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| Number | Title | Issue Date |
| 8003826 | Method for production of trimethylhexamethylenediamine The invention relates to an improved process for preparing trimethylhexamethylenediamine, hereinafter referred to as TMD for short, by hydrogenation of trimethylhexamethylenedinitrile, hereinafter referred to as TMN for short, in the presence of a shaped hydrogenati... | 08/23/2011 |
| 7960591 | Method for producing triethylenetetramine The invention relates to a process for preparing triethylenetetramine (TETA), which comprises hydrogenating ethylenediaminediacetonitrile (EDDN) in the presence of a catalyst and a solvent. ... | 06/14/2011 |
| 7880036 | Production method for ethyleneamine mixtures The invention relates to a process for preparing an ethylene amine mixture, which comprises hydrogenating an amino nitrile mixture comprising at least two α-amino nitriles in an amount of at least 5% by weight in each case in the presence of a catalyst and, if appr... | 02/01/2011 |
| 7399886 | Aminopropylation of alcohols in the presence of amide or ether solvents This invention relates to an improved hydrogenation process for the preparation of etheramines. In the process, cyanoethylated alcohols, i.e., the reaction product of an alcohol with (meth)acrylonitrile, are contacted with hydrogen in the presence of a sponge cobalt... | 07/15/2008 |
| 7381845 | Nitrile hydrogenation on heterogeneous catalysts in the presence of ionic liquids A process for hydrogenating nitrile functions present in organic compounds over at least one heterogeneous catalyst, in which the hydrogenation is carried out in the presence of an ionic liquid, is described. ... | 06/03/2008 |
| 7291754 | Process for the catalytic hydrogenation of a nitrile Process for the catalytic hydrogenation of a nitrite in the presence of an amine and a catalyst wherein the catalyst is a liquid-rinsed Raney-type catalyst contacted with a hydroxide prior to contacting the catalyst with the amine. The process results in higher sele... | 11/06/2007 |
| 7208448 | In an amine or nitrile embedded passivated hydrogenation catalyst The invention relates to a passivated hydrogenation catalyst that is embedded in a primary amine, a derivative thereof, and/or a nitrile, the process to make such catalysts, as well as the use of such catalysts in a hydrogenation process in which an amine or a deriv... | 04/24/2007 |
| 7196223 | Higher alcohols for solvents in amine production A nitrile-containing mixture, which includes a nitrile dissolved in a higher alcohol solvent, and hydrogen are fed to a reactor containing a catalyst. An amine is produced by hydrogenating the nitrile that is dissolved in the higher alcohol solvent. In a preferred e... | 03/27/2007 |
| 7115781 | Iron-containing oxidic material suitable for use as hydrogenation catalyst precursor An oxidic composition which is suitable as a catalyst having divalent and trivalent iron in an atomic ratio of divalent to trivalent iron in the range from greater than 0.5 to 5.5 and oxygen as a counterion to the divalent and trivalent iron. The catalyst compositio... | 10/03/2006 |
| 7030053 | Catalyst composition comprising ruthenium and a treated silica support component and processes therefor and therewith for preparing high molecular weight hydrocarbons such as polymethylene A catalyst composition and a process of using a catalyst composition for preparing high molecular weight hydrocarbons, such as polymethylene, from a fluid containing hydrogen and carbon monoxide are disclosed. The catalyst composition contains ruthenium and a treate... | 04/18/2006 |
| 6984759 | Process for the preparation of perfluoropolyethers having aldehyde, alcohol, amine end groups by catalytic reduction Process for the perfluoropolyether preparation having reactive end groups —CH2NH2, —CHO, —CH2OH, by reduction of the corresponding perfluoropolyethers having —CN, —COCl, —CHO end groups by using gaseous hydrogen in the pr... | 01/10/2006 |
| 6951959 | Low pressure process for manufacture of 3-dimethylaminopropylamine (DMAPA) An improved process for the production of 3-dimethylaminopropylamine in high purity from N,N-dimethylaminopropionitrile utilizing a low pressure hydrogenation process is described. The basic process comprises contacting the nitrile with hydrogen at low pressure in t... | 10/04/2005 |
| 6790994 | Methods for hydrogenating nitrile functions into amine functions The present invention relates to a process for the hydrogenation of nitrile functional groups to amine functional groups. It relates more particularly to a process for the complete or partial hydrogenation of dinitrile compounds to diamine or aminonitrile compounds.... | 09/14/2004 |
