Patents by Inventor Dirk Röttger

Dirk Röttger 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).

  • Process for fine purification of 1-butenic streams
    Patent number: 7737318
    Abstract: The invention relates to a process for preparing 1-butenic fractions having less than 2000 ppm of isobutene in relation to 1-butene from technical mixtures of C4 hydrocarbons I which contain at least 1-butene and 2000 ppmw to 8% by mass of isobutene based on the 1-butene, with or without n-butane, isobutane and/or 2-butenes.
    Type: Grant
    Filed: December 14, 2006
    Date of Patent: June 15, 2010
    Assignee: Evonik Oxeno GmbH
    Inventors: Silvia Santiago-Fernandez, Armin Rix, Jochen Praefke, Dirk Roettger, Markus Winterberg, Wilfried Bueschken
  • PROCESS FOR FINE PURIFICATION OF 1-BUTENIC STREAMS
    Publication number: 20100144998
    Abstract: The invention relates to a process for preparing 1-butenic fractions having less than 2000 ppm of isobutene in relation to 1-butene from technical mixtures of C4 hydrocarbons I which contain at least 1-butene and 2000 ppmw to 8% by mass of isobutene based on the 1-butene, with or without n-butane, isobutane and/or 2-butenes.
    Type: Application
    Filed: February 12, 2010
    Publication date: June 10, 2010
    Applicant: OXENO OLEFINCHEMIE GMBH
    Inventors: Silvia SANTIAGO-FERNANDEZ, Armin RIX, Jochen PRAEFKE, Dirk ROETTGER, Markus WINTERBERG, Wilfried BUESCHKEN
  • Method for the telomerization of non-cyclic olefins
    Patent number: 7645914
    Abstract: Process for telomerizing noncyclic olefins having at least two conjugated double bonds with at least one nucleophile using a catalyst containing a metal of group 8, 9 or 10 of the Periodic Table of the Elements, wherein hydrogen is added via a hydrogen source to the process in at least one process step in the overall telomerization process.
    Type: Grant
    Filed: August 23, 2005
    Date of Patent: January 12, 2010
    Assignee: Evonik Oxeno GmbH
    Inventors: Cornelia Borgmann, Dirk Roettger, Dagmara Ortmann, Reiner Bukohl, Stephan Houbrechts, Franz Nierlich
  • METHOD FOR PRODUCING DIENES BY HYDRODIMERIZATION
    Publication number: 20090287032
    Abstract: The invention relates to a process for preparing substituted or unsubstituted 1,7-diolefins by hydrodimerizing non-cyclic olefins having at least two conjugated double bonds in the presence of a reducing agent and of a catalyst, wherein the catalyst used is a metal-carbene complex.
    Type: Application
    Filed: June 6, 2007
    Publication date: November 19, 2009
    Applicant: EVONIK DEGUSSA GMBH
    Inventors: Volker Brehme, Manfred Neumann, Frank Bauer, Elke Fiebig-Bauer, Franz Rudolf Bauer, Johanna Elisabeth Bauer, Dirk Roettger
  • Method for the telomerisation of non-cyclic olefins
    Patent number: 7541506
    Abstract: The invention relates to a process for the telomerization of acyclic olefins having at least two conjugated double bonds (I) or mixtures in which such olefins are present with nucleophiles (II) using a metal-carbene complex as catalyst.
    Type: Grant
    Filed: June 17, 2003
    Date of Patent: June 2, 2009
    Assignee: OXENO Olefinchemie GmbH
    Inventors: Dirk Roettger, Ralf Jackstell, Holger Klein, Matthias Beller
  • METHOD FOR THE TELOMERIZATION OF NON-CYCLIC OLEFINS
    Publication number: 20090054710
    Abstract: Process for telomerizing noncyclic olefins having at least two conjugated double bonds with at least one nucleophile using a catalyst containing a metal of group 8, 9 or 10 of the Periodic Table of the Elements, wherein the overall telomerization process has a process step of catalyst recycling, in which hydrogen is added via a hydrogen source to the mixture present in this process step.
    Type: Application
    Filed: August 23, 2005
    Publication date: February 26, 2009
    Applicant: OXENO OLEFINCHEMIE GMBH
    Inventors: Cornelia Borgmann, Dirk Roettger, Dagmara Ortmann, Reiner Bukohl, Stephan Houbrechts, Franz Nierlich
  • Method for producing butene oligomers and tert-butyl ethers from Cflows containing isobutene
    Patent number: 7473812
    Abstract: The invention relates to a process for preparing butene oligomers and tert-butyl ethers from C4 hydrocarbon streams, by converting the isobutene to butene oligomers and tert-butyl ethers and removing them from the C4 streams.
