Patents Assigned to Oxea GmbH
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Patent number: 9174921Abstract: Process for coproduction of a vinyl ester of the formula R—C(O)O—CH?CH2 by transvinylation reaction of a carboxylic acid of the formula R—C(O)OH with a transvinylating reagent of the formula R1—C(O)O—CH?CH2, characterized in that (a) the transvinylation reaction is conducted continuously at a temperature of 90 to 160° C. and at a pressure of 0.Type: GrantFiled: January 18, 2013Date of Patent: November 3, 2015Assignee: OXEA GMBHInventors: Leif Johnen, Heinz Strutz
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Patent number: 9133083Abstract: A continuous method for preparing neopentyl glycol by addition of isobutyraldehyde and formaldehyde in the presence of a tertiary alkylamine as catalyst to give hydroxypivaldehyde with subsequent hydrogenation in the gas phase at a temperature of 125 to 180° C., is characterized in that the hydrogenation is carried out in the presence of a copper chromite catalyst comprising the activators barium and manganese and at a superatmospheric pressure of 30 to 120 kPa.Type: GrantFiled: September 30, 2013Date of Patent: September 15, 2015Assignee: OXEA GMBHInventors: Matthias Eisenacher, Kurt Schalapski, Peter Heymanns, Rainer Lukas, Heinz Strutz
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Publication number: 20150239809Abstract: A method for preparing neopentyl glycol by addition of isobutyraldehyde and formaldehyde in the presence of a tertiary alkylamine as catalyst to give hydroxypivalaldehyde with subsequent hydrogenation at a temperature of 80 to 140° C. and at a pressure of 2 to 18 MPa in the liquid phase, is characterized in that the hydrogenation is carried out in the presence of a copper chromite catalyst comprising the activators barium and manganese.Type: ApplicationFiled: September 28, 2013Publication date: August 27, 2015Applicant: OXEA GMBHInventors: Matthias Eisenacher, Kurt Schalapski, Heinz Strutz
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Patent number: 9115110Abstract: 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 includes three stage distillation characterized in that second and third stages are configured as thin film evaporators with a column attachment with the second stage facilitating trimethylopropane recovery and the third stage facilitating ditrimethylolpropane recovery.Type: GrantFiled: October 24, 2012Date of Patent: August 25, 2015Assignee: OXEA GMBHInventors: Guido D. Frey, Kurt Schalapski, Dirk Bermann, Norman Nowotney, Heinz Strutz, Donald K. Raff
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Patent number: 9108898Abstract: A continuous process for preparing primary aliphatic amines having 3 to 18 carbon atoms by reacting corresponding aliphatic aldehydes with ammonia and hydrogen in the presence of a hydrogenation catalyst, characterized in that the reaction is carried out without solvent at a molar ratio of aliphatic aldehyde to ammonia of more than 1 to 16, above the critical temperature and above the critical pressure of ammonia.Type: GrantFiled: July 11, 2013Date of Patent: August 18, 2015Assignee: OXEA GMBHInventors: Dirk Bermann, Matthias Eisenacher, Sebastian Geisel, Leif Johnen, Peter Heymanns, Norman Nowotny, Kurt Schalapski, Heinz Strutz
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Publication number: 20150184202Abstract: The present invention relates to a method of producing diisobutene from fermentative produced isobutene, wherein the higher purity of the isobutene improves the method and the properties of the produced diisobutene.Type: ApplicationFiled: July 1, 2013Publication date: July 2, 2015Applicant: Oxea GmbHInventors: Jens Klabunde, Leif Johnen, Guido D. Frey, Sebastian Geisel, Horst Lange, Heinz Strutz
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Publication number: 20150166457Abstract: The present invention relates to a method of producing terephthalic acid derivatives from isobutene via p-xylene. The isobutene is fermentatively produced isobutene, the higher purity of which improves the method and the properties of the produced p-xylene and the terephthalic acid derivatives derived therefrom.Type: ApplicationFiled: June 20, 2013Publication date: June 18, 2015Applicant: Oxea GmbHInventors: Jens Klabunde, Heinz Strutz, Guido D. Frey
