Patents by Inventor Hans-Gerd Lüken

Hans-Gerd Lüken 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: 20120172624
    Abstract: The invention relates to a process for preparing a mixture of isomeric decane-carboxylic acids, which comprises the following steps: a) hydroformylation of a hydrocarbon mixture containing linear C4-olefins using a rhodium-containing catalyst system; b) aldol condensation of a mixture of aliphatic C5-aldehydes obtained from step a); c) selective hydrogenation of the mixture of unsaturated C10-aldehydes from step b) to aliphatic C10-aldehydes; d) uncatalysed oxidation of the mixture of aliphatic C10-aldehydes from step c) to give a mixture having a proportion of at least 70% by mass of 2-propylheptanoic acid, based on the total content of isomeric decanecarboxylic acids.
    Type: Application
    Filed: May 25, 2010
    Publication date: July 5, 2012
    Applicant: Evonik Oxeno GmbH
    Inventors: Michael Grass, Alfred Kaizik, Hans-Gerd Lueken, Wilfried Bueschken
  • Publication number: 20120136186
    Abstract: The invention relates to a method for producing low-odor n-butane by catalytic hydrogenation of a feed mixture. The aim of the invention is to provide such a method, wherein the feed material, in addition to n-butane, n-butene and up to 1 mass % formic acid and/or up to 1 mass % pentanals and/or up to 0.5 mass % pentanols, also comprises carbon monoxide. The aim is achieved by treating the feed mixture in the temperature range of 15 to 120° C. with an aqueous solution of an alkali metal or alkaline earth metal hydroxide in the concentration range of 0.5 to 30 mass % and subsequently subjecting the feed mixture to the catalytic hydrogenation.
    Type: Application
    Filed: May 21, 2010
    Publication date: May 31, 2012
    Applicant: EVONIK OXENO GMBH
    Inventors: Hans-Gerd Lueken, Alfred Kaizik, Markus Winterberg, Wilfried Büschken, Drik Fridag
  • Publication number: 20120123169
    Abstract: The invention relates to a method for continuously producing ?,?-unsaturated C10-aldehydes from aliphatic C5-aldehydes, comprising the following steps: aldol-condensing aliphatic C5-aldehydes into ?,?-unsaturated C10-aldehydes in the presence of an aqueous base in a tube reactor; phase separating the output of the tube reactor into an aqueous catalyst phase and an organic product phase; separating the organic product phase into ?,?-unsaturated C10-aldehydes, aliphatic C5-aldehydes, and auxiliary products; discharging a part of the aqueous catalyst phase to remove the reaction water and supplementing said part with liquor solution and subsequently returning said part to the tube reactor. The task of the invention is to improve a method of said kind in a way such that it requires lower energy input. This is achieved in that the aliphatic C5-aldehydes and/or the ?,?-unsaturated C10-aldehydes are dispersed in the aqueous base as drops, wherein the average Sauter diameter of the drops is between 0.2 mm and 2 mm.
    Type: Application
    Filed: February 23, 2010
    Publication date: May 17, 2012
    Applicant: Evonik Oxeno GmbH
    Inventors: Alfred Kaizik, Dirk Fridag, Hans-Gerd Lueken, Wilfried Bueschken
  • Patent number: 8138379
    Abstract: The invention relates to a one-stage continuous process for hydroformylating olefins having at least 5 carbon atoms to the corresponding aldehydes and/or alcohols having at least 6 carbon atoms in the presence of unmodified cobalt catalysts in a process in which, in the presence of an aqueous phase and of an organic phase, catalyst formation, catalyst extraction and hydroformylation proceed in the same reactor, which is characterized in that more aqueous cobalt salt solution is fed into the reactor as an aqueous phase with the liquid reaction mixture and is discharged from the reactor with the gas phase, and in that the level of the aqueous bottom phase is kept constant by continuously conducting a portion of the aqueous bottom phase out of the reactor.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: March 20, 2012
    Assignee: Evonik Oxeno GmbH
    Inventors: Hans-Gerd Lueken, Stefan Drees, Alfred Kaizik, Wilfried Bueschken
  • Patent number: 8129571
    Abstract: The invention relates to a process for the continuous preparation of aldehydes and/or alcohols having at least 6 carbon atoms by multistage hydroformylation of olefins or olefin mixtures having at least 5 carbon atoms in the presence of unmodified cobalt complexes, in which at least two reactors are operated at different temperatures in the temperature range from 100 to 220° C. and pressures of from 100 to 400 bar, which is characterized in that a) one reactor is operated at temperatures above 160° C.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: March 6, 2012
    Assignee: Evonik Oxeno GmbH
    Inventors: Hans-Gerd Lueken, Alfred Kaizik, Stefan Drees, Wilfried Bueschken
  • Publication number: 20120046503
    Abstract: The invention relates to a method for enriching a homogenous catalyst from a process flow comprising said homogenous catalyst as a component, wherein the process flow is conducted over at least one membrane and wherein the membrane wholly or partially comprises a polymer that has planar polymer units connected to one another via a rigid link and wherein the linker is contorted, such that at least one planar polymer unit is connected to at least one second planar polymer unit via the link, in a non-co-planar arrangement. The invention furthermore relates to a method for producing tridecanal.
    Type: Application
    Filed: February 23, 2010
    Publication date: February 23, 2012
    Applicant: Evonik Oxeno GmbH
    Inventors: Markus Priske, Goetz Baumgarten, Hans-Gerd Lueken, Alfred Kaizik, Klaus-Diether Wiese, Uwe Ernst, Patrick Muhlack
  • 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
  • Publication number: 20110130595
    Abstract: A process for preparing a C5 aldehyde mixture from a hydrocarbon mixture comprising at least one linear butene by terminal hydroformylation under isomerizing conditions, using a catalyst system comprising rhodium, a bisphosphite ligand, and an amine.
    Type: Application
    Filed: April 28, 2009
    Publication date: June 2, 2011
    Applicant: Evonik Oxeno GmbH
    Inventors: Hans-Gerd Lueken, Dirk Fridag, Udo Lenz, Hermann-Josef Schulte-Althoff, Klaus-Diether Wiese, Alfred Kaizik, Patrick Muhlack, Wilfried Bueschken, Frank Hoeper
  • Publication number: 20110060169
    Abstract: The invention relates to a hydrogenation catalyst which comprises a support material and at least one hydrogenation-active metal and in which the support material is based on titanium dioxide, zirconium dioxide, aluminium oxide, silicon oxide or mixed oxides thereof and the hydrogenation-active metal is at least one element from the group consisting of copper, cobalt, nickel, chromium, wherein the support material contains the element barium. The invention further relates to a process for preparing alcohols by hydrogenation of carbonyl compounds, in which the hydrogenation is carried out in the presence of such a hydrogenation catalyst.
    Type: Application
    Filed: July 7, 2008
    Publication date: March 10, 2011
    Applicant: Evonik Oxeno GmbH
    Inventors: Alfred Kaizik, Thomas Quandt, Hans-Gerd Lueken, Wilfried Bueschken
  • Publication number: 20100249464
    Abstract: The invention relates to a one-stage continuous process for hydroformylating olefins having at least 5 carbon atoms to the corresponding aldehydes and/or alcohols having at least 6 carbon atoms in the presence of unmodified cobalt catalysts in a process in which, in the presence of an aqueous phase and of an organic phase, catalyst formation, catalyst extraction and hydroformylation proceed in the same reactor, which is characterized in that more aqueous cobalt salt solution is fed into the reactor as an aqueous phase with the liquid reaction mixture and is discharged from the reactor with the gas phase, and in that the level of the aqueous bottom phase is kept constant by continuously conducting a portion of the aqueous bottom phase out of the reactor.
    Type: Application
    Filed: October 28, 2008
    Publication date: September 30, 2010
    Applicant: Evonik Oxeno GmbH
    Inventors: Hans-Gerd Lueken, Stefan Drees, Alfred Kaizik, Wilfried Bueschken
  • Publication number: 20100210880
    Abstract: The invention relates to a process for the continuous preparation of aldehydes and/or alcohols having at least 6 carbon atoms by multistage hydroformylation of olefins or olefin mixtures having at least 5 carbon atoms in the presence of unmodified cobalt complexes, in which at least two reactors are operated at different temperatures in the temperature range from 100 to 220° C. and pressures of from 100 to 400 bar, which is characterized in that a) one reactor is operated at temperatures above 160° C.
    Type: Application
    Filed: October 28, 2008
    Publication date: August 19, 2010
    Applicant: Evonik Oxeno GmbH
    Inventors: Hans-Gerd Lueken, Alfred Kaizik, Stefan Drees, Wilfried Bueschken
  • Publication number: 20090301348
    Abstract: The present invention relates to a mixture comprising diesters of the formula (I) where R1 to R8?H or alkyl group having from 1 to 6 carbon atoms, where the R1 to R8 radicals may be the same or different, which is characterized in that at least two different diesters I are present in the mixture, said diesters differing in the structure of at least one of the carboxylic acid radicals C8H17COO present, to a process for preparing diesters of an isosorbide derivative of the formula I, in which a hexahydric alcohol and/or a monoanhydro or dianhydro derivative of the alcohol is esterified with a mixture of at least two different carboxylic acids of the empirical formula C8H17COOH, and to the use of these mixtures in paints, inks or coatings, in plastisols, adhesives or adhesive components, in sealants, as plasticizers in polymers or polymer components, as solvents, as lubricant oil components and as assistants in metal processing, and also PVC compositions or plastisols comprising PVC and from 5 to 250 parts by ma
    Type: Application
    Filed: December 21, 2007
    Publication date: December 10, 2009
    Applicant: Evonik Oxeno GmbH
    Inventors: Michael Grass, Norbert Scholz, Alfred Kaizik, Wilfried Bueschken, Hans-Gerd Lueken
  • 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
  • Patent number: 7179947
    Abstract: A process for the catalytic hydroformylation of olefins having from 6 to 24 carbon atoms, in which the hydroformylation is carried out in one or more stage(s) and a mixture comprising at least one olefin and an aldehyde in a molar ratio of aldehyde to olefin of from 0.005:1 to 0.2:1 is used as feed in at least one of these stages which is carried out in the presence of an unmodified cobalt complex as catalyst.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: February 20, 2007
    Assignee: Oxeno Olefinchemie GmbH
    Inventors: Hans-Gerd Lueken, Alfred Kaizik, Stefan Drees, Wilfried Bueschken, Wilhelm Droste
  • Patent number: 7154012
    Abstract: A process for preparing aliphatic alcohols that includes cobalt-catalyzed hydroformylation of olefins, treatment of a hydroformylation mixture with oxygen-containing gases in the presence of acidic, aqueous cobalt(II) salt solutions, separation of a mixture into an aqueous phase comprising cobalt salts and an organic phase comprising the aliphatic aldehydes, and hydrogenation of an aldehyde-containing organic phase wherein the organic phase and treatment with an adsorbent to separate off cobalt compounds prior to hydrogenation.
    Type: Grant
    Filed: December 8, 2005
    Date of Patent: December 26, 2006
    Assignee: Degussa AG
    Inventors: Hans-Gerd Lueken, Alfred Kaizik, Wilfried Bueschken, Andreas Stenert
  • Publication number: 20060129004
    Abstract: A process for preparing aliphatic alcohols that includes cobalt-catalyzed hydroformylation of olefins, treatment of a hydroformylation mixture with oxygen-containing gases in the presence of acidic, aqueous cobalt(II) salt solutions, separation of a mixture into an aqueous phase comprising cobalt salts and an organic phase comprising the aliphatic aldehydes, and hydrogenation of an aldehyde-containing organic phase wherein the organic phase and treatment with an adsorbent to separate off cobalt compounds prior to hydrogenation.
    Type: Application
    Filed: December 8, 2005
    Publication date: June 15, 2006
    Applicant: DEGUSSA AG
    Inventors: Hans-Gerd Lueken, Alred Kaizik, Wilfried Bueschken, Andreas Stenert
  • Publication number: 20060128998
    Abstract: A process for the catalytic hydroformylation of olefins having from 6 to 24 carbon atoms, in which the hydroformylation is carried out in one or more stage(s) and a mixture comprising at least one olefin and an aldehyde in a molar ratio of aldehyde to olefin of from 0.005:1 to 0.2:1 is used as feed in at least one of these stages which is carried out in the presence of an unmodified cobalt complex as catalyst.
    Type: Application
    Filed: December 2, 2005
    Publication date: June 15, 2006
    Applicant: DEGUSSA AG
    Inventors: Hans-Gerd Lueken, Alfred Kaizik, Stefan Drees, Wilfried Bueschken, Wilhelm Droste
  • Patent number: 4968849
    Abstract: A process for preparing 2-ethylhexanol by the liquid-phase catalytic hydrogenation of 2-ethylhexenal and a catalyst for preforming this catalytic hydrogenation are disclosed.
    Type: Grant
    Filed: December 2, 1988
    Date of Patent: November 6, 1990
    Assignee: Huels Aktiengesellschaft
    Inventors: Hans-Gerd Lueken, Uwe Tanger, Wilhelm Droste, Gernard Ludwig, Dietmar Gubisch