Patents by Inventor Rhett Kempe

Rhett Kempe 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 the Oligomerisation of Olefins by Coordinative Chain Transfer Polymerisation
    Publication number: 20180280951
    Abstract: The present invention relates to a process for the oligomerisation of olefins, in particular ethylene, via coordinative chain transfer polymerisation (CCTP) and alkyl elimation reaction. A preferred embodiment of the invention relates to CCTP of olefins, in particular ethylene, with the use of guanidinato, amidinato or hydrocarbyl-2-pyridyl amine complexes of titanium, zirconium or lanthanides, a nickel or cobalt compound as chain displacement catalyst (CDC) and one or more chain shuttling agents (CSA) such as a main group metal alkyl.
    Type: Application
    Filed: May 13, 2016
    Publication date: October 4, 2018
    Inventors: Albert Boddien, Rhett Kempe, Winfried Kretschmer, Andreas Gollwitzer
  • Amidinate and guanidinate complexes, their use as chain transfer polymerization catalysts and long chain alcohols obtained by such process
    Patent number: 9579640
    Abstract: The present invention is concerned with a catalyst composition comprising titanium-, zirconium- and/or hafnium amidinate complexes and/or titanium-, zirconium- and/or hafnium guanidinate complexes and organo aluminium and/or organic zinc compounds, a coordinative chain transfer polymerization (CCTP) process employing the catalyst composition as well as long chain aluminium alkyls and subsequent alcohols obtained by such process.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: February 28, 2017
    Assignee: Sasol Performance Chemicals GmbH
    Inventors: Thoralf Gross, Holger Ziehe, Rhett Kempe, Winfried Kretschmer, Christian Hubner
  • Amidinate and Guanidinate Complexes, Their Use as Chain Transfer Polymerization Catalysts and Long Chain Alcohols Obtained by Such Process
    Publication number: 20150148505
    Abstract: The present invention is concerned with a catalyst composition comprising titanium-, zirconium- and/or hafnium amidinate complexes and/or titanium-, zirconium- and/or hafnium guanidinate complexes and organo aluminium and/or organic zinc compounds, a coordinative chain transfer polymerization (CCTP) process employing the catalyst composition as well as long chain aluminium alkyls and subsequent alcohols obtained by such process.
    Type: Application
    Filed: June 3, 2013
    Publication date: May 28, 2015
    Inventors: Thoralf Gross, Holger Ziehe, Rhett Kempe, Winfried Kretschmer, Christian Hubner
  • Aromatic compounds containing nitrogen and p- functionalized amines, the production thereof and their use in catalytic reactions
    Publication number: 20060058178
    Abstract: The present invention is directed to P-functionalized amines of nitrogen-containing compounds and to catalysts prepared by combining these amines with transition metals. The catalysts are especially useful for refining haloaromatics.
    Type: Application
    Filed: November 21, 2002
    Publication date: March 16, 2006
    Inventors: Rhett Kempe, Thomas Schareina, Axel Monsees, Thomas Riermeier