| 6790996 | Supported cobalt catalysts for nitrile hydrogenations The invention relates to a process for preparing primary amines by hydrogenating nitrites in the presence of a catalyst comprising cobalt and optionally, in addition, nickel and also at least one further doping metal on a particulate support material, the cobalt and... | 09/14/2004 |
| 6677486 | Hydrogenation of nitriles over Raney catalysts Nitriles are hydrogenated to primary amines over an activated, alpha-Al2 O3 -containing, macroporous Raney catalyst based on an alloy of aluminum and at least one transition metal selected from the group consisting of iron, cobalt an... | 01/13/2004 |
| 6600075 | Process for the preparation of tertiary amines from primary amines and nitriles Disclosed is a method for preparing tertiary amine compounds from primary amines and nitrites in the presence of hydrogen gas and a metal catalyst, or metal-containing catalyst composition, at a temperature from about 50° C. to about 200° C. and at a pr... | 07/29/2003 |
| 6469211 | Hydrogenation of nitriles over Raney catalysts In a process for the continuous hydrogenation of nitrites to primary amines in the liquid phase over a suspended, activated Raney catalyst based on an alloy of aluminum and at least one transition metal selected from the group consisting of iron, cobalt a... | 10/22/2002 |
| 6399830 | Selective reductive amination of nitriles This invention pertains to an improvement in a process for the formation of secondary or tertiary amines by the catalytic reductive amination of a nitrile with a primary amine. The catalyst employed in the improved reductive amination process is one that ... | 06/04/2002 |
| 6380420 | Process for making fatty acid nitriles and fatty amines by cross-metathesis of normal alpha olefins A process for preparing fatty amines by the cross-metathesis of normal alpha olefins and acrylonitrile to form an intermediate fatty acid nitrile which is hydrogenated to the corresponding fatty amine.... | 04/30/2002 |
| 6376714 | Environmentally friendly process for the hydrogenation of dinitriles Process for converting a dinitrile to a diamine and optionally an aminonitrile, in which a Group VIII element catalyst is treated with a modifier either before or during a substantially solvent-free hydrogenation reaction in which the dinitrile is contact... | 04/23/2002 |
| 6198002 | Preparation of secondary and tertiary 2-methyl-1, 5-pentanediamines A process for preparing a secondary or tertiary 2-methyl-1,5-pen-tanediamine of the formula I ##STR1## where R1 and R2 are H, C1 -C20 -alkyl, C3 -C8 -cycloalkyl, aryl, C7 -C... | 03/06/2001 |
| 6156694 | Raney cobalt catalyst and a process for hydrogenating organic compounds using said catalyst The present invention relates to a Raney catalyst comprising iron, cobalt, a third metal wherein the third metal is selected from the group consisting of nickel, rhodium, ruthenium, palladium, platinum, osmium, iridium and mixtures of any of the metals of... | 12/05/2000 |
| 6153784 | Removal of halides from halide-containing nitrile mixtures Halides are removed from halide-containing nitrile mixtures by (a) thermally treating the halide-containing nitrile mixture, (b) subsequently adding a base to the thermally treated nitrile mixture and (c) subsequently separating off the base from the nitrile mixture. Am... | 11/28/2000 |
| 6087296 | Raney iron catalyst and a process for hydrogenating organic compounds using said catalyst The present invention relates to a Raney catalyst comprising iron, cobalt, a third metal wherein the third metal is selected from the group consisting of nickel, rhodium, ruthenium, palladium, platinum, osmium, iridium and mixtures of any of these metals.... | 07/11/2000 |
| 6005145 | Metallic compounds useful as catalysts The present invention relates to new metal compounds, to a process for the preparation of these metal compounds and to their use as catalysts. The new metal compounds according to the invention have, when they are used as catalysts, in particular as hydrogenat... | 12/21/1999 |
| 5894074 | Preparation of tertiary amines from nitriles and secondary amines A process for preparing amines of the general formula (I) X(--CH2 --NR1 R2)n (I) where R1 and R2 are preferably methyl, X is preferably 1,4-butylene and n is preferably 2, compris... | 04/13/1999 |
| 5886227 | Process for hydrogenation of cyanopropionaldehyde-containing cyanopropionