Patents by Inventor Hans-Gerd Luken

Hans-Gerd Luken 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).

  • Method for separation and partial return of rhodium and catalytically effective complex compounds thereof from process streams
    Patent number: 8748643
    Abstract: The invention relates to a method for separating and partially returning transition metals and/or catalytically effective complex compounds thereof from a reaction mixture by combining one at least one-stage membrane separation and an adsorption, wherein a current comprising a catalyst, comprising a transition metal, is divided over at least one one-stage membrane separation step in a transition metal enriched retentate stream that resupplies the reaction mixture and a transition metal depleted permeate stream and the transition metal depleted permeate stream is further supplied to an adsorption step. The invention further relates to a method for producing tridecanals.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: June 10, 2014
    Assignee: Evonik Oxeno GmbH
    Inventors: Markus Priske, Götz Baumgarten, Alfred Kaizik, Hans-Gerd Lüken
  • METHOD FOR SEPARATION AND PARTIAL RETURN OF RHODIUM AND CATALYTICALLY EFFECTIVE COMPLEX COMPOUNDS THEREOF FROM PROCESS STREAMS
    Publication number: 20120035382
    Abstract: The invention relates to a method for separating and partially returning transition metals and/or catalytically effective complex compounds thereof from a reaction mixture by combining one at least one-stage membrane separation and an adsorption, wherein a current comprising a catalyst, comprising a transition metal, is divided over at least one one-stage membrane separation step in a transition metal enriched retentate stream that resupplies the reaction mixture and a transition metal depleted permeate stream and the transition metal depleted permeate stream is further supplied to an adsorption step. The invention further relates to a method for producing tridecanals.
    Type: Application
    Filed: February 25, 2010
    Publication date: February 9, 2012
    Applicant: Evonik Oxeno GmbH
    Inventors: Markus Priske, Götz Baumgarten, Alfred Kaizik, Hans-Gerd Lüken
  • Process for the hydrogenation of oxo aldehydes having high ester contents
    Patent number: 7524997
    Abstract: A hydrogenation catalyst is used for the catalytic hydrogenation of an ester-containing aldehyde mixture and the catalyst contains a ?-alumina having a BET surface area of from 70 to 350 m2/g as support material, and at least one component having hydrogenation activity and being selected from the group consisting of nickel, cobalt and mixtures thereof.
    Type: Grant
    Filed: July 28, 2006
    Date of Patent: April 28, 2009
    Assignee: OXENO Olefinchemie GmbH
    Inventors: Alfred Kaizik, Hans-Gerd Lüken, Michael Grass, Dietrich Maschmeyer, Wilfried Büschken
  • Process for the hydrogenation of oxo aldehydes having high ester contents
    Publication number: 20070027346
    Abstract: A hydrogenation catalyst is used for the catalytic hydrogenation of an ester-containing aldehyde mixture and the catalyst contains a ?-alumina having a BET surface area of from 70 to 350 m2/g as support material, and at least one component having hydrogenation activity and being selected from the group consisting of nickel, cobalt and mixtures thereof.
    Type: Application
    Filed: July 28, 2006
    Publication date: February 1, 2007
    Applicant: Degussa AG
    Inventors: Alfred Kaizik, Hans-Gerd Luken, Michael Grass, Dietrich Maschmeyer, Wilfried Buschken
  • Nickel/aluminum oxide catalyst, preparation thereof, use thereof and hydrogenation of aromatic hydrocarbons with the aid of the catalyst
    Patent number: 5478791
    Abstract: A nickel/aluminum oxide catalyst having a nickel content from 10 to 60% by weight, based on the total catalyst, in which the nickel is in the form of crystallites having an average diameter ranging from 15 nm to 50 nm.
    Type: Grant
    Filed: April 1, 1994
    Date of Patent: December 26, 1995
    Assignee: Huels Aktiengesellschaft
    Inventors: Wolfgang Baldauf, Martin Rupp, Heinz Bolz, Hans-Gerd Luken, Joachim Schuler, Bernd Nowitzki