Patents by Inventor Hans Thor

Hans Thor 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).

  • 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