Patents by Inventor Jurgen Szameitat

Jurgen Szameitat 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: 6482972
    Abstract: Mixtures of isomeric nonanols and decanols are obtained by joint aldol condensation of n-butanal and pentanals, and up to 1% by weight of 3-methylbutanal, hydrogenation of the aldol condensation product to the corresponding saturated alcohols, and separation from the reaction mixture of the components boiling at temperatures lower than those of the nonanols and decanols. The pentanals are mixtures of 60 to 90% by weight of n-pentanal and 10 to 40% by weight of 2-methylbutanal. The alcohol mixture is especially suitable for preparing ester plasticizers.
    Type: Grant
    Filed: May 8, 1995
    Date of Patent: November 19, 2002
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Helmut Bahrmann, Wilfried Fenske, Wolfgang Greb, Peter Heymanns, Peter Lappe, Thomas Müller, Jürgen Szameitat, Ernst Wiebus
  • Publication number: 20020133047
    Abstract: Mixtures of isomeric nonanols and decanols are obtained by joint aldol condensation of n-butanal and pentanals, and up to 1% by weight of 3-methylbutanal, hydrogenation of the aldol condensation product to the corresponding saturated alcohols, and separation from the reaction mixture of the components boiling at temperatures lower than those of the nonanols and decanols. The pentanals are mixtures of 60 to 90% by weight of n-pentanal and 10 to 40% by weight of 2-methylbutanal. The alcohol mixture is especially suitable for preparing ester plasticizers.
    Type: Application
    Filed: December 13, 2001
    Publication date: September 19, 2002
    Inventors: Helmut Bahrmann, Wilfried Fenske, Wolfgang Greb, Peter Heymanns, Peter Lappe, Thomas Muller, Jurgen Szameitat, Ernst Wiebus
  • Patent number: 6051743
    Abstract: For the preparation of predominantly unbranched higher primary alcohols, olefins from the Fischer-Tropsch synthesis are reacted with hydrogen and carbon monoxide in the presence of water and a catalyst which is rhodium, in metallic form or as a compound, and a water-soluble phosphine. The reaction product obtained is hydrogenated. The water-soluble phosphines employed are compounds whose anion is a phosphine containing at least one sulfonated or carboxylated aromatic radical and whose cation is a quaternary ammonium or phosphonium ion.
    Type: Grant
    Filed: December 7, 1993
    Date of Patent: April 18, 2000
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Helmut Bahrmann, Gregor Deckers, Wolfgang Greb, Peter Heymanns, Peter Lappe, Thomas Muller, Jurgen Szameitat, Ernst Wiebus
  • Patent number: 5661204
    Abstract: Mixtures of isomeric decyl alcohols obtained by oligomerization of propylene in the presence of deactivated zeolites as catalysts, followed by separation of the nine carbon olefins from the oligomer mixture, then hydroformylation of the 9 carbon olefins to 10 carbon aldehydes, and hydrogenation of the aldehydes to the corresponding alcohols. The mixtures, when esterified with phthalic acid, or anhydride, provide a mixture of isomeric di-decyl phthalates that can be used as plasticizers.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 26, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Helmut Bahrmann, Wolfgang Greb, Peter Heymanns, Peter Lappe, Thomas Muller, Jurgen Szameitat, Ernst Wiebus
  • Patent number: 5516948
    Abstract: Mixtures of isomeric decyl alcohols obtained by oligomerization of propylene in the presence of deactivated zeolites as catalysts, followed by separation of the nine carbon olefins from the oligomer mixture, then hydroformylation of the 9 carbon olefins to 10 carbon aldehydes, and hydrogenation of the aldehydes to the corresponding alcohols. The mixtures, when esterified with phthalic acid, or anhydride, provide a mixture of isomeric di-decyl phthalates that can be used as plasticizers.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 14, 1996
    Assignee: Hoechst AG
    Inventors: Helmut Bahrmann, Wolfgang Greb, Peter Heymanns, Peter Lappe, Thomas Muller, Jurgen Szameitat, Ernst Wiebus
  • Patent number: 5462986
    Abstract: Mixtures of isomeric decyl alcohols prepared by hydroformylation of mixtures of butene-1 and butene-2 in two stages to give aldehyde mixtures, and condensation of the aldehyde mixtures to form an aldol mixture, followed by separation and hydrogenation. The first stage of the hydroformylation proceeds in the presence of rhodium catalysts dissolved in water, the second stage in the presence of cobalt catalysts homogeneously dissolved in the reaction medium. The mixture of isomeric decyl alcohols, when esterified with phthalic acid, yields a mixture of isomeric decyl phthalates which are useful as plasticizers.
    Type: Grant
    Filed: February 14, 1995
    Date of Patent: October 31, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Helmut Bahrmann, Wolfgana Greb, Peter Heymanns, Peter Lappe, Thomas Muller, Jurgen Szameitat, Ernst Wiebus
  • Patent number: 5463147
    Abstract: Mixtures of isomeric decyl alcohols prepared by hydroformylation of mixtures of butene-1 and butene-2 in two stages to give aldehyde mixtures, and condensation of the aldehyde mixtures to form an aldol mixture, followed by separation and hydrogenation. The first stage of the hydroformylation proceeds in the presence of rhodium catalysts dissolved in water, the second stage in the presence of cobalt catalysts homogeneously dissolved in the reaction medium. The mixture of isomeric decyl alcohols, when esterified with phthalic acid, yields a mixture of isomeric decyl phthalates which are useful as plasticizers.
    Type: Grant
    Filed: September 23, 1994
    Date of Patent: October 31, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Helmut Bahrmann, Wolfgang Greb, Peter Heymanns, Peter Lappe, Thomas Muller, Jurgen Szameitat, Ernst Wiebus
  • Patent number: 5382716
    Abstract: Mixtures of isomeric decyl alcohols obtained by hydroformylation of butadiene to produce aldehyde mixtures, condensation of the aldehyde mixtures, isolated from the reaction product, to form an aldol mixture, and isolation and hydrogenation of the aldol mixture. The mixture of isomeric decyl alcohols, esterified using phthalic acid, gives a mixture of isomeric decyl phthalates which are plasticizers having excellent cold properties.
    Type: Grant
    Filed: March 23, 1993
    Date of Patent: January 17, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Helmut Bahrmann, Wolfgang Greb, Peter Heymanns, Peter Lappe, Jurgen Szameitat, Thomas Muller, Ernst Wiebus
  • Patent number: 5369162
    Abstract: Mixtures of isomeric decyl alcohols are obtained by hydroformylation of 1-butene- and 2-butene-containing mixtures in two stages to give aldehyde mixtures, condensation of the isolated and combined aldehyde mixtures to form an aldol mixture, and isolation and hydrogenation of the aldol mixture. The mixture of isomeric decyl alcohols, esterified with phthalic acid, gives a mixture of isomeric decyl phthalates which are useful as plasticizers.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: November 29, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Helmut Bahrmann, Wolfgang Greb, Peter Lappe, Peter Heymanns, Jurgen Szameitat, Thomas Muller, Ernst Wiebus
  • Patent number: 5268514
    Abstract: Mixtures of isomeric decyl alcohols are obtained by hydroformylation of 1-butene- and 2-butene-containing mixtures in two stages to give aldehyde mixtures, condensation of the isolated and combined aldehyde mixtures to form an aldol mixture, and isolation and hydrogenation of the aldol mixture. The mixture of isomeric decyl alcohols, esterified with phthalic acid, gives a mixture of isomeric decyl phthalates which are useful as plasticizers.
    Type: Grant
    Filed: March 22, 1993
    Date of Patent: December 7, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Helmut Bahrmann, Wolfgang Greb, Peter Lappe, Peter Heymanns, Jurgen Szameitat, Thomas Muller, Ernst Wiebus