Patents by Inventor Dieter Karau

Dieter Karau 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 optimizing the properties of aqueous polymer solutions used in polymer flooding
    Patent number: 4675348
    Abstract: The invention relates to a process for optimizing the properties of aqueous polymer solutions used for polymer flooding which comprises treating the polymer solutions under turbulent flow conditions in dynamic fluid dispersing or pumping equipment such that the residence time of the polymer solution in this equipment is less than approximately 20 seconds and the pump energy used is from about 1 to about 15 watts/liter of solution processed.This process permits the optimization of flow properties important in polymer flooding which results in the improved efficiency of the polymer flooding process.
    Type: Grant
    Filed: June 13, 1985
    Date of Patent: June 23, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz-Dieter Martischius, Dieter Karau, Werner Arnold, Klaus Barthold
  • Recovery of phthalic anhydride
    Patent number: 4008255
    Abstract: Process for the recovery of phthalic anhydride in which gases as obtained in the catalytic atmospheric oxidation of o-xylene or naphthalene are treated with a hydrocarbon containing C.sub.26.sub.- paraffins, cooling, if necessary, the hydrocarbon laden with phthalic anhydride, separating the solid phthalic anhydride followed by melting and distillation thereof.
    Type: Grant
    Filed: June 23, 1975
    Date of Patent: February 15, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Friedrich Wirth, Wolfgang Kube, Paul Hornberger, Otto Leman, Joachim Wagner, Dieter Karau