Abstract: The invention relates to isomeric nonyl benzoates, processes for their preparation, mixtures of the same with alkyl phthalate, alkyl adipate, or alkyl cyclohexanedicarboxylate, and also to the use of these mixtures.
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:
Application
Filed:
August 23, 2005
Publication date:
January 24, 2008
Applicant:
OXENO OLEFINCHEMIE GMBH
Inventors:
Franz Nierlich, Cornelia Borgmann, Dirk Rottger, Stephan Houbrechts, Dietrich Maschmeyer
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.
Abstract: The present invention relates to a process for preparing aldehydes by hydroformylation of olefinically unsaturated compounds catalyzed by metals of groups 8 to 10 of the Periodic Table of the Elements in the presence of cyclic carbonic esters and ligands which contain no sulfonic acid or sulfonate group.
Abstract: A tripentyl citrate having an optionally acylated, preferably acetylated, OH group, a process for making the tripentyl citrate, and the use of the tripentyl citrate as a plasticizer for plastics.
Abstract: (EN) The invention relates to the use of novel organophosphoric compounds and metal complexes thereof in catalytic reactions, and to the hydroformylation of olefins in the presence of these compounds.
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
Abstract: The invention relates to a process for preparing methyl tert-butyl ether (MTBE) in qualities which are suitable for organic syntheses and for use as a specialty solvent from MTBE in fuel quality.
Type:
Grant
Filed:
June 14, 2003
Date of Patent:
December 4, 2007
Assignee:
OXENO Olefinchemie GmbH
Inventors:
Fritz Obenaus, Wilhelm Droste, Bernhard Scholz, Franz Nierlich, Rainer Malzkorn, Udo Peters, Jochen Praefke, Richard Filipiak, Joachim Neumeister
Abstract: The invention relates to a process for preparing ETBE from technical mixtures which comprise at least 1-butene, isobutene, n-butane and 2-butenes, by reacting the isobutene present, distillatively removing a fraction comprising 1-butene and isobutene and again reacting the isobutene present therein to give ETBE.
Type:
Application
Filed:
December 21, 2006
Publication date:
August 30, 2007
Applicant:
OXENO OLEFINCHEMIE GMBH
Inventors:
Jochen Praefke, Armin Rix, Silvia Fernandez, Matthias Gromping, Frank Hoper, Udo Peters, Jorg Leistner, Franz Nierlich, Dirk Rottger
Abstract: A plasticizer capable of fast gelling and capable of imparting storage stability on plastisols contains dialkyl terephthalate, wherein the alkyl radicals of said dialkyl terephthalate have a longest carbon chain of at least 4 carbon atoms and have a total number of carbon atoms per alkyl radical of 5.
Abstract: A process for preparing low-water ethanol from at least two streams of relatively water-rich ethanol that have a different water content by dewatering at membranes. The low-water ethanol can be used to prepare ethyl tert-butyl ether (ETBE).
Type:
Application
Filed:
January 19, 2007
Publication date:
July 26, 2007
Applicant:
OXENO OLEFINCHEMIE GMBH
Inventors:
Armin RIX, Frank Hoper, Jochen Praefke, Wilfried Buschken
Abstract: Isobutene is prepared by dissociating tert-butanol into isobutene and water over an acid ion-exchange resin arranged as a fixed bed in at least one reactor at a temperature of from 80 to 150° C. and at a pressure of from 5 to 25 bar to obtain a reaction mixture, separating the reaction mixture into isobutene, a by-product, water and at least one mixture of undissociated tert-butanol and water. The reactor is operated pseudo-isothermally, with a temperature difference between inflowing and outflowing streams of less than 15 K.
Type:
Grant
Filed:
June 17, 2004
Date of Patent:
June 26, 2007
Assignee:
Oxeno Olefinchemie GmbH
Inventors:
Gerda Grund, Wilfried Bueschken, Dieter Reusch, Andreas Beckmann
Abstract: Process for preparing aldehydes and alcohols by rhodium-catalyzed hydroformylation of olefins having 6–20 carbon atoms with subsequent separation by distillation of the output from the hydroformylation reaction into the hydroformylation products and a rhodium-containing solution and recirculation of this solution to the hydroformylation reaction, wherein the rhodium concentration of the recirculated rhodium-containing solution is 20–150 ppm by mass.
Type:
Grant
Filed:
December 5, 2002
Date of Patent:
June 19, 2007
Assignee:
OXENO Olefinchemie GmbH
Inventors:
Walter Toetsch, Alfred Kaizik, Hermann-Josef Schulte-Althoff
Abstract: The present invention relates to a process for preparing organophosphites, organosphonites and organophosphinites by condensing phosphorus trihalides or organophosphorus halides with organic compounds bearing hydroxyl groups in the presence of polymeric basic ion exchange resins. The process according to the invention makes possible in a simple manner the preparation of trivalent organophosphorus compounds which may serve, for example, as ligands in rhodium complexes which may be used as a catalyst in hydroformylation.
Type:
Application
Filed:
October 27, 2004
Publication date:
May 24, 2007
Applicant:
OXENO OLEFINCHEMIE GMBH
Inventors:
Dagmara Ortmann, Klaus-Diether Wiese, Oliver Moller, Dirk Fridag
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.
Abstract: A reactor for carrying out catalyzed liquid reactions in which the catalyst is present as a dispersion in the reaction zone. The reactor includes at least one inlet and outlet, with all starting materials being fed in via the inlet and all products being discharged via the outlet. The inlet and outlet can be switched so that an exit previously serving as the outlet is utilized as an entrance serving as the inlet and at the same time an entrance previously serving as the inlet is utilized as an exit serving as the outlet. The inlet and outlet each include a filter element that keeps the catalyst in the reactor. The reactor also includes a device that ensures homogeneous distribution of the catalyst and the starting materials in the reactor. This reactor can carry out reactions at a high solids content without the catalyst having to be separated off from a product stream in an extra process step and without regular cleaning and thus shutdown of the process being necessary.
Abstract: The invention relates to isomeric nonyl benzoates, processes for their preparation, mixtures of the same with alkyl phthalate, alkyl adipate, or alkyl cyclohexanedicarboxylate, and also to the use of these mixtures.
Abstract: The present invention relates to a process for preparing aldehydes by hydroformylation catalyzed by metals of groups 8 to 10 of the Periodic Table of the Elements in the presence of cyclic carbonic esters.
Type:
Grant
Filed:
August 7, 2003
Date of Patent:
March 20, 2007
Assignee:
OXENO Olefinchemie GmbH
Inventors:
Oliver Moeller, Klaus-Diether Wiese, Dieter Hess, Cornelia Borgmann, Alfred Kaizik, Dirk Fridag
Abstract: The present invention relates to a process for preparing 1-olefins from 2-hydroxyalkanes by catalytic elimination of water under nonisomerizing conditions and to a catalyst which is particularly well-suited for this process and formally comprises yttrium oxide (Y2O3), zirconium dioxide (ZrO2) and an alkali metal oxide and/or alkaline earth metal oxide.
Type:
Application
Filed:
October 21, 2004
Publication date:
February 22, 2007
Applicant:
Oxeno Olefinchemie GMBH
Inventors:
Alfred Kaizik, Dietrich Maschmeyer, Klaus-Diether Wiese, Wilfried Buschken, Kurt-Alfred Gaudschun
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