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Publication number: 20150167029Abstract: The present invention relates to a method of producing isopentane derivatives from fermentatively produced isobutene, the higher purity of which improves the method and the properties of the produced isopentane derivatives.Type: ApplicationFiled: July 1, 2013Publication date: June 18, 2015Applicant: Oxea GmbHInventors: Jens Klabunde, Heinz Strutz, Kristina Kockrick
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Patent number: 9045451Abstract: 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, characterized in that these high-boiling fractions and residues are combined and a polar solvent is added to produce a solution and the solution is treated at a temperature of 120 to 280° C. and at a pressure of 2 to 25 MPa with hydrogen in the presence of a solid nickel catalyst and an acidic compound. After catalytic treatment, the solution is subjected to multi-stage distillation including with a thin film evaporator with a column attachment in order to recover ditrimethylolpropane and trimethylolpropane-enriched product streams.Type: GrantFiled: October 24, 2012Date of Patent: June 2, 2015Assignee: Oxea GmbHInventors: Guido D. Frey, Thorsten Kreickmann, Heinz Strutz
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Patent number: 9018417Abstract: A process is provided for recovering aliphatic monocarboxylic acids having from 4 to 11 carbon atoms from the distillation residue obtained in the oxidation of the corresponding aldehyde by means of oxygen or oxygen-containing gas mixtures in the presence of alkali metal carboxylates or alkaline earth metal carboxylates to form the corresponding monocarboxylic acid and subsequent distillation, characterized in that the distillation residue is reacted with an aqueous acid in a tube reactor and the two-phase mixture flowing out from the tube reactor is introduced into a settling vessel in which the organic phase which separates out has a pH of 4.5 or less.Type: GrantFiled: November 20, 2012Date of Patent: April 28, 2015Assignee: Oxea GmbHInventors: Guido D. Frey, Jörg Arnold, Wolfgang Höfs, Matthias Kramer, Thomas Müller, Heinz Strutz
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Patent number: 9006479Abstract: The present invention relates to a process for preparing polyol esters by reacting polyols with linear or branched aliphatic monocarbocxylic acids having 3 to 20 carbon atoms, the reaction taking place in the presence of a Lewis acid comprising at least one element from groups 4 to 14 of the Periodic Table of the Elements as catalyst, and in the presence of an adsorbent, the reaction product being subjected subsequently to a steam treatment.Type: GrantFiled: September 17, 2010Date of Patent: April 14, 2015Assignee: Oxea GmbHInventors: Guido D. Frey, Heinz Strutz
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Patent number: 8987527Abstract: A process for obtaining trimethylolpropane-enriched product streams from the forerun fractions obtained in the distillative purification of trimethylolpropane is characterized in that: (a) the forerun fractions are treated separately or in combination at a temperature of 160 to 280° C. and at a pressure of 1 to 30 MPa with hydrogen in the presence of a hydrogenation catalyst and an acidic compound; and (b) the reaction mixture obtained after step a) is separated by distillation into a trimethylolpropane-enriched, catalyst-free product stream and a catalyst-containing product stream. The trimethylolpropane is prepared by the Cannizzaro process using alkali metal or alkaline earth metal compounds or stoichiometric amounts of trialkylamines, or is produced by the hydrogenation process in the presence of catalytic amounts of trialkylamines or alkali metal or alkaline earth metal compounds.Type: GrantFiled: November 28, 2012Date of Patent: March 24, 2015Assignee: Oxea GmbHInventors: Guido D. Frey, Heinz Strutz
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Patent number: 8987523Abstract: 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: GrantFiled: July 28, 2011Date of Patent: March 24, 2015Assignee: Oxea GmbHInventors: Thorsten Kreickmann, Guido D. Frey, Norman Nowotny, Heinz Strutz
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Publication number: 20140288318Abstract: 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 includes three stage distillation characterized in that second and third stages are configured as thin film evaporators with a column attachment with the second stage facilitating trimethylopropane recovery and the third stage facilitating ditrimethylolpropane recovery.Type: ApplicationFiled: October 24, 2012Publication date: September 25, 2014Applicant: Oxea GmbHInventors: Guido D. Frey, Kurt Schalapski, Dirk Bermann, Norman Nowotney, Heinz Strutz, Donald K. Raff
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Patent number: 8841489Abstract: The invention relates to a continuous method for carrying out a multiphase aldol condensation reaction to obtain mixed ?,?-unsaturated aldehydes by reacting a mixture of two aliphatic aldehydes having different numbers of carbon atoms, i.e. 2 to 5, in the molecule in a vertical tubular reactor in a concurrent flow in the presence of an aqueous solution of a basically reacting compound. In said method, the aldehyde mixture is dispersed in the aqueous phase in the form of drops, and the aqueous solution of the basically reacting compound flows through the tubular reactor as a continuous phase in laminar conditions.Type: GrantFiled: February 9, 2012Date of Patent: September 23, 2014Assignee: Oxea GmbHInventors: Dirk Bermann, Guido D. Frey, Norman Nowotny, Kurt Schalapski, Heinz Strutz
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Publication number: 20140220342Abstract: The present invention relates to a copolymer composition comprising 5-95 pphwm of vinyl acetate and 95-5 pphwm of vinyl 3,5,5-trimethylhexanoate, wherein the corresponding 3,5,5-trimethylhexanoic acid has a content of the 3,5,5-trimethylhexanoic acid isomer of at least 88% by weight. Said copolymer is composed and synthesized so as to be useful in the formulation of binders for fibrous substrates such as woven or nonwoven products, paints, adhesives for porous or non-porous substrates, construction cementitious compositions, redispersible powders.Type: ApplicationFiled: September 12, 2011Publication date: August 7, 2014Applicant: Oxea GmbHInventors: Antonietta Schiro, Tito Zanetta, Christoph Balzarek, Olivier Borgmeier, Guido Frey, Leif Johnen, Donald Raff, Heinz Strutz
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Patent number: 8796486Abstract: 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 aluminum 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: GrantFiled: June 29, 2011Date of Patent: August 5, 2014Assignee: Oxea GmbHInventors: Guido D. Frey, Heyko Jürgen Schultz, Heinz Strutz
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Patent number: 8664444Abstract: 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: GrantFiled: August 18, 2011Date of Patent: March 4, 2014Assignee: Oxea GmbHInventors: Kurt Schalapski, Norman Nowotny, Matthias Eisenacher, Dirk Bermann, Thorsten Kreickmann, Peter Heymanns, Heinz Strutz
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Patent number: 8664434Abstract: A process for preparing aliphatic carboxylic acids having 3 to 10 carbon atoms by oxidizing the corresponding aldehydes with oxygen or oxygen-containing gases, characterized in that (i) the oxidation is performed in a microreactor at elevated pressure and with an oxygen excess based on the stoichiometrically required amount of oxygen, and (ii) in that the reaction mixture removed from the microreactor is passed through at least one postreactor without further addition of oxygen, and (iii) wherein the oxidation reaction in the microreactor is performed under such conditions that aldehyde and corresponding peracid formed are present in the reaction mixture removed in a molar ratio within a range of 1:(0.9 to 1.1), preferably of 1:(0.95 to 1.05).Type: GrantFiled: March 3, 2010Date of Patent: March 4, 2014Assignee: Oxea GmbHInventors: Tonia Weber, Alexander Kaufmann, Oliver Borgmeier, Thorsten Kreickmann, Heinz Strutz, Diana Utz, Elias Klemm, Claudia Liebold
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Publication number: 20140005441Abstract: The invention relates to a continuous method for carrying out a multiphase aldol condensation reaction to obtain mixed ?, ?-unsaturated aldehydes by reacting a mixture of two aliphatic aldehydes having different numbers of carbon atoms, i.e. 2 to 5, in the molecule in a vertical tubular reactor in a concurrent flow in the presence of an aqueous solution of a basically reacting compound. In said method, the aldehyde mixture is dispersed in the aqueous phase in the form of drops, and the aqueous solution of the basically reacting compound flows through the tubular reactor as a continuous phase in laminar conditions.Type: ApplicationFiled: February 9, 2012Publication date: January 2, 2014Applicant: Oxea GmbHInventors: Dirk Bermann, Guido D. Frey, Norman Nowotny, Kurt Schalapski, Heinz Strutz