Patents by Inventor Klaus Joachim Mueller-Engel

Klaus Joachim Mueller-Engel 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).

  • Heterogeneously catalyzed gas-phase partial oxidation of acrolein to acrylic acid
    Publication number: 20040062870
    Abstract: A process for the heterogeneously catalyzed gas-phase partial oxidation of acrolein to acrylic acid over a multimetal oxide material having a specific structure, which contains the elements Mo and V, at least one of the elements Te and Sb and at least one of the elements from the group consisting of Nb, Ta, W and Ti and is doped with promoter elements, is described.
    Type: Application
    Filed: September 23, 2003
    Publication date: April 1, 2004
    Applicant: BASF Aktiengesellschaft
    Inventors: Martin Dieterle, Frieder Borgmeier, Klaus Joachim Mueller-Engel, Hartmut Hibst
  • Heterogeneously catalyzed gas-phase partial oxidation of at least one organic compound
    Publication number: 20040015013
    Abstract: A process for the heterogeneously catalyzed gas-phase partial oxidation of an organic compound over a fixed catalyst bed present in a fixed-bed reactor having a plurality of catalyst tubes, in which the reduction of the quality of the catalyst load with increasing duration of operation is restored by a partial catalyst change, is described.
    Type: Application
    Filed: June 13, 2003
    Publication date: January 22, 2004
    Applicant: BASF Aktiengesellschaft
    Inventors: Ulrich Hammon, Jochen Petzoldt, Klaus Joachim Mueller-Engel, Martin Dieterle
  • Method for purifying acrylic acid and methacrylic acid
    Patent number: 6596901
    Abstract: A process for preparing acrylic acid or methacrylic acid comprises (a) preparing a gaseous product mixture having essentially the composition of a reaction mixture of the catalytic gas phase oxidation of C3-/C4-alkanes, -alkenes, -alkanols and/or -alkanals and/or precursors thereof to form acrylic acid or methacrylic acid, characterized by (b) condensing said product mixture, (c) crystallizing acrylic acid or methacrylic acid from the solution obtained in step (b), and (d) removing the resulting crystals from the mother liquor.
    Type: Grant
    Filed: January 8, 1999
    Date of Patent: July 22, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernd Eck, Otto Machhammer, Theo Proll, Volker Schliephake, Klaus Joachim Müller-Engel
  • Method for stabilizing chemical compounds containing at least one ethylenically unsaturated bond in order to prevent undesirable radical polymerization
    Patent number: 6518453
    Abstract: In a process for stabilizing chemical compounds having at least one ethylenically unsaturated bond to undesired free radical polymerization, a nitroxyl radical and a chemical compound containing phosphorus in chemically bonded form are added to the unsaturated compound present as pure substance or as a component of a mixture.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: February 11, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinz Friedrich Sutoris, Gerhard Wagenblast, Volker Schliephake, Jürgen Schröder, Klaus Joachim Müller-Engel, Harald Keller, Thomas Jaworek
  • Method for producing acrylic acid
    Patent number: 6498272
    Abstract: In a process for the preparation of acrylic acid, a product gas mixture obtained by catalytic gas-phase oxidation of a C3-precursor of acrylic acid and containing acrylic acid is directly cooled with a quench liquid and then subjected to fractional condensation in a separation column provided with baffles, said product gas mixture ascending into itself and a crude acrylic acid being removed via a side take-off, and the acrylic acid oligomers formed are cleaved and recycled.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: December 24, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Jürgen Schröder, Gerhard Nestler, Klaus Joachim Müller-Engel
  • Method for storing and/or transporting pure acrylic acid
    Patent number: 6455732
    Abstract: Pure acrylic acid is stored and/or transported by a process in which the pure acrylic acid is stored and/or transported as liquid aqueous solution at ≦15° C.
    Type: Grant
    Filed: April 21, 2000
    Date of Patent: September 24, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinrich Aichinger, Klaus Joachim Müller-Engel, Gerhard Nestler, Jürgen Schröder
  • Method for producing acrolein by heterogeneous catalytic gas-phase partial oxidation of propene
    Patent number: 6410785
    Abstract: In a process for the preparation of acrolein by gas-phase partial oxidation under heterogeneous catalysis, a reaction gas starting mixture which contains propene and molecular oxygen in a molar C3H6:O2 ratio of >1 is reacted in reaction zones connected in series, at elevated temperatures, over solid-state catalysts, further molecular oxygen being added to the reaction gas mixture in the course of the partial oxidation.
    Type: Grant
    Filed: July 18, 2001
    Date of Patent: June 25, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Peter Zehner, Otto Machhammer, Heiko Arnold, Klaus Joachim Müller-Engel