Patents by Inventor Rainer Rieger

Rainer Rieger 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 preparing partial hydrolysates of organometallic compounds or transition metal catalysts immobilized on inert support materials
    Patent number: 6781007
    Abstract: The invention relates to a process for preparing partial hydrolysates of organometallic compounds and to a process for preparing partial hydrolysates of organometallic compounds, in particular alkylaluminoxanes, or transition metal catalysts immobilized on inert support materials and also to the products prepared by this process.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: August 24, 2004
    Assignee: Crompton GmbH
    Inventors: Rainer Rieger, Ralf Alexander Wendt, Thomas Wanke
  • Process for preparing partial hydrolysates of organometallic compounds or transition metal catalysts immobilized on inert support materials
    Publication number: 20030139618
    Abstract: The invention relates to a process for preparing partial hydrolysates of organometallic compounds and to a process for preparing partial hydrolysates of organometallic compounds, in particular alkylaluminoxanes, or transition metal catalysts immobilized on inert support materials and also to the products prepared by this process.
    Type: Application
    Filed: December 11, 2002
    Publication date: July 24, 2003
    Applicant: Crompton GmbH
    Inventors: Rainer Rieger, Ralf Alexander Wendt, Thomas Wanke
  • Process for the preparation of metallocene catalyst systems on inert support material using gas phase reactor
    Patent number: 6124229
    Abstract: Disclosed is a process for preparing a supported metallocene catalyst by introducing, in a first stage, a gas stream comprising an organoaluminum compound, an inert support material and water, into a first gas phase reactor; allowing the mixture to react under conditions effective to form an aluminoxane supported on said inert support material; metering a second gas stream comprising a metallocene into said gas phase reactor; allowing said mixture to react under conditions effective to form a supported metallocene catalyst; and drying, in a second stage, said supported metallocene catalyst, wherein said drying is carried out in a gas phase reactor.
    Type: Grant
    Filed: August 22, 1996
    Date of Patent: September 26, 2000
    Assignee: Witco GmbH
    Inventors: Ralf-Jurgen Becker, Rainer Rieger
  • Fluidized bed gas phase process of preparing a supported metallocene catalyst
    Patent number: 5789332
    Abstract: The present invention is directed to a gas phase process of preparing a supported metallocene catalyst wherein an alkylaluminum compound, water, a metallocene and, optionally, an olefin are metered into a fluidized bed reactor containing a fluidized bed of an inert support material in the presence of a gas stream.
    Type: Grant
    Filed: August 22, 1996
    Date of Patent: August 4, 1998
    Assignee: Witco GmbH
    Inventors: Dirk Kutschera, Rainer Rieger
  • Stable homogeneous formulations of oxidaton- sensitive organometallic compounds in paraffins and process for their preparation
    Patent number: 5753144
    Abstract: Disclosed are homogeneous formulations consisting essentially of one or more oxidation-sensitive organometallic compounds in a hydrocarbon, such as paraffins having a boiling point of at least 150.degree. C. and a viscosity of at least 1 Pa.s at 25.degree. C. Also disclosed is a process for the preparation of these formulations.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: May 19, 1998
    Assignee: Witco GmbH
    Inventors: Rainer Rieger, Hans-Gunter Volland, Wolfram Uzick
  • 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