Patents by Inventor Harald Mei?ner

Harald Mei?ner 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).

  • Patent number: 8933223
    Abstract: A process for preparing a cyclic tertiary amine of the formula I where A is a C4-alkylene group, a C5-alkylene group or a —(CH2)2—B—(CH2)2— group, where B is oxygen (O) or an N—R1 radical and R1 is C1-C5-alkyl, aryl or C5-C7-cycloalkyl, and the radical R2 is a linear or branched C2-C16-alkyl, C5-C7-cycloalkyl or C7-C20-aralkyl, in which (i) an amino alcohol II from the group consisting of 1,4-aminobutanol, 1,5-aminopentanol, aminodiglycol (ADG) and aminoethylethanolamine of the formula IIa where R1 is as defined above or hydrogen (H), in which case R1=R2 in the amine I, is reacted with a primary or secondary alcohol R2OH (III) at a temperature in the range from 150 to 270° C. in the liquid phase in the presence of a copper-comprising heterogeneous catalyst in a reactor.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: January 13, 2015
    Assignee: BASF SE
    Inventors: Christof Wilhelm Wigbers, Johann-Peter Melder, Bernd Stein, Harald Meiβner
  • Patent number: 8759580
    Abstract: The invention relates to a process for preparing aminoalkanamides by reacting cyanoalkanoic esters with a) ammonia or an amine and b) hydrogen in the presence of a catalyst, the reaction with component b) being started simultaneously or not later than a maximum of 100 minutes after commencement of the reaction of the cyanoalkanoic ester with component a).
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: June 24, 2014
    Assignee: BASF SE
    Inventors: Martin Ernst, Andreas Kusche, Gunnar Heydrich, Horst Grafmans, Holger Evers, Johann-Peter Melder, Harald Meiβner, Torsten Freund
  • Patent number: 8637668
    Abstract: Process for preparing a cyclic tertiary methylamine of the formula I where A is a C4-alkylene group, a C5-alkylene group or a —(CH2)2—B—(CH2)2— group, where B is oxygen (O) or an N—R1 radical and R1 is C1-C5-alkyl, aryl or C5-C7-cycloalkyl, wherein an amino alcohol II from the group consisting of 1,4-aminobutanol, 1,5-aminopentanol, aminodiglycol (ADG) or aminoethylethanolamine of the formula IIa where R1 is as defined above or is hydrogen (H), in which case R1?CH3 in the amine I, is reacted with methanol in a reactor at a temperature in the range from 150 to 270° C. in the liquid phase in the presence of a copper-comprising heterogeneous catalyst.
    Type: Grant
    Filed: June 13, 2011
    Date of Patent: January 28, 2014
    Assignee: BASF SE
    Inventors: Christof Wilhelm Wigbers, Johann-Peter Melder, Bernd Stein, Harald Meiβner
  • Patent number: 8034978
    Abstract: Process for preparing an amine by reacting an aldehyde and/or ketone with hydrogen and a nitrogen compound selected from the group consisting of primary and secondary amines in the presence of a heterogeneous catalyst, wherein the reaction is carried out using a suspended catalyst as heterogeneous catalyst and is carried out in the semibatch mode in which the nitrogen compound as one reactant is placed in the reaction vessel and the aldehyde and/or the ketone as the other reactant is added during the course of the reaction and the aldehyde and/or the ketone is added in portions or continuously to the reaction mixture during the course of the reaction as a function of the achieved conversion of the nitrogen compound until a conversion of the nitrogen compound of at least 95% results, and all or part of the catalyst remains in the reaction vessel after the reaction batch and is reused for the next reaction batch.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: October 11, 2011
    Assignee: BASF SE
    Inventors: Jan Eberhardt, Harald Meiβner, Bram Willem Hoffer, Johann-Peter Melder, Ekkehard Schwab