    Type: Grant
    Filed: December 3, 2003
    Date of Patent: January 6, 2009
    Assignee: OXENO Olefinchemie GmbH
    Inventors: Udo Peters, Dieter Reusch, Andreas Beckmann, Dirk Roettger, Jochen Praefke
  • Method for the production of 2,7-octadienyl derivatives
    Patent number: 7462745
    Abstract: Process for preparing 1-octa-2,7-dienyl derivatives by reacting a 1,3-butadiene-containing hydrocarbon mixture, in particular a C4 fraction from a cracker, with nucleophiles, in which acetylenically unsaturated compounds are removed from the starting hydrocarbon mixture by selective hydrogenation and a telomerization is subsequently carried out.
    Type: Grant
    Filed: August 23, 2005
    Date of Patent: December 9, 2008
    Assignee: OXENO Olefinchemie GmbH
    Inventors: Franz Nierlich, Cornelia Borgmann, Dirk Roettger, Stephan Houbrechts, Dietrich Maschmeyer
  • Method for producing 1-olefins using palladium carbene compounds
    Patent number: 7371909
    Abstract: The invention relates to a process 1-olefins by telomerization of compounds having conjugated double bonds with a telogen in the presence of a noble metal telomerization catalyst, hydrogenation of the telomer and cleavage of the hydrogenated intermediate. Use of the 1-olefin as comonomer.
    Type: Grant
    Filed: October 1, 2002
    Date of Patent: May 13, 2008
    Assignee: Oxeno Olefinchemie GmbH
    Inventors: Matthias Beller, Ralf Jackstell, Holger Klein, Dirk Roettger, Klaus-Diether Wiese, Dietrich Maschmeyer, Axel Tuchlenski, Alfred Kaizik, Silvia Santiago Fernandez
  • Method for producing 1-octene from crack-C
    Patent number: 7368621
    Abstract: The invention relates to a process for preparing 1-octene from a C4 fraction from a cracker by telomerization of the 1,3-butadiene present in the C4 fraction from a cracker by means of methanol in the presence of a catalyst, hydrogenation of the telomer obtained in this way, dissociation of the hydrogenated telomer and work-up of the resulting dissociation product to give pure 1-octene.
    Type: Grant
    Filed: May 6, 2004
    Date of Patent: May 6, 2008
    Assignee: OXENO Olefinchemie GmbH
    Inventors: Joerg Krissmann, Dirk Roettger, Cornelia Borgmann, Kerstin Kaemper, Franz Nierlich, Alfred Kaizik, Udo Knippenberg, Rainer Malzkorn
  • Method for producing 1-olefins by catalytically splitting 1-alkoxyalkanes
    Patent number: 7342144
    Abstract: The present invention relates to a process for preparing 1-olefins from 1-alkoxyalkanes, in particular to the preparation of 1-octene from 1-alkoxyoctane, by base-catalyzed alcohol cleavage.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: March 11, 2008
    Assignee: OXENO Olefinchemie GmbH
    Inventors: Alfred Kaizik, Dietrich Maschmeyer, Dirk Roettger, Franz Nierlich, Cornelia Borgmann
  • PROCESS FOR FINE PURIFICATION OF 1-BUTENIC STREAMS
    Publication number: 20080021255
    Abstract: The invention relates to a process for preparing 1-butenic fractions having less than 2000 ppm of isobutene in relation to 1-butene from technical mixtures of C4 hydrocarbons I which contain at least 1-butene and 2000 ppmw to 8% by mass of isobutene based on the 1-butene, with or without n-butane, isobutane and/or 2-butenes.
    Type: Application
    Filed: December 14, 2006
    Publication date: January 24, 2008
    Applicant: OXENO OLEFINCHEMIE GMBH
    Inventors: Silvia Santiago-Fernandez, Armin Rix, Jochen Praefke, Dirk Roettger, Markus Winterberg, Wilfried Bueschken
  • Method for separation of substances by extraction or by washing them with ionic liquids
    Patent number: 7304200
    Abstract: The present invention relates to a process for the liquid-liquid extraction or liquid-gas extraction of mixtures of organic compounds, in which one or more components of the mixture are completely or partly extracted by means of a phase comprising at least one ionic liquid.
