Patents by Inventor Harald Schwentker

Harald Schwentker 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).

  • Isolation of butadiene from a C.sub.4 -hydrocarbon mixture
    Patent number: 4292141
    Abstract: A process for isolating butadiene, with the aid of a selective solvent, from a C.sub.4 -hydrocarbon mixture which contains butadiene and small amounts of styrene and may contain oxygen, hydrocarbons more soluble than butadiene in the selective solvent and hydrocarbons less soluble than butadiene in the selective solvent, in which process the C.sub.4 -hydrocarbon mixture is separated by extractive distillation into a distillate which contains the less soluble hydrocarbons, a stream of butadiene and a stream containing the more soluble hydrocarbons, and in which a mixture of styrene and C.sub.4 -hydrocarbons is removed from the C.sub.4 -hydrocarbon mixture in a distillation zone upstream of the extractive distillation, the top product of the said distillation zone being fed to the extractive distillation.
    Type: Grant
    Filed: August 22, 1979
    Date of Patent: September 29, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Alfred Lindner, Klaus Volkamer, Ulrich Wagner, Dieter Pommer, Klaus-Juergen Schneider, Harald Schwentker
  • Separation of a mixture of C.sub.4 -hydrocarbons by extractive distillation
    Patent number: 4162198
    Abstract: A process for separating, by means of a selective solvent, a mixture of C.sub.
    Type: Grant
    Filed: May 17, 1978
    Date of Patent: July 24, 1979
    Assignee: BASF Aktiengesellschaft
    Inventors: Dieter Stockburger, Klaus Volkamer, Detlef Bender, Klaus-Juergen Schneider, Harald Schwentker, Ulrich Wagner, Hans-Martin Weitz