Patents by Inventor Eberhard Dreher

Eberhard Dreher 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).

  • Patent number: 4849562
    Abstract: The oxychlorination process for producing ethylene dichloride is carried out by reacting ethylene with hydrogen chloride and oxygen in an oxychlorination reactor. Thereby, ethyl chloride and perhaps vinyl chloride are produced as by-products. The effluent from the reactor is at least fractionated into an ethylene dichloride-rich fraction (I) and an ethyl chloride-rich fraction (II) so that fraction (I) contains less than 50 percent of the total weight of ethyl chloride produced in step (a) and the sum of the weight of ethylene dichloride and vinyl chloride in fraction (II) is less than 30 percent of the weight of ethyl chloride in fraction (II). The ethyl chloride-rich fraction (II) is subjected to a cracking reaction in the presence or absence of an inert diluent wherein ethyl chloride is converted into ethylene and hydrogen chloride in the presence of a catalyst.
    Type: Grant
    Filed: August 26, 1988
    Date of Patent: July 18, 1989
    Assignee: The Dow Chemical Company
    Inventors: Christoph Buhs, Eberhard Dreher, Garnet E. McConchie