Patents by Inventor Benno Kruger

Benno Kruger 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 the preparation of trioxane
    Patent number: 5508449
    Abstract: In a process for the preparation of trioxane from formaldehyde in the gas phase in the presence of a catalyst, the catalyst employed is 11-molybdo-1-vanadophosphoric acid, H.sub.4 PVMo.sub.11 O.sub.40 .multidot.n H.sub.2 O (n=0-32).Advantages of this process are, inter alia, high space-time yields and the suppression of byproducts.
    Type: Grant
    Filed: January 6, 1994
    Date of Patent: April 16, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerhard Emig, Benno Kruger, Frank Kern, Michael Hoffmockel, Karl-Friedrich Muck, Gunter Sextro
  • Process for the preparation of trioxane
    Patent number: 5508448
    Abstract: A process for the catalytic preparation of trioxane from formaldehyde in the gas phase employs a catalyst comprising vanadyl hydrogenphosphate hemihydrate which may be unactivated or activated by steam.No byproducts were obtained in the process and the space-time yield is high. Deposits in the reactor do not occur.
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: April 16, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerhard Emig, Benno Kruger, Frank Kern, Michael Hoffmockel, Karl-Friedrich Muck, Gunter Sextro