Patents Assigned to Oxea GmbH
  • Patent number: 8524938
    Abstract: The present invention relates to a process for lightening the color of polyol esters by reacting polyols with linear or branched aliphatic monocarboxylic acids having 3 to 20 carbon atoms, wherein the reaction product is worked up without using adsorbents and comprises a treatment with ozone or ozone-containing gases and an immediately subsequent steam treatment with subsequent drying.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: September 3, 2013
    Assignee: Oxea GmbH
    Inventors: Guido D. Frey, Thorsten Kreickmann, Heinz Strutz
  • Patent number: 8524937
    Abstract: The present invention relates to a process for preparing polyol esters by reacting polyols with linear or branched aliphatic monocarboxylic acids having 3 to 20 carbon atoms by partial recycling of the aliphatic monocarboxylic acid removed into the esterification reaction or into subsequent esterification batches.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: September 3, 2013
    Assignee: Oxea GmbH
    Inventors: Michael Adamzik, Thomas Müller, Willy Schulz, Heyko Jürgen Schultz
  • Publication number: 20130150624
    Abstract: A continuous process for producing primary aliphatic amines having 9 to 18 carbon atoms by reaction of corresponding aliphatic aldehydes with ammonia and hydrogen in the presence of a hydrogenation catalyst in the liquid phase, characterized in that the reaction is carried out solventlessly at a molar ratio of aliphatic aldehyde:ammonia of at least 1:30, at a temperature of 100 to 200° C. and at a pressure of 6 to 11 MPa.
    Type: Application
    Filed: August 18, 2011
    Publication date: June 13, 2013
    Applicant: OXEA GMBH
    Inventors: Kurt Schalapski, Norman Nowotny, Matthias Eisenacher, Dirk Bermann, Thorsten Kreickmann, Peter Heymanns, Heinz Strutz
  • Publication number: 20130131391
    Abstract: The present invention relates to a process for obtaining ditrimethylolpropane and trimethylolpropane-enriched product streams from the high-boiling fractions and residues which are obtained in the distillative purification of trimethylolpropane, wherein an aqueous solution of these fractions and residues is catalytically hydrogenated in the presence of an acidic compound and, after removing solids, contacted both with basic and with acidic ion exchangers. A trimethylolpropane-enriched product stream can be distilled out of the aqueous eluate obtained, leaving ditrimethylolpropane as the distillation residue.
    Type: Application
    Filed: July 28, 2011
    Publication date: May 23, 2013
    Applicant: OXEA GMBH
    Inventors: Thorsten Kreickmann, Guido D. Frey, Norman Nowotny, Heinz Strutz
  • Patent number: 8445728
    Abstract: The invention relates to a method for reprocessing a liquid product of a hydroformylation reaction, wherein the liquid phase produced in a release stage is supplied to a separating device from which a liquid flow containing rhodium is guided away via a filter, where solids thereby separated are taken out of the process and the filtrate obtained is guided back into the hydroformylation reaction.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: May 21, 2013
    Assignee: Oxea GmbH
    Inventors: Wolfgang Greb, Rainer Lukas, Klaus Schmid, Wolfgang Zgorzelski, Jörg Arnold
  • Publication number: 20130116467
    Abstract: A process for aftertreatment of polyol esters prepared by reacting polyols of the general formula H—(—O—[—CR1R2—]m—)o—OH in which R1 and R2 are each independently hydrogen, an alkyl radical having 1 to 5 carbon atoms, or a hydroxyalkyl radical having 1 to 5 carbon atoms, m is an integer of 1 to 10, o is an integer of 2 to 15, with linear or branched aliphatic monocarboxylic acids having 3 to 20 carbon atoms in the presence of an adsorbent and in the presence of metal compounds selected from the group of titanium compounds, zirconium compounds, tin compounds, zinc compounds, iron compounds and aluminium compounds as a catalyst while removing the water formed and subsequently treating with steam, characterized in that the polyol ester obtained is aftertreated first with an oxidizing or reducing compound and immediately thereafter with steam at a temperature of 150 to 250° C. and over a period of 0.5 to 5 hours.
