Patents by Inventor Hermann Tropp

Hermann Tropp 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 purifying 1,2-dichloroethane
    Patent number: 7309804
    Abstract: A process for the preparation of 1,2-dichloroethane that is very pure with respect to chloral or/and chloral hydrate and carbon dioxide is described herein. The process comprises oxychlorination of ethylene, using hydrogen chloride and an oxygen-containing gas, and alkali treatment of the 1,2-dichloroethane produced. In the process, the carbon dioxide present in the 1,2-dichloroethane-containing organic phase is, in accordance with the invention, substantially separated out from the 1,2-dichloroethane-containing organic phase before the alkali treatment.
    Type: Grant
    Filed: October 25, 2002
    Date of Patent: December 18, 2007
    Assignees: Vinnolit Technologie GmbH & Co., Vintron GmbH
    Inventors: Helmut Grumann, Manfred Stoger, Jurgen Eichler, Dieter Jaculi, Winfried Lork, Arend Greve, Jan Wilkens, Peter Kammerhofer, Hermann Tropp
  • Process for purifying 1,2-dichloroethane
    Publication number: 20030055301
    Abstract: A process for the preparation of 1,2-dichloroethane that is very pure with respect to chloral or/and chloral hydrate and carbon dioxide is described herein. The process comprises oxychlorination of ethylene, using hydrogen chloride and an oxygen-containing gas, and alkali treatment of the 1,2-dichloroethane produced. In the process, the carbon dioxide present in the 1,2-dichloroethane-containing organic phase is, in accordance with the invention, substantially separated out from the 1,2-dichloroethane-containing organic phase before the alkali treatment.
    Type: Application
    Filed: October 25, 2002
    Publication date: March 20, 2003
    Inventors: Helmut Grumann, Manfred Stoger, Jurgen Eichler, Dieter Jaculi, Winfried Lork, Arend Greve, Jan Wilkens, Peter Kammerhofer, Hermann Tropp