Patents by Inventor Gerhard Wirtz

Gerhard Wirtz 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 recovering solvents from solvent-containing hydrocarbon phases in hydrocarbon raffination systems
    Patent number: 4422923
    Abstract: Recovery of solvent from hydrocarbon oil extract fractions comprising solvent and oil is effected in at least three sequential flash vaporization stages wherein the pressure of the second vaporization stage is at the highest pressure level and the pressure of the third vaporization stage is at a pressure level intermediate the pressure level of the first and second vaporization stages.
    Type: Grant
    Filed: January 19, 1981
    Date of Patent: December 27, 1983
    Assignee: Edeleanu Gesellschaft mbH
    Inventors: Gerhard Wirtz, Rainer Maxelon
  • Process for the continuous recovery of thermally unstable solvent mixtures
    Patent number: 4263102
    Abstract: In recovering the multi-solvent portion of the oil solvent mixture in a solvent dewaxing process, decomposition of a thermally unstable, lower boiling solvent component is substantially avoided by recovering the solvent in a series of controlled evaporations whereby the major portion of the lower boiling solvent component is removed from the mixture prior to the removal of the remaining portion of the solvent. The solvent removal may be conducted in a high pressure evaporator having an upper section and a lower section separated by an annular tray.
    Type: Grant
    Filed: September 3, 1976
    Date of Patent: April 21, 1981
    Assignee: Edleanu GmbH
    Inventors: Victor Schorr, Gerhard Wirtz