Patents by Inventor Hans-Jörg Wölk

Hans-Jörg Wölk 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).

  • Publication number: 20090325794
    Abstract: The present invention relates to a process for the preparation of nanocrystalline metal oxide particles comprising the steps of a) the introduction of a starting compound into a reaction chamber by means of a carrier fluid, b) the subjecting of the starting compound in a treatment zone to a pulsating thermal treatment, c) the forming of nanocrystalline metal oxide particles, d) the removal of the nanocrystalline metal oxide particles obtained in steps b) and c) from the reactor, wherein the starting compound is introduced into the reaction chamber in the form of a solution, slurry, suspension or in solid aggregate state. Further, the present compound relates to a catalyst material, obtainable by the process according to the invention, in particular a catalyst material for use in the preparation of methanol from carbon monoxide and hydrogen.
    Type: Application
    Filed: July 11, 2007
    Publication date: December 31, 2009
    Inventors: Hans Jörg Wölk, Götz Burgfels, Sigrun Polier, Gernot Polier, Astrid Polier
  • Patent number: 7598410
    Abstract: The invention relates to a method for the production of monomer organic carbonates from a mixture of organic carbonates and carbamates which are obtained by reacting urea, substituted urea, a salt or ester of carbamide acid or one of the N-substituted derivatives thereof with a polyalkylene glycol, polyester-polyol or a polyether-polyol of general formula (I), wherein R represents a linear or branched alkylene group having 2-12 carbon atoms and n represents a number between 2 and 20, or with a completely or partially hydrolysed polyvinyl alcohol of general formula (II), wherein R? represents an alkyl group, an aryl group or an acyl group having 1-12 carbon atoms, p and q represent a number between 120, or with mixtures of said compounds in the presence of a catalyst facilitating the separation of ammonia and the ammonia becomes free or the amine is removed from the reaction mixture by means of a strip gas, whereby said mixture is reacted with an alcohol or a phenol whereby monomer carbonates are formed and po
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: October 6, 2009
    Assignee: Lurgi GmbH
    Inventors: Henning Buchold, Jürgen Eberhardt, Ulrich Wagner, Hans-Jörg Wölk
  • Patent number: 7589227
    Abstract: The invention relates to a method for the production of monomer organic carbonates, wherein urea, substituted urea, a salt or an ester of carbamide acid or one of the N-substituted derivatives thereof is reacted in a first step in a polyalkylene glycol, a polyester-polyol or a polyether-polyol of general formula (I), wherein R represents a linear or branched alkylene group having 2-12 carbon atoms and n is a number between (2) and (20), or in a completely or partially hydrolysed polyvinyl alcohol of general formula (II) wherein R? represents an alkyl group, an aryl group or an acyl group having 1-12 carbon atoms, p and q are numbers between 1 and 20, or in mixtures of said compounds in the presence of a catalyst facilitating the separation of ammonia in order to form a mixture containing carbonates and carbamates, the ammonia becomes free or the amine is removed form the reaction mixture by means of a strip gas.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: September 15, 2009
    Assignee: Lurgi GmbH
    Inventors: Henning Buchold, Jürgen Eberhardt, Ulrich Wagner, Hans-Jörg Wölk