Patents by Inventor Take Constantinescu

Take Constantinescu 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).

  • Catalyst and hydrogenation of carbonyl compounds in the liquid phase using the catalyst
    Patent number: 7214641
    Abstract: The present invention provides a process for hydrogenating carbonyl compounds, in particular C4-dicarboxylic acids to mixtures of tetrahydrofuran and gamma-butyrolactone, over supported rhenium catalysts, wherein rhenium and at least one further metal of groups VIII or Ib of the Periodic Table of the Elements, in particular ruthenium (Ru), rhodium (Rh), palladium (Pd), osmium (Os), iridium (Ir), platinum (Pt), copper (Cu), silver (Ag) or cobalt (Co), is applied to the support in the form of at least one bimetallic precursor compound, and also to these catalysts.
    Type: Grant
    Filed: November 6, 2003
    Date of Patent: May 8, 2007
    Assignee: BASF Aktiengesellschaft
    Inventors: Markus Schubert, Michael Hesse, Rolf-Hartmuth Fischer, Take Constantinescu
  • Supported catalyst containing rhenium and method for hydrogenation of hydrogenation of carbonyl compounds in liquid phase by means of said catalyst
    Publication number: 20060052239
    Abstract: The present invention provides a process for hydrogenating carbonyl compounds, in particular C4-dicarboxylic acids to mixtures of tetrahydrofuran and gamma-butyrolactone, over supported rhenium catalysts, wherein rhenium and at least one further metal of groups VIII or Ib of the Periodic Table of the Elements, in particular ruthenium (Ru), rhodium (Rh), palladium (Pd), osmium (Os), iridium (Ir), platinum (Pt), copper (Cu), silver (Ag) or cobalt (Co), is applied to the support in the form of at least one bimetallic precursor compound, and also to these catalysts.
    Type: Application
    Filed: November 6, 2003
    Publication date: March 9, 2006
    Applicant: BSF AKTIENGESELLSCHAFT
    Inventors: Markus Schubert, Michael Hesse, Rolf-Hartmuth Fischer, Take Constantinescu
  • Process to afford gamma butyrolactone and tetrahydrofuran
    Patent number: 6433193
    Abstract: A process for production of tetrahydrofuran and gamma butyrolactone by hydrogenation of maleic anhydride recovered from a process of conversion of a n-butane.
    Type: Grant
    Filed: August 1, 2001
    Date of Patent: August 13, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Aldo Bertola, Take Constantinescu, Philippe Raucq, Salvatore Cassarino