Patents by Inventor Hansjoerg Gruetzmacher

Hansjoerg Gruetzmacher 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 acylphosphanes and derivatives thereof
    Patent number: 7439401
    Abstract: The present invention relates to a new, selective process for the preparation of mono- and bisacylphosphanes of formula (I) n and m are each independently of the other 1 or 2; R1, if n=1, is e.g. phenyl R1, if n=2, is e.g. C1-C18alkylene or phenylene; R2 is e. g. C1-C18alkyl, phenyl or substituted phenyl; R3 is e. g. C1-C18alkyl, by (1) reacting a phosphorous halide of formula IIa or a phosphorous halide oxide of formula (IIb) or a phosphorous halide sulfide of formula (IIc) with an alkali metal in a solvent in the presence of a proton source; (2) subsequent reaction with m acid halides of formula (III) An oxidation step may follow to obtain mono- and bisacylphosphane oxides or mono- and bisacylphosphane sulfides.
    Type: Grant
    Filed: July 9, 2004
    Date of Patent: October 21, 2008
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Reinhard H. Sommerlade, Souâd Boulmaâz, Jean-Pierre Wolf, Jens Geier, Hansjörg Grützmacher, Markus Scherer, Hartmut Schönberg, Daniel Stein, Peter Murer, Stephan Burkhardt
  • Process for the synthesis of cycloorganylphosphanes and di(alkyli metal/alkaline earth metal) oligophosphanediides
    Patent number: 7230137
    Abstract: The invention relates to a process for the preparation of cycloorganylphosphanes of formula 1 (R1P)n by reaction of dihalo(organyl)phosphanes of formula R1PHal2 with: a) activated zinc in an organic solvent, or with: b) an alkali metal or alkaline earth metal in a non-polar organic solvent in the presence of an activator, wherein R1 is C1–C12alkyl; C3–C12 cycloalkyl, aryl or heteroaryl, Hal is F, Cl, Br or I, and n is a number from 3 to 20. The invention relates also to novel di(alkali metal/alkaline earth metal) oligophosphanediides and to the use thereof in the preparation of organophosphorus compounds.
    Type: Grant
    Filed: November 24, 2003
    Date of Patent: June 12, 2007
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Hansjörg Grützmacher, Jens Geier, Hartmut Schönberg, Markus Scherer, Daniel Stein, Souâd Boulmaâz
  • Preparation of phosphorus compounds
    Patent number: 7112696
    Abstract: The present invention relates to a process for preparing phosphorus compounds and intermediates.
    Type: Grant
    Filed: May 5, 2004
    Date of Patent: September 26, 2006
    Assignee: Bayer Chemicals AG
    Inventors: Hansjörg Grützmacher, Elisabetta Piras
  • Bistropylidenediamines and use thereof
    Publication number: 20050283014
    Abstract: The present invention relates to bistropylidenediamines, to a process for their preparation and to the use thereof in catalysis.
    Type: Application
    Filed: June 6, 2005
    Publication date: December 22, 2005
    Inventors: Hansjörg Grützmacher, Pascal Maire
  • Process for the selective oxidation of alcohols using readily removable nitroxyl radicals
    Patent number: 6660860
    Abstract: The invention relates to a process for the selective oxidation of alcohols to ketones or to aldehydes by means of an alkali hypohalite under alkaline conditions, which comprises carrying out the oxidation in the presence of a heterogeneous oxidation catalyst that is insoluble in the reaction medium and is selected from the group comprising the compounds of formula (I) wherein n is a number from 3 to 3000; or a 4-oxy-2,2,6,6-tetramethylpiperidin-1-oxyl that is 4-oxy-bound to a Merrifield polymer. The invention relates also to the compounds of formulae (II) and (III) and to the use of the above-mentioned oxidation catalysts for the oxidation of alcohols.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: December 9, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Reinhard Sommerlade, Hansjörg Grützmacher, Souâd Boulmaâz
  • Process for the selective oxidation of alcohols using readily removable nitroxyl radicals
    Patent number: 6441243
    Abstract: The invention relates to a process for the selective oxidation of alcohols to ketones or to aldehydes by means of an alkali hypohalite under alkaline conditions, which comprises carrying out the oxidation in the presence of a heterogeneous oxidation catalyst that is insoluble in the reaction medium and is selected from the group comprising the compounds of formula (I) (III), wherein n is a number from 3 to 3000; or a 4-oxy-2,2,6,6-tetramethylpiperidin-1-oxyl that is 4-oxy-bound to a Merrifield polymer. The invention relates also to the compounds of formulae (II) and (III) and to the use of the above-mentioned oxidation catalysts for the oxidation of alcohols.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: August 27, 2002
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Reinhard Sommerlade, Hansjörg Grützmacher, Souâd Boulmaâz