Patents by Inventor Matthias Frauenkron

Matthias Frauenkron 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 preparation of pure triethylenediamine (TEDA)
    Patent number: 6552194
    Abstract: The invention relates to the preparation of pure triethylenediamine (TEDA) by evaporating TEDA from the mixture comprising a solvent or diluent, where the solvent or diluent has a boiling point at atmospheric pressure in the range from 175 to 250° C., passing the vapor-form TEDA into a liquid solvent, and subsequently crystallizing the TEDA out of the resultant solution.
    Type: Grant
    Filed: January 3, 2002
    Date of Patent: April 22, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Ortmund Lang, Bernd Rumpf, Matthias Frauenkron, Dirk Funhoff, Thomas Manderbach, Bernd Stein
  • Work-up of the mother liquor obtained in the preparation of high-purity triethylenediamine
    Publication number: 20030004349
    Abstract: In a process for the purification of triethylenediamine (TEDA) in which TEDA is vaporized and the gaseous TEDA is passed into a liquid solvent and is subsequently crystallized from this, the mother liquor obtained after the TEDA has been crystallized is extracted with an extractant which is immiscible or only slightly miscible with the solvent of the mother liquor and in which TEDA is readily soluble, and the TEDA-depleted mother liquor obtained after extraction and/or the TEDA-enriched extractant which has been used for the extraction are/is returned to the process.
    Type: Application
    Filed: May 6, 2002
    Publication date: January 2, 2003
    Inventors: Ortmund Lang, Bernd Rumpf, Matthias Frauenkron, Dirk Funhoff, Thomas Manderbach, Bernd Stein
  • Process for the preparation of pure triethylenediamine (TEDA)
    Publication number: 20020156278
    Abstract: The invention relates to the preparation of pure triethylenediamine (TEDA) by evaporating TEDA from the mixture comprising a solvent or diluent, where the solvent or diluent has a boiling point at atmospheric pressure in the range from 175 to 250° C., passing the vapor-form TEDA into a liquid solvent, and subsequently crystallizing the TEDA out of the resultant solution.
    Type: Application
    Filed: January 3, 2002
    Publication date: October 24, 2002
    Inventors: Ortmund Lang, Bernd Rumpf, Matthias Frauenkron, Dirk Funhoff, Thomas Manderbach, Bernd Stein
  • Process for the preparation of triethylenediamine (TEDA)
    Publication number: 20020107394
    Abstract: A process for the preparation of triethylenediamine (TEDA) by reaction of ethylenediamine (EDA) in the presence of a zeolite catalyst, wherein
    Type: Application
    Filed: June 26, 2001
    Publication date: August 8, 2002
    Inventors: Matthias Frauenkron, Bernd Stein
  • Preparation of 2-methyl-4-amino-5-aminomethylpyrimidine
    Publication number: 20020040141
    Abstract: 2-Methyl-4-amino-5-aminomethylpyrimidine of the formula 1 1
    Type: Application
    Filed: March 20, 2001
    Publication date: April 4, 2002
    Inventors: Hansgeorg Ernst, Matthias Frauenkron, Johann-Peter Melder, Frank Funke, Andreas Keller
  • Preparation of 2-methyl-4-amino-5-aminomethylpyrimidine
    Patent number: 6365740
    Abstract: 2-Methyl-4-amino-5-aminomethylpyrimidine of the formula 1 is prepared by reacting 2-methyl-4-amino-5-alkoxymethylpyrimidine of the formula 2 where R=C1-C6-alkyl, with ammonia in the presence of a catalyst.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: April 2, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Hansgeorg Ernst, Matthias Frauenkron, Johann-Peter Melder, Frank Funke, Andreas Keller