Patents by Inventor Martin Leisse

Martin Leisse 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 pure benzene and pure toluene from aromatic hydrocarbon products
    Patent number: 5723026
    Abstract: The production of high purity benzene and high purity toluene is obtained by utilizing the initial gas separating column for the treatment of the aromatic containing starting material as a separating column for separating a benzene rich from a toluene rich component. The benzene rich component is subject directly to distillation while the toluene is subject to predistillation to separate high boiling components and only then to extractive distillation is distilled to separate the high purity benzene from the high purity toluene.
    Type: Grant
    Filed: August 18, 1995
    Date of Patent: March 3, 1998
    Assignee: Krupp Koppers GmbH
    Inventors: Martin Leisse, Hans-Jurgen Vollmer, Uwe Ranke