Patents by Inventor Stefan Gurtzgen

Stefan Gurtzgen 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).

  • Synthesis of novel organometallics and their use in olefin polymerization
    Patent number: 5726332
    Abstract: Novel bimetallic organometallic compounds, their synthesis and application in polymerization catalyst system based on combination of such novel bimetallic organometallic compounds with transition metal complexes is provided.
    Type: Grant
    Filed: May 1, 1996
    Date of Patent: March 10, 1998
    Assignees: Witco GmbH, The Research Foundation of the State University of New York
    Inventors: John J. Eisch, Wolfram Uzick, Katrin MacKenzie, Stefan Gurtzgen, Rainer Rieger
  • Process for preparing aluminoxane on inert support material
    Patent number: 5534474
    Abstract: The invention relates to a process for preparing alkylaluminoxanes immobilized on inert support materials from alkylaluminum compounds and water, which is characterized in that the reactants are metered with the gas stream into a fluidized-bed reactor and the reaction product is fixed on the support directly from the gas phase.
    Type: Grant
    Filed: March 13, 1995
    Date of Patent: July 9, 1996
    Assignee: Witco GmbH
    Inventors: Ralf-Jurgen Becker, Stefan Gurtzgen, Dirk Kutschera
  • Process for the preparation of alkylaluminoxanes on inert support materials
    Patent number: 5446001
    Abstract: The invention relates to a process for the preparation of alkylaluminoxanes immobilized on inert support materials, characterized in that alkylaluminoxanes present in the form of dispersions are fixed on inert support materials.
    Type: Grant
    Filed: March 16, 1994
    Date of Patent: August 29, 1995
    Assignee: Witco GmbH
    Inventor: Stefan Gurtzgen
  • Process for preparing solutions of oligomeric methylaluminoxanes
    Patent number: 5427992
    Abstract: The invention relates to a process for preparing solutions of oligomeric methylaluminoxanes, which contain trimethylaluminum in the free and/or complexed form, in hydrocarbons by partial hydrolysis of trimethylaluminum with water and to carrying out this process in a rotor/stator reaction machine.The product obtained is suitable for preparing highly active polymerization catalysts.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: June 27, 1995
    Assignee: WITCO GmbH
    Inventors: Jurgen Graefe, Stefan Gurtzgen, Karl H. Muller, Jurgen Schneider, Rolf Schrader
  • Method of preparing alkoxy-magnesium halides
    Patent number: 5414158
    Abstract: It has surprisingly now been discovered that alkoxy-magnesium halides of the general formula ROMgX wherein R is an alkyl having from about 1 to 18 carbon atoms and X is a halide can be synthesized in an inert hydrocarbon in just one step process by reacting magnesium which has been preliminarily activated with small quantities (approximately 5 mol %) of magnesium alkyl with a substantially equimolar mixture of an alkyl halide and an alkanol. That is, the present invention provides a one step reaction process for preparing alkoxy-magnesium halides. This one step reaction process involves reacting magnesium metal which has been previously activated with a magnesium-alkyl compound, with an equimolar mixture of an alkyl halide and an alkanol. Yields in excess of 90% can be obtained by employing the inventive one step reaction process.
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: May 9, 1995
    Assignee: Witco GmbH
    Inventor: Stefan Gurtzgen
  • Process for the preparation of aluminoxanes
    Patent number: 5403942
    Abstract: The invention relates to a process for the preparation of aluminoxanes by addition of water to a solution of trialkylaluminum in an inert solvent, characterized in that the water required for the reaction is metered via a mixing nozzle into a static mixer, in particular a jet loop reactor.
    Type: Grant
    Filed: March 16, 1994
    Date of Patent: April 4, 1995
    Assignee: Witco GmbH
    Inventors: Ralf-Jurgen Becker, Stefan Gurtzgen, Rolf Schrader
  • Process for preparing trimethylaluminum by reacting methylaluminum chlorides with sodium in solids reactors
    Patent number: 5380898
    Abstract: The invention relates to a process for preparing trimethylaluminum from methylaluminum chlorides and sodium or magnesium which is characterized in that the components are reacted in a solids reactor.
    Type: Grant
    Filed: April 9, 1993
    Date of Patent: January 10, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Stefan Gurtzgen, Jurgen Schneider, Rolf Schrader
  • Process for preparing trimethylaluminum by reducing methylaluminum chlorides with sodium using high shearing forces
    Patent number: 5359116
    Abstract: The invention relates to a process for preparing tri-methylaluminum from methylaluminum chlorides and sodium in a suspending agent, the reactants being subjected to the shearing action of a rotor-stator machine.
    Type: Grant
    Filed: April 9, 1993
    Date of Patent: October 25, 1994
    Assignee: Witco GmbH
    Inventors: Ralf J. Becker, Stefan Gurtzgen, Jurgen Schneider, Rolf Schrader