Patents by Inventor Sarah LIMBRUNNER

Sarah LIMBRUNNER 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: 11400442
    Abstract: The disclosure relates to a process for producing a VPO catalyst containing molybdenum and a vanadyl pyrophosphate phase, which comprises the steps: a) provision of a reaction mixture comprising a V(V) compound, a P(V) compound, an Mo compound, a reducing agent and a solvent, b) reduction of the V(V) compound by means of the reducing agent at least in parts to give vanadyl hydrogenphosphate in order to obtain an intermediate suspension, c) filtration of the intermediate suspension from step b) in order to obtain an intermediate, d) drying of the intermediate at a temperature of not more than 350° C. in order to obtain a dried intermediate and e) activation of the dried intermediate at a temperature above 200° C., characterized in that not more than 0.2% by weight of water, based on the weight of the reaction mixture, is present in step a) and no water is withdrawn during the reduction in step b).
    Type: Grant
    Filed: January 16, 2020
    Date of Patent: August 2, 2022
    Assignee: CLARIANT INTERNATIONAL LTD
    Inventors: Sebastian Boecklein, Gerhard Mestl, Gabriele Bindseil, Rene Hausmann, Sarah Limbrunner, Anna Waldschuetz
  • Publication number: 20200222893
    Abstract: The disclosure relates to a process for producing a VPO catalyst containing molybdenum and a vanadyl pyrophosphate phase, which comprises the steps: a) provision of a reaction mixture comprising a V(V) compound, a P(V) compound, an Mo compound, a reducing agent and a solvent, b) reduction of the V(V) compound by means of the reducing agent at least in parts to give vanadyl hydrogenphosphate in order to obtain an intermediate suspension, c) filtration of the intermediate suspension from step b) in order to obtain an intermediate, d) drying of the intermediate at a temperature of not more than 350° C. in order to obtain a dried intermediate and e) activation of the dried intermediate at a temperature above 200° C., characterized in that not more than 0.2% by weight of water, based on the weight of the reaction mixture, is present in step a) and no water is withdrawn during the reduction in step b).
    Type: Application
    Filed: January 16, 2020
    Publication date: July 16, 2020
    Inventors: Sebastian BOECKLEIN, Gerhard MESTL, Gabriele BINDSEIL, Rene HAUSMANN, Sarah LIMBRUNNER, Anna WALDSCHUETZ