OXEA GMBH Patent applications |
Patent application number | Title | Published |
20150344400 | Method for Producing Polyol Esters - A process for preparing polyol esters by reacting polyols with linear or branched aliphatic monocarboxylic acids having 3 to 20 carbon atoms, is characterized in that a mixture of the starting compounds is allowed to react in the presence of a Lewis acid containing at least one element of groups 4 to 14 of the periodic table of the elements as a catalyst and in the presence of an adsorbent with removal of the water formed, and then the crude ester obtained is aftertreated by adding a further adsorbent which is an acidic activated carbon having a pH of 1 to 6.5. | 12-03-2015 |
20150239809 | Method for the Production of Neopentyl Glycol - 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. | 08-27-2015 |
20150184202 | Method for the Production of Diiobutene - 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. | 07-02-2015 |
20140288318 | Method for Recovering Di-Trimethylolpropane and Trimethylolpropane-Enriched Product Streams From the Side Streams of Trimethylolpropane Production - 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. | 09-25-2014 |
20140220342 | Vinyl Acetate/Vinyl 3,5,5-trimethylhexanoate Copolymer Binder Resins - 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. | 08-07-2014 |
20140005441 | Method for Carrying Out Multiphase Aldol Condensation Reactions to Give Mixed a, beta-Unsaturated Aldehydes | 01-02-2014 |
20130150624 | Method for Producing Primary Aliphatic Amines from Aldehydes - 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. | 06-13-2013 |
20130131391 | Method for obtaining ditrimethylolpropane and trimethylolpropane-enriched product streams from the side-streams in trimethylolpropane production - 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. | 05-23-2013 |
20130116467 | Process for Aftertreating Polyolesters - A process for aftertreatment of polyol esters prepared by reacting polyols of the general formula | 05-09-2013 |
20110184212 | PROCESS FOR PREPARING NEOPENTYL GLYCOL BY CRACKING HIGH BOILERS OCCURING IN THE PRODUCTION PROCESS - 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. | 07-28-2011 |