Patents by Inventor Udo Boegel

Udo Boegel 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).

  • Method for cleaning phosgene conducting apparatus
    Patent number: 11213867
    Abstract: The invention relates to a method for cleaning a phosgene conducting apparatus, comprising: washing the apparatus with hot inert gas, followed by washing the apparatus with cold inert gas; conveying gaseous ammonia for breaking down phosgene residues with a continuous increase in temperature until a maximum temperature ranging between 30° C. to 120° C. is reached; once the maximum temperature is reached, shutting down the ammonia supply and the conveying of inert gas, optionally followed by washing the apparatus with an aqueous stream.
    Type: Grant
    Filed: September 3, 2018
    Date of Patent: January 4, 2022
    Assignee: Covestro Deutschland AG
    Inventors: Dirk Manzel, Peter Plathen, Peter Wolf, Udo Boegel
  • METHOD FOR CLEANING PHOSGENE CONDUCTING APPARATUS
    Publication number: 20200246845
    Abstract: The invention relates to a method for cleaning a phosgene conducting apparatus, comprising: washing the apparatus with hot inert gas, followed by washing the apparatus with cold inert gas; conveying gaseous ammonia for breaking down phosgene residues with a continuous increase in temperature until a maximum temperature ranging between 30° C. to 120° C. is reached; once the maximum temperature is reached, shutting down the ammonia supply and the conveying of inert gas, optionally (and preferably) followed by washing the apparatus with an aqueous stream.
    Type: Application
    Filed: September 3, 2018
    Publication date: August 6, 2020
    Inventors: Dirk Manzel, Peter Plathen, Peter Wolf, Udo Boegel