Patents by Inventor Hanns Hofmann

Hanns Hofmann 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 preparing styrene, and an appropriate agent
    Patent number: 4400568
    Abstract: The invention relates to a process for oxidatively dehydrogenating dehydrogenatable organic compounds to prepare styrene. In this process, the compounds mentioned are reacted in the vapor phase with oxygen at a temperature above 350.degree. C. in the presence of a catalyst based on zirconium phosphate. Suitable dehydrogenatable organic compounds are above all saturated alkylaromatics, in particular ethylbenzene.
    Type: Grant
    Filed: April 16, 1982
    Date of Patent: August 23, 1983
    Assignees: Hanns Hofmann, Gerd Emig, Wolfgang Ruppert
    Inventors: Hanns Hofmann, Gerd Emig, Wolfgang Ruppert