Patents by Inventor Thomas Wallek

Thomas Wallek 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 cleaning wastewaters from melamine plants
    Patent number: 8673158
    Abstract: The invention relates to a method for purifying wastewaters of melamine systems. The method is characterized in that triazine-containing wastewater is subjected to a thermal pretreatment stage, whereupon the vapors are condensed from the gas phase of the thermal pretreatment stage, and the liquid phase of the thermal pretreatment stage is subjected to a thermal hydrolysis stage while NH3 is isolated from the obtained liquid phase containing H2O, CO2, and NH3. The inventive method makes it possible to compensate varying wastewater qualities, thus allowing the melamine system and wastewater station to be operated in a constant and safe fashion. Furthermore, the strain on the subsequent thermal hydrolysis stage is relieved with the aid of the thermal pretreatment stage of the inventive method.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: March 18, 2014
    Assignee: AMI Agrolinz Melamine International GmbH
    Inventors: Wolfgang Ruech, Christoph Neumüller, Thomas Wallek
  • METHOD FOR THE PURIFICATION OF WASTEWATERS FROM MELAMINE SYSTEMS
    Publication number: 20090294272
    Abstract: The invention relates to a method for purifying wastewaters of melamine systems. The method is characterized in that triazine-containing wastewater is subjected to a thermal pretreatment stage, whereupon the vapors are condensed from the gas phase of the thermal pretreatment stage, and the liquid phase of the thermal pretreatment stage is subjected to a thermal hydrolysis stage while NH3 is isolated from the obtained liquid phase containing H2O, CO2, and NH3. The inventive method makes it possible to compensate varying wastewater qualities, thus allowing the melamine system and wastewater station to be operated in a constant and safe fashion. Furthermore, the strain on the subsequent thermal hydrolysis stage is relieved with the aid of the thermal pretreatment stage of the inventive method.
    Type: Application
    Filed: June 13, 2006
    Publication date: December 3, 2009
    Applicant: AMI GROLINZ MELAMINE INTERNATIONAL GMBH
    Inventors: Wolfgang Ruech, Christoph Neumüller, Thomas Wallek