Patents by Inventor Christina Jarnvik

Christina Jarnvik 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).

  • Chemical process and composition
    Patent number: 7425316
    Abstract: The invention relates to a process for production of hydrogen peroxide according to the anthraquinone process including altemate hydrogenation and oxidation of one or more quinones selected from anthraquinones and/or tetrahydro anthraquinones in a working solution comprising at least one quinone solvent and at least one hydroquinone solvent, wherein said at least one quinone solvent comprises isodurene in an amount from 15 to 100 wt %. The invention also relates to a composition useful as a working solution at production hydrogen peroxide.
    Type: Grant
    Filed: October 20, 2005
    Date of Patent: September 16, 2008
    Assignee: Akzo Nobel NV
    Inventors: Mats Nystrom, Christina Jarnvik
  • Chemical process and composition
    Patent number: 7001584
    Abstract: The invention relates to a process for production of hydrogen peroxide according to the anthraquinone process including alternate hydrogenation and oxidation of one or more quinones selected from anthraquinones and/or tetrahydro anthraquinones in a working solution comprising at least one quinone solvent and at least one hydroquinone solvent, wherein said at least one quinone solvent comprises isodurene in an amount from 15 to 100 wt %. The invention also relates to a composition useful as a working solution at production of hydrogen peroxide.
    Type: Grant
    Filed: June 12, 2001
    Date of Patent: February 21, 2006
    Assignee: Akzo Nobel N.V.
    Inventors: Mats Nyström, Christina Järnvik
  • Chemical process and composition
    Publication number: 20060034751
    Abstract: The invention relates to a process for production of hydrogen peroxide according to the anthraquinone process including alternate hydrogenation and oxidation of one or more quinones selected from anthraquinones and/or tetrahydro anthraquinones in a working solution comprising at least one quinone solvent and at least one hydroquinone solvent, wherein said at least one quinone solvent comprises isodurene in an amount from 15 to 100 wt %. The invention also relates to a composition useful as a working solution at production of hydrogen peroxide.
    Type: Application
    Filed: October 20, 2005
    Publication date: February 16, 2006
    Applicant: Akzo Nobel N.V.
    Inventors: Mats Nystrom, Christina Jarnvik
  • Process for producing hydrogen peroxide and composition therefor
    Patent number: 6524547
    Abstract: The invention concerns a process for production of hydrogen peroxide according to the anthraquinone process comprising the steps of alternate hydrogenation and oxidation of anthraquinones and tetrahydro anthraquinones in a working solution comprising a mixture of alkyl-substituted anthraquinones and alkyl-substituted tetrahydro anthraquinones dissolved in at least one organic solvent, wherein from 10 to 55 mole % of the anthraquinones and the tetrahydro anthraquinones are substituted with one amyl group, and the molar ratio of alkyl-substituted tetrahydro anthraquinones to alkyl-substituted anthraquinones is at least 1:1. The invention also concerns a composition useful as a working solution in said process.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: February 25, 2003
    Assignee: Akzo Nobel N.V.
    Inventors: Mats Nyström, Christina Järnvik, Hans Thor, Seppo Saari
  • Chemical process and composition
    Publication number: 20020110515
    Abstract: The invention relates to a process for production of hydrogen peroxide according to the anthraquinone process including alternate hydrogenation and oxidation of one or more quinones selected from anthraquinones and/or tetrahydro anthraquinones in a working solution comprising at least one quinone solvent and at least one hydroquinone solvent, wherein said at least one quinone solvent comprises isodurene in an amount from 15 to 100 wt %. The invention also relates to a composition useful as a working solution at production of hydrogen peroxide.
    Type: Application
    Filed: June 12, 2001
    Publication date: August 15, 2002
    Applicant: Akzo Nobel N.V.
    Inventors: Mats Nystrom, Christina Jarnvik