    Type: Application
    Filed: June 29, 2011
    Publication date: May 9, 2013
    Applicant: OXEA GMBH
    Inventors: Guido D. Frey, Heyko Jürgen Schultz, Heinz Strutz
  • Patent number: 8399697
    Abstract: The present invention relates to a process for preparing polyol esters by reacting polyols with linear or branched aliphatic monocarboxylic acids having 3 to 20 carbon atoms in the presence of an adsorbent and subsequent steam treatment in the course of workup of the crude ester.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: March 19, 2013
    Assignee: Oxea GmbH
    Inventors: Tonia Weber, Oliver Borgmeier, Guido D. Frey, Heinz Strutz
  • Patent number: 8394998
    Abstract: The present invention relates to a method of producing neopentyl glycol by addition of isobutyraldehyde and formaldehyde in the presence of a tertiary alkylamine as catalyst to give the hydroxypivalinaldehyde with subsequent liquid phase hydrogenation in the presence of a nickel catalyst at a temperature of 80 to 180° C. and at a pressure of 6 to 18 MPa in the presence of an aliphatic alcohol and in the presence of water.
    Type: Grant
    Filed: June 12, 2009
    Date of Patent: March 12, 2013
    Assignee: Oxea GmbH
    Inventors: Kurt Schalapski, Tonia Kretz, Thorsten Kreickmann, Peter Heymanns, Rainer Lukas, Rolf-Peter Schulz
  • Patent number: 8357824
    Abstract: The present invention relates to a process for obtaining neopentyl glycol by hydrogenating cracking of high-boilers occurring in the production process in the presence of copper-chromite catalysts. The hydrogenating cracking proceeds in the absence of solvent at a temperature of 140 to 220° C. and at pressures of 7 to 28 MPa.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: January 22, 2013
    Assignee: Oxea GmbH
    Inventors: Rolf-Peter Schulz, Horst Scholz, Thomas Hupperich, Peter Heymanns, Tonia Weber, Alexander Kaufmann, Kurt Schalapski, Heinz Strutz
  • Patent number: 8173847
    Abstract: Aldehydes are produced by unmodified rhodium catalyzed hydroformylation process in a homogeneous organic phase using a solution of unmodified rhodium catalyst and an organic acid in a total amount, calculated as acid equivalent, of from greater than 3 moles to 3000 moles of acid per mole of rhodium. The organic acid is selected from: saturated aliphatic monocarboxylic acids having from 5 to 13 carbon atoms in the molecule; saturated aliphatic dicarboxylic acids having from 5 to 13 carbon atoms in the molecule; sulphonic acids having from 1 to 12 carbon atoms in the molecule; and combinations thereof. Use of the process can lead to either a significant increase in conversion without reducing selectivity for the desired aldehyde or a reduction in the specific use of rhodium.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: May 8, 2012
    Assignee: Oxea GmbH
    Inventors: Andreas Fischbach, Klaus Schmid, Christoph Balzarek, Wolfgang Dukat, Sandra Fürmeier, Rainer Lukas, Horst Scholz, Edgar Storm
  • Patent number: 8158816
    Abstract: The present invention relates to a process for lightening the color of polyol esters by reacting polyols with linear or branched aliphatic monocarboxylic acids having 3 to 20 carbon atoms, wherein the reaction product is worked up without using adsorbents and comprises a treatment with peroxidic compounds and an immediately subsequent steam treatment with subsequent drying.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: April 17, 2012
    Assignee: OXEA GmbH
    Inventors: Guido D. Frey, Thorsten Kreickmann, Tonia Weber, Heinz Strutz
  • Publication number: 20110184212
    Abstract: The present invention relates to a process for obtaining neopentyl glycol by hydrogenating cracking of high-boilers occurring in the production process in the presence of copper-chromite catalysts. The hydrogenating cracking proceeds in the absence of solvent at a temperature of 140 to 220° C. and at pressures of 7 to 28 MPa.
    Type: Application
    Filed: June 25, 2009
    Publication date: July 28, 2011
    Applicant: OXEA GMBH
    Inventors: Rolf-Peter Schulz, Horst Scholz, Thomas Hupperich, Peter Heymanns, Tonia Weber, Alexander Kaufmann, Kurt Schalapski, Heinz Strutz
  • Patent number: 7259279
    Abstract: Process for the hydroformylation of olefins by linkage of the input parameters prevailing in the hydroformylation reaction to the target parameters of a hydroformylation reaction, wherein the linkage is achieved by means of at least one synthetic neuronal network.
    Type: Grant
    Filed: November 15, 2005
    Date of Patent: August 21, 2007
    Assignee: Oxea GmbH
    Inventors: Dietmar Thiel, Carl Dieter Frohning