Patents by Inventor Johanna Wanka

Johanna Wanka 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 a supported silver catalyst
    Patent number: 9199223
    Abstract: Process for producing a supported silver catalyst, which comprises (a) reacting oxalic acid with an alkali metal base in a solvent, preferably water, to the second equivalence point of oxalic acid to give alkali metal oxalate; (b) reacting the alkali metal oxalate obtained according to (a) with silver salt in a solvent, preferably water, to give silver oxalate; (c) forming a complexation of the silver oxalate obtained according to (b) with a diamine compound in a solvent, preferably water, to give a diamine-silver oxalate complex.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: December 1, 2015
    Assignee: BASF SE
    Inventors: Tobias Rosendahl, Torsten Mäurer, Cornelia K. Dobner, Andreas Lehr, Johanna Wanka
  • PROCESS FOR PRODUCING A SUPPORTED SILVER CATALYST
    Publication number: 20150174556
    Abstract: Process for producing a supported silver catalyst, which comprises (a) reacting oxalic acid with an alkali metal base in a solvent, preferably water, to the second equivalence point of oxalic acid to give alkali metal oxalate; (b) reacting the alkali metal oxalate obtained according to (a) with silver salt in a solvent, preferably water, to give silver oxalate; (c) forming a complexation of the silver oxalate obtained according to (b) with a diamine compound in a solvent, preferably water, to give a diamine-silver oxalate complex.
    Type: Application
    Filed: February 25, 2015
    Publication date: June 25, 2015
    Inventors: TOBIAS ROSENDAHL, Torsten Mäurer, Cornelia K. Dobner, Andreas Lehr, Johanna Wanka
  • Process for producing a supported silver catalyst
    Patent number: 8987482
    Abstract: Process for producing a supported silver catalyst, which comprises (a) reacting oxalic acid with an alkali metal base in a solvent, preferably water, to the second equivalence point of oxalic acid to give alkali metal oxalate; (b) reacting the alkali metal oxalate obtained according to (a) with silver salt in a solvent, preferably water, to give silver oxalate; (c) forming a complexation of the silver oxalate obtained according to (b) with a diamine compound in a solvent, preferably water, to give a diamine-silver oxalate complex.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: March 24, 2015
    Assignee: BASF SE
    Inventors: Tobias Rosendahl, Torsten Mäurer, Cornelia Katharina Dobner, Andreas Lehr, Johanna Wanka