film having a composition comparable to the oxygen-consuming electrodes.
    Type: Application
    Filed: December 13, 2016
    Publication date: March 30, 2017
    Inventors: Andreas BULAN, Michael GROßHOLZ, Randolf KIEFER, Peter WOLTERING
  • Publication number: 20170067172
    Abstract: A process for wet-chemical production of a catalyst coating on an electrically conductive support for electrodes for chloralkali or hydrochloric acid electrolysis with electro catalytically active components based on noble metal oxides, in which the catalyst coating is produced by; producing a coating solution or dispersion comprising a precursor compound of a noble metal and/or a metal oxide of a noble metal, and a solvent or dispersant, with addition of one or more acids to the coating solution or dispersion, where the molar ratio of the total of the amounts of acid (in mol) present in the coating solution or dispersion to the sum of the amounts of the metals from the metal-containing components present in the coating solution or dispersion is at least 2:1; applying the coating solution or dispersion to the support; substantially freeing the layer applied of solvent or dispersant by drying; and subjecting the dried layer obtained to a thermal treatment to form the catalyst coating.
    Type: Application
    Filed: November 18, 2016
    Publication date: March 9, 2017
    Inventors: Juergen Kintrup, Andreas BULAN, Elin HAMMARBERG, Stefan SEPEUR, Gerald FRENZER, Frank GROSS
  • Patent number: 9562294
    Abstract: The invention relates to an electrochemical cell comprising an anode and a cathode compartments separated by a membrane, having corresponding electrodes; said anode and cathode compartments each having an external wall, flanged areas designed like frames in the contact area of the compartments, and a gas diffusion electrode comprising a liquid-permeable carrier coated with a catalyst material; said gas diffusion electrode featuring an area not coated with catalyst at its bottom edge, said area, at the bottom end of the electrochemical cell, protruding between the flanged areas of the external wall of the cathode compartment and the flanged areas of the external wall of the anode compartment in the contact area of the compartments; a porous material arranged parallel between the gas diffusion electrode and the membrane, and devices for the supply and discharge of gas and electrolyte, with a gas space separated from an electrolyte space by appropriate means.
    Type: Grant
    Filed: April 7, 2012
    Date of Patent: February 7, 2017
    Assignee: UHDENORA S.P.A.
    Inventors: Peter Woltering, Randolf Kiefer, Rainer Weber, Andreas Bulan
  • Publication number: 20170016129
    Abstract: The invention relates to an electrochemical method for producing catalytically active powder from mixtures of metallic silver, optionally with silver oxides, which are particularly suitable for use in oxygen-consuming electrodes, in particular for use in chlor-alkali electrolysis. The invention also relates to the use of said electrodes in chlor-alkali electrolysis or fuel cell technology or in metal/air batteries.
    Type: Application
    Filed: March 6, 2015
    Publication date: January 19, 2017
    Inventors: Andreas Bulan, Rainer WEBER, Michael STELTER, Hartmund BOMBACH, Katja PALM
  • Patent number: 9476131
    Abstract: The invention relates to an electrochemical cell comprising an anode and a cathode compartment separated by a membrane, housing corresponding electrodes. The anode and the cathode compartments having external walls with frame-type flanged areas in the contact area of both compartments. The flanged areas having mounting bores marking an inner area and an outer area of the electrochemical cell a, gas-diffusion electrode resting on a support system, a porous material resting on the gas-diffusion electrode, and devices for the inlet and outlet of gas and electrolyte. At least one circumferential gasket frame is in the contact area of both compartments, between the frame-type flanged areas of the external walls of both compartments, said gasket resting on the membrane, with the porous material and the gas-diffusion electrode resting on the frame-type cathodic flanged area and the circumferential gasket frame overlapping in this area with the porous material and the gas-diffusion electrode.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: October 25, 2016
    Assignee: UHDENORA S.P.A.
    Inventors: Randolf Kiefer, Peter Woltering, Rainer Weber, Andreas Bulan, Michael Grossholz
  • Patent number: 9447510
    Abstract: Processes for the production of chlorine by multi-stage oxidation, for example, by thermal reaction of hydrogen chloride with oxygen using catalysts or by non-thermal activated reaction of hydrogen chloride with oxygen, in which the gas mixture formed in the reaction, comprising the target products chlorine and water, unreacted hydrogen chloride and oxygen, and possibly other secondary constituents, such as carbon dioxide and nitrogen, (a) is cooled to condense hydrochloric acid as an aqueous solution of hydrogen chloride and (b) the aqueous solution of hydrogen chloride formed is separated from the gas mixture, characterised in that (c) the separated aqueous solution of hydrogen chloride is fed at least partially to an electrochemical oxidation in which at least part of the hydrogen chloride is oxidised to chlorine, (d) the chlorine gas occurring in step d) is optionally added to the gas mixture occurring in step c), (e) the residues of water present in the gas mixture from steps c) and e), in particular by
    Type: Grant
    Filed: May 17, 2007
    Date of Patent: September 20, 2016
    Assignee: Covestro Deutschland AG
    Inventors: Rainer Weber, Jürgen Kintrup, Andreas Bulan, Friedhelm Kämper
  • Patent number: 9422631
    Abstract: The present invention relates to a method of operating an oxygen-consuming electrode as cathode for the electrolysis of alkali metal chlorides or hydrochloric acid, in an electrochemical cell, comprising feeding an oxygen-containing process gas to the electrode, wherein the oxygen-containing process gas is at least partly heated using a heat source from the electrolysis before contact with the oxygen-consuming electrode to a temperature which corresponds to not more than the temperature of the cathode space in the cell or is less than 50° C. below the temperature of the cathode space in the cell.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: August 23, 2016
    Assignee: Covestro Deutschland AG
    Inventors: Andreas Bulan, Michael Groβholz