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: December 4, 2007
    Assignee: OXENO Olefinchemie GmbH
    Inventors: Dirk Roettger, Franz Nierlich, Joerg Krissmann, Peter Wasserscheid, Wilhelm Keim
  • Process for preparing 1-butene from technical mixtures of C4 hydrocarbons
    Publication number: 20070149839
    Abstract: The invention relates to a process for preparing 1-butene from technical mixtures which comprise at least 1-butene, isobutene, n-butane and 2-butenes by partial conversion of the isobutene present, distillative removal of a fraction comprising 1-butene and isobutene, and conversion of the isobutene present therein to tert-butyl ethers.
    Type: Application
    Filed: September 15, 2006
    Publication date: June 28, 2007
    Applicant: Degussa AG
    Inventors: Armin Rix, Udo Peters, Jochen Praefke, Dirk Roettger, Franz Nierlich
  • Phosphinine compounds and metal complexes thereof
    Patent number: 7217828
    Abstract: Phosphinines of formula (I) can be combined with metal salts to prepare hydroformylation catalysts. The phosphinine complexes have two phosphorus centers that may be substituted with a variety of hetero atoms or alkyl substituents to modify the ligand characteristics of the phosphinine. Phosphinine metal complexes are employed under normal hydroformylation reaction conditions. The preparatory routes to the phosphinine ligands of formula (I) allow for their convenient synthesis.
    Type: Grant
    Filed: August 5, 2004
    Date of Patent: May 15, 2007
    Assignee: OXENO Olefinchemie GmbH
    Inventors: Detlef Selent, Armin Boerner, Renat Kadyrov, Cornelia Borgmann, Dieter Hess, Klaus-Diether Wiese, Dirk Roettger
  • Oligomerization of isobutene in N-butenic hydrocarbon streams
    Patent number: 7161053
    Abstract: Isobutene in isobutenic hydrocarbon mixtures is oligomerized over a solid acidic ion exchange resin, said acidic ion exchange resin containing, for example, sulfonic acid groups, some of whose protons have been exchanged for metal ions.
    Type: Grant
    Filed: August 6, 2003
    Date of Patent: January 9, 2007
    Assignee: Oxeno Olefinchemie GmbH
    Inventors: Andreas Beckmann, Franz Nierlich, Udo Peters, Wilfried Büschken, Lothar Kerker, Dietrich Maschmeyer, Dirk Röttger
  • Process for the oligomerization of butenes
    Publication number: 20060264686
    Abstract: The invention relates to a process for the oligomerization of butenes, in which a stream which contains predominantly butenes and has been obtained by separation from a stream of hydrocarbons having a lower content of butenes, scrubbing and drying is fed to the oligomerization.
    Type: Application
    Filed: January 6, 2006
    Publication date: November 23, 2006
    Applicant: OXENO OLEFINCHEMIE GMBH
    Inventors: Lothar Kerker, Armin Rix, Frank Hoper, Rainer Malzkorn, Dirk Roettger
  • Method for producing C-alcohol mixtures
    Patent number: 7138552
    Abstract: The present invention relates to a process for preparing a C13-alcohol mixture which is suitable, in particular, as precursor for the preparation of compounds having surfactant properties and of plasticizers.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: November 21, 2006
    Assignee: OXENO Olefinchemie GmbH
    Inventors: Alfred Kaizik, Walter Tötsch, Wilhelm Droste, Wilfried Büschken, Dirk Röttger, Klaus-Diether Wiese
  • Method for the production of 1-octene by reductive telomerisation
    Patent number: 7115790
    Abstract: The invention relates to a process for preparing 1-octene by telomerization of 1,3-butadiene using a reducing agent in the presence of a telomerization catalyst and partial hydrogenation of the octadiene obtained in this way.
    Type: Grant
    Filed: September 18, 2002
    Date of Patent: October 3, 2006
    Assignee: OXENO Olefinchemie GmbH
    Inventors: Matthias Beller, Ralf Jackstell, Holger Klein, Dirk Roettger, Dietrich Maschmeyer, Silvia Santiago Fernandez
  • N-phenyl-pyrrol bisphosphane compounds and the metal complexes of the same
    Patent number: 7109346
    Abstract: N-Phenylpyrrolebisphosphines of the formula I metal complexes of these N-phenylpyrrolebisphosphines and their use in metal-catalyzed reactions.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: September 19, 2006
    Assignee: OXENO Olefinchemie GmbH & Co. KG
    Inventors: Matthias Beller, Ralf Jackstell, Holger Klein, Detlef Heller, Hans-Joachim Drexler, Klaus-Diether Wiese, Dirk Roettger