Patents by Inventor Doris Neumann

Doris Neumann 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).

  • Phenazine-based compounds
    Patent number: 12655111
    Abstract: The present invention relates to novel phenazine-based compounds and compositions comprising the same and their use as redox flow battery electrolytes.
    Type: Grant
    Filed: February 22, 2021
    Date of Patent: June 16, 2026
    Assignee: CMBlu Energy AG
    Inventors: Peter Geigle, Jan Hartwig, Eduard Baal, Isabel Scheibel, Evgeny Larionov, Olga Ekkert, Doris Neumann, Christian Schneider
  • Process For The Manufacture Of A Potassium Salt Of A Benzoquinone
    Publication number: 20240270672
    Abstract: The present invention relates to the manufacture of benzoquinones, in particular to the manufacture of a potassium salt of a benzoquinone, such as 2,5-dihydroxy-1,4-benzoquinone di-potassium salt. The potassium salt of a benzoquinone is obtained by oxidation of a hydroquinone using potassium hydroxide and hydrogen peroxide, which results in an efficient process with high yields.
    Type: Application
    Filed: May 6, 2021
    Publication date: August 15, 2024
    Inventors: Peter GEIGLE, Doris NEUMANN, Christian SCHNEIDER, Markus Richard HARTMANN, Silke SCHLEICH, Cesare SAVARINO
  • Aqueous Energy Storage System For Redox Flow Batteries
    Publication number: 20240222674
    Abstract: The present invention relates to an aqueous energy storage system, comprising a half-cell containing an aqueous solution of at least two redox-active compounds (RACs) and one or more insoluble preferably organic energy storage material(s). Moreover, the use of such a half-cell as negative electrode in redox-flow battery application is described.
    Type: Application
    Filed: December 24, 2021
    Publication date: July 4, 2024
    Inventors: Peter GEIGLE, Nils WEDLER, Evgeny LARIONOV, Eduard BAAL, Nis-Julian KNEUSELS, Christian SCHNEIDER, Olga EKKERT, Markus Richard HARTMANN, Doris NEUMANN, Michael UN-KRIG-BAU
  • Novel Phenazine-Based Compounds
    Publication number: 20230095542
    Abstract: The present invention relates to novel phenazine-based compounds and compositions comprising the same and their use as redox flow battery electrolytes.
    Type: Application
    Filed: February 22, 2021
    Publication date: March 30, 2023
    Inventors: Peter Geigle, Jan Hartwig, Eduard Baal, Isabel Scheibel, Evgeny Larionov, Olga Ekkert, Doris Neumann, Christian Schneider
  • Electrolyte Compositions Comprising Distinct Redox-Active Species and Uses Thereof
    Publication number: 20230097730
    Abstract: The present invention relates to electrolyte compositions comprising distinct redox-active compounds, namely, a redox-active compound, which is phenazine or a phenazine derivative, and a distinct redox-active compound, which is not phenazine or a phenazine derivative. The present invention also relates to the use of such electrolyte compositions as redox flow battery electrolytes. Accordingly, the invention further provides a redox flow battery comprising said compositions.
    Type: Application
    Filed: February 22, 2021
    Publication date: March 30, 2023
    Inventors: Peter Geigle, Jan Hartwig, Doris Neumann, Eduard Baal, Evgeny Larionov, Isabel Scheibel, Nils Wedler, Christian Schneider
  • Method for hydrogenating nitroaromatic systems with selected platinum catalysts
    Patent number: 9452970
    Abstract: A method is described for the catalytic hydrogenation of aromatic nitro compounds with hydrogen to the corresponding amines in the presence of a supported catalyst comprising platinum. The method is characterized in that the catalyst comprising platinum has been modified with a tungsten compound and with a phosphorus compound in an oxidation state of <5. High yields and high selectivities are possible with the method.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: September 27, 2016
    Assignee: ALLESSA GMBH
    Inventors: Doris Neumann, Joachim Ritzer
  • Method for the preparation of biphephos
    Patent number: 9127030
    Abstract: The invention relates to a process for producing 6,6?-[(3,3?-di-tert-butyl-5,5?-dimethoxy-1,1?-biphenyl-2,2?diyl)bis(oxy)]bis(dibenzo[d,f][1,3,2]dioxaphosphepine), abbreviated to biphephos (see formula 1), with low chlorine content.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: September 8, 2015
    Assignee: EVONIK DEGUSSA GmbH
    Inventors: Burkard Kreidler, Dirk Fridag, Bernhard Schemmer, Bjoern Wechsler, Andrea Christiansen, Doris Neumann
  • Method for preparing cyclic ketones
    Patent number: 8802897
    Abstract: A method for hydrogenating optionally substituted phenols with one hydroxyl group to cyclohexanones over modified, palladium-comprising supported catalysts. This is possible surprisingly in selected alcoholic solvents with high selectivity. Here it is even possible to recycle the catalysts employed, which hitherto has only been possible with considerable loss of selectivity.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: August 12, 2014
    Assignee: Allessa GmbH
    Inventors: Doris Neumann, Joachim Ritzer, Gunther Effenberger
  • Method for Hydrogenating Nitroaromatic Systems with Selected Platinum Catalysts
    Publication number: 20140066658
    Abstract: A method is described for the catalytic hydrogenation of aromatic nitro compounds with hydrogen to the corresponding amines in the presence of a supported catalyst comprising platinum. The method is characterized in that the catalyst comprising platinum has been modified with a tungsten compound and with a phosphorus compound in an oxidation state of <5. High yields and high selectivities are possible with the method.
    Type: Application
    Filed: September 3, 2013
    Publication date: March 6, 2014
    Inventors: Doris Neumann, Joachim Ritzer
  • METHOD FOR THE PREPARATION OF BIPHEPHOS
    Publication number: 20130324756
    Abstract: The invention relates to a process for producing 6,6?-[(3,3?-di-tert-butyl-5,5?-dimethoxy-1,1?-biphenyl-2,2?diyl)bis(oxy)]bis(dibenzo[d,f][1,3,2]dioxaphosphepine), abbreviated to biphephos (see formula 1), with low chlorine content
    Type: Application
    Filed: December 22, 2011
    Publication date: December 5, 2013
    Applicant: Evonik Oxeno GmbH
    Inventors: Burkard Kreidler, Dirk Fridag, Bernhard Schemmer, Bjoern Wechsler, Andrea Christiansen, Doris Neumann
  • METHOD FOR THE PURIFICATION OF BIPHEPHOS
    Publication number: 20130317246
    Abstract: The invention relates to a process for the purification of 6,6?-[(3,3?-di-tert-butyl-5,5?-dimethoxy-1,1?-biphenyl-2,2?diyl)bis(oxy)]bis(dibenzo[d,f][1,3,2]dioxaphosphepin), abbreviation: biphephos (see formula 1).
    Type: Application
    Filed: December 22, 2011
    Publication date: November 28, 2013
    Applicant: Evonik Oxeno GmbH
    Inventors: Burkard Kreidler, Dirk Fridag, Bernhard Schemmer, Bjoern Wechsler, Andrea Christiansen, Doris Neumann