Patent application number | Description | Published |
20080217158 | Method for Obtaining Cyclododecatriene by Evaporation - Process for recovering cyclododecatriene (CDT) from a solution comprising CDT and high boilers such as deactivated catalyst and polymers, which comprises feeding the solution into a preheater and heating it, subsequently depressurizing it through a downstream pressure maintenance device and feeding the resulting two-phase mixture into a helical tube evaporator and there reducing the CDT content of the liquid phase by partial evaporation and discharging a gaseous product stream having an increased concentration of CDT. | 09-11-2008 |
20090234163 | Method for producing an ethylamine - Processes comprising: (a) providing a first reactant comprising a bioethanol; and (b) reacting the first reactant with a second reactant comprising a component selected from the group consisting of ammonia, primary amines, secondary amines and mixtures thereof, in the presence of hydrogen and a catalytically effective amount of a heterogeneous hydrogenation/dehydrogenation catalyst to form an ethylamine; wherein the catalyst has been activated at a temperature of 100 to 500° C. for at least 25 minutes; wherein prior to activation the catalyst comprises: (i) 20 to 65% by weight of a support material comprising one or both of zirconium dioxide (ZrO | 09-17-2009 |
20100191018 | PROCESS FOR PREPARING PURE CYCLODODECANONE - The present invention relates to a process for preparing at least one cyclic compound with Z cycles and 7 to 16 carbon atoms with a keto group, at least comprising the stages:
| 07-29-2010 |
20110046413 | PROCESS FOR PREPARING 4-PENTENOIC ACID - The present invention relates to a process for preparing 4-pentenoic acid, at least comprising the oxidation of a mixture (G) comprising 4-pentenal, 3-methyl-2-butanone and cyclopentene oxide, and to the use of a mixture (G) comprising 4-pentenal, 3-methyl-2-butanone and cyclopentene oxide for preparing 4-pentenoic acid. In the context of the present invention, the mixture (G) is preferably obtained as a by-product of the oxidation of cyclopentene to cyclopentanone by means of dinitrogen monoxide. | 02-24-2011 |
20110152576 | PROCESS FOR PREPARING CYCLIC KETONES - The present invention relates to a process for preparing at least one monocyclic ketone having from 4 to 20 carbon atoms by reacting a mixture G | 06-23-2011 |
20110180151 | METHOD FOR SAFELY PREVENTING BACKFLOWING IN THE CONVEYING OF A FLUID - A method for reliably avoiding backflow in the transport of a liquid under pressure via a transport pipe ( | 07-28-2011 |
20120157719 | TUBE BUNDLE REACTOR FOR UNCATALYZED OR HOMOGENEOUSLY CATALYZED REACTIONS - The invention relates to a tube bundle reactor with a flat feed hood. Alternatively, the release hood may also have a flat design. The flat design reduces the heat of reaction which arises in the hood in the case of reaction types which take place not only in the tube bundle (uncatalyzed reactions and reactions with homogeneously distributed catalyst). This greatly suppresses undesired reactions which already take place in the hood owing to accumulated heat, which achieves a higher selectivity in the case of thermally sensitive reactions. In addition, the thermal distribution within the hoods can be controlled precisely. | 06-21-2012 |
20130090496 | PROCESS FOR PREPARING FORMIC ACID BY REACTING CARBON DIOXIDE WITH HYDROGEN - The invention relates to a process for preparing formic acid by reacting carbon dioxide with hydrogen in a hydrogenation reactor in the presence of a catalyst comprising an element of group 8, 9 or 10 of the Periodic Table, a tertiary amine and a polar solvent to form formic acid-amine adducts which are subsequently dissociated thermally into formic acid and tertiary amine. | 04-11-2013 |
20130123526 | PROCESS FOR PREPARING FORMIC ACID BY REACTION OF CARBON DIOXIDE WITH HYDROGEN - The invention relates to a process for preparing formic acid by reaction of carbon dioxide with hydrogen in a hydrogenation reactor in the presence of a transition metal complex as a catalyst comprising at least one element from group 8, 9 or 10 of the Periodic Table and at least one phosphine ligand with at least one organic radical having at least 13 carbon atoms, of a tertiary amine and of a polar solvent to form a formic acid-amine, adduct, which is subsequently dissociated thermally to formic acid and the corresponding tertiary amine. on unit. | 05-16-2013 |
20130331607 | PROCESS FOR PREPARING FORMIC ACID - A process for preparing formic acid by hydrogenation of carbon dioxide in the presence of a tertiary amine (I), a diamine (II), a polar solvent and a catalyst comprising gold at a pressure of from 0.2 to 30 MPa abs and a temperature of from 0 to 200° C., wherein the catalyst is a heterogeneous catalyst comprising gold. | 12-12-2013 |