Patents by Inventor Ernst-Ulrich Dorf

Ernst-Ulrich Dorf 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).

  • Method for oxidizing hydrocarbons
    Publication number: 20030204102
    Abstract: The present invention relates to a catalyst for oxidizing hydrocarbons with a hydrogen/oxygen mixture. The catalyst contains a) a support material containing titanium and b) silver particles having an average particle size of from 0.3 to 100 nm.
    Type: Application
    Filed: June 3, 2003
    Publication date: October 30, 2003
    Inventors: Markus Weisbeck, Ernst Ulrich Dorf, Gerhard Wegener, Christoph Schild
  • Method for oxidizing hydrocarbons
    Patent number: 6603028
    Abstract: The invention relates to a method for oxidizing hydrocarbons with a hydrogen/oxygen mixture in the presence of a catalyst. The catalyst contains a) a support material which contains titanium and b) silver particles having an average particle size ranging from 0.3 to 100 nm.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: August 5, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Markus Weisbeck, Ernst Ulrich Dorf, Gerhard Wegener, Christoph Schild
  • Method for the direct catalytic oxidation of unsaturated hydrocarbons in gaseous phase
    Patent number: 6548682
    Abstract: A supported catalyst coated with gold particles is produced. This supported catalyst is used to oxidize unsaturated hydrocarbons in the gas phase with a hydrogen/oxygen mixture.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: April 15, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Markus Weisbeck, Ernst-Ulrich Dorf, Gerhard Wegener, Christoph Schild, Bernhard Lücke, Herbert Dilcher, Ulrich Schülke
  • Integrated method for producing epoxides from olefins
    Patent number: 6504040
    Abstract: The invention relates to an integrated process for the preparation of epoxidised olefins. In the first stage, dilute hydrogen peroxide solutions are prepared from the elements hydrogen and oxygen and are reacted in a subsequent liquid-phase epoxidation with olefin in the presence of titanium silicalite to form epoxidised olefins, and the solvents are returned to the H2O2 process again.
    Type: Grant
    Filed: June 7, 2001
    Date of Patent: January 7, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Vogtel, Ernst-Ulrich Dorf, Gerhard Wegener, Markus Weisbeck
  • Supported catalyst and the process for preparing the same
    Patent number: 6504039
    Abstract: The present invention relates to supported catalysts which are composed of titanium oxide hydrates coated with nanoscale gold particles. The catalysts of the present invention have increased activity over known catalysts.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: January 7, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Markus Weisbeck, Ernst-Ulrich Dorf, Gerhard Wegener, Christoph Schild, Bernhard Lücke, Herbert Dilcher, Ulrich Schülke
  • Supported catalyst and the process for preparing the same
    Publication number: 20020165404
    Abstract: The present invention relates to supported catalysts which are composed of titanium oxide hydrates coated with nanoscale gold particles. The catalysts of the present invention have increased activity over known catalysts.
    Type: Application
    Filed: May 15, 2002
    Publication date: November 7, 2002
    Inventors: Markus Weisbeck, Ernst-Ulrich Dorf, Gerhard Wegener, Christoph Schild, Bernhard Lucke, Herbert Dilcher, Ulrich Schulke
  • Process for lowering the crystallization temperature of polyarylene sulphides
    Patent number: 5235035
    Abstract: This invention relates to a process for lowering the crystallization temperature of polyarylene sulphides.
    Type: Grant
    Filed: December 3, 1990
    Date of Patent: August 10, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Claus H. Wulff, Ernst-Ulrich Dorf
  • Linear and branched poly-p-arylene sulfide substantially free from defect structures having plural absorption maxima
    Patent number: 5138031
    Abstract: The invention relates to linear and branched poly-p-arylene sulfides (PAS), preferably poly-p-phenylene sulfides (PPS), which have an extremely low proportion of defect or foreign structures, to a process for their production and to their use for the production of molded articles.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: August 11, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ernst-Ulrich Dorf, Wolfgang Russeler, Gunther Weymans, Manfred Schmidt, Erich Meier
  • Polyarylene sulfides terminated by sulfonic acid and/or sulfonic acid derivative groups, their production and use
    Patent number: 5068312
    Abstract: The invention releates to oligo- and polyarylene sulfides, preferably polyphenylene sulfides, terminated by sulfonic acid and/or sulfonic acid derivative groups, to their production and to their use for the production of new polymers and new polymer mixtures.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: November 26, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ernst-Ulrich Dorf, Wolfgang Russeler, Burkhard Kohler, Wolfgang Ebert, Walter Schmitt
  • Process for the manufacture of polyarylene sulphides
    Patent number: 5066776
    Abstract: The invention concerns a process for the manufcture of polyarylene sulphides from alkali sulphide and aromatic dihalogen compounds, whereby the alkali sulphide is produced in situ.
    Type: Grant
    Filed: August 13, 1990
    Date of Patent: November 19, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wolfgang Russeler, Karsten-Josef Idel, Ernst-Ulrich Dorf, Wolfgang Alewelt, Dieter Freitag
  • Copoly arylene/alkylene sulfide
    Patent number: 5066775
    Abstract: The invention relates to new sulphur-containing copolymers, a process for their preparation from a sulphur source and a mixture of dihalogenoaromatics and dihalogenoaliphatics and their use for the production of shaped articles.
    Type: Grant
    Filed: February 5, 1990
    Date of Patent: November 19, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ernst-Ulrich Dorf, Klaus Reinking, Wolfgang Jakob, Erhard Tresper, Wolfgang Russeler
  • Process for the production of high molecular weight, optionally branched polyarylene sulfides
    Patent number: 5037952
    Abstract: The invention relates to a process for the production of high molecular weight, optionally branched polyarylene sulfides having a low content of organically bound halogen. They are prepared by reaction of alkali sulfides and/or alkali hydrogen sulfides with aromatic dihalogen compounds in a polar organic solvent.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: August 6, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Manfred Schmidt, Erhard Tresper, Wolfgang Alewelt, Ernst-Ulrich Dorf, Wolfgang Russeler
  • Process for the production of unbranched polyarylene sulfides of improved color quality and improved color stability
    Patent number: 5017682
    Abstract: The invention relates to a process for the production of linear, unbranched polyarylene sulfides from aromatic dichlorine compounds and alkali sulfides in tetra-alkylated, cyclic ureas as the reaction medium.
    Type: Grant
    Filed: August 14, 1989
    Date of Patent: May 21, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Burkhard Kohler, Rolf-Volker Meyer, Ernst-Ulrich Dorf, Wolfgang Russeler, Manfred Schmidt
  • Preparation of polyarylene sulphides with ketone or pinacone
    Patent number: 4921935
    Abstract: This invention relates to a process for the preparation of polyarylene sulphides, preferably polyphenylene sulphide (PPS), whose fusion viscosities can be adjusted to specified values, from alkali metal sulphides and polyhalogenated aromatic compounds in a polar solvent in the presence of a ketone or pinacone. The resulting polyarylene sulphides which have specified fusion viscosities are distinguished by high stability of the melt and low chlorine content. They cause little corrosion in the reaction vessels used for their preparation.
    Type: Grant
    Filed: November 3, 1988
    Date of Patent: May 1, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ernst-Ulrich Dorf, Franz Alfes, Hans-Joachim Traenckner
  • Process for the preparation of polyarylene sulphides
    Patent number: 4912180
    Abstract: This invention relates to a process for the preparation of polyarylene sulphides by melt condensation, in which the sulphide bridges of the polymer are formed by the splitting off of a compound which is volatile under the reaction conditions.
    Type: Grant
    Filed: November 3, 1988
    Date of Patent: March 27, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ernst-Ulrich Dorf, Hans-Rudolph Dicke, Volker Eckhardt, Joachim Genz
  • Process for the preparation of polyarylene sulphides
    Patent number: 4906712
    Abstract: This invention relates to a process for the preparation of polyarylene sulphides by melt condensation, in which the sulphide bridges of the polymer are formed by the splitting off of a compound which is volatile under the reaction conditions.
    Type: Grant
    Filed: November 8, 1988
    Date of Patent: March 6, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ernst-Ulrich Dorf, Hans-Rudolph Dicke, Wolfgang Russeler, Volker Eckhardt, Joachim Genz
  • Process for the preparation of copolyarylene sulphides with reduced crystallization temperature
    Patent number: 4824933
    Abstract: This invention relates to a process for the preparation of polyarylene sulphides with reduced crystallization temperature.
    Type: Grant
    Filed: October 28, 1987
    Date of Patent: April 25, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Edgar Ostlinning, Ernst-Ulrich Dorf