Patents Assigned to Crompton GmbH
  • Process for preparing monoalkyltin halides and dialkyltin halides and their use
    Patent number: 6846944
    Abstract: The invention relates to a process for the direct preparation of mixtures of monoalkyltin trichlorides RSnCl3 and dialkyltin dichlorides R2SnCl2 in one reaction step by partial alkylation of tin tetrachloride using alkylaluminum compounds in the form of their ether donor complexes, wherein an amount of ether greater than that required for stoichiometric formation of the donor complex is used in the reaction.
    Type: Grant
    Filed: July 23, 2003
    Date of Patent: January 25, 2005
    Assignee: Crompton GmbH
    Inventors: Oliver Schumacher, Liane Franke
  • 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 the hydrogenation of unsaturated transition metal compounds
    Patent number: 6765103
    Abstract: The invention relates to a process for preparing transition metal compounds having hydrogenated or partially hydrogenated monocyclic, bicyclic or polycyclic ligands, which is characterized in that the unsaturated monocyclic, bicyclic or polycyclic transition metal compound together with hydrogen is introduced continuously or all at once under pressure into a static mixer in the presence of a suitable solubilizer and a catalyst.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: July 20, 2004
    Assignee: Crompton GmbH
    Inventors: Burkhardt Giese, Richard Lisowsky, Jan Timmermann, Thomas Wanke, Mario Hüttenhofer
  • Process for the preparation of alkali metal tetraalkylaluminates and use thereof
    Patent number: 6734317
    Abstract: The present invention relates to a process for preparing alkali metal tetraalkylaluminates, in particular potassium tetraethylaluminate, and also to the use of such an aluminate complex in aluminum deposition by electroplating-electrolysis.
    Type: Grant
    Filed: May 27, 2003
    Date of Patent: May 11, 2004
    Assignee: Crompton GmbH
    Inventors: Peter Heitmann, Thomas Wanke, Mario Hüttenhofer
  • Process for the preparation of alkali metal tetraalkylaluminates and use thereof
    Publication number: 20030233004
    Abstract: Process for the preparation of alkali metal tetraalkylaluminates and use thereof The present invention relates to a process for preparing alkali metal tetraalkylaluminates, in particular potassium tetraethylaluminate, and also to the use of such an aluminate complex in aluminum deposition by electroplating-electrolysis.
    Type: Application
    Filed: May 27, 2003
    Publication date: December 18, 2003
    Applicant: CROMPTON GmbH
    Inventors: Peter Heitmann, Thomas Wanke, Mario Huttenhofer
  • 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 hydrogenation of unsaturated transition metal compounds
    Publication number: 20030109731
    Abstract: The invention relates to a process for preparing transition metal compounds having hydrogenated or partially hydrogenated monocyclic, bicyclic or polycyclic ligands, which is characterized in that the unsaturated monocyclic, bicyclic or polycyclic transition metal compound together with hydrogen is introduced continuously or all at once under pressure into a static mixer in the presence of a suitable solubilizer and a catalyst.
    Type: Application
    Filed: December 11, 2002
    Publication date: June 12, 2003
    Applicant: Crompton GmbH
    Inventors: Burkhardt Giese, Richard Lisowsky, Jan Timmermann, Thomas Wanke, Mario Huttenhofer
  • Process for preparing water-soluble catalysts
    Patent number: 6531618
    Abstract: The invention relates to a process for preparing water-soluble organotin catalysts by contacting organotin compounds with polyelectrolytes and, optionally, subsequently removing the water.
    Type: Grant
    Filed: May 25, 2000
    Date of Patent: March 11, 2003
    Assignee: Crompton GmbH
    Inventors: Oliver Schumacher, Ursula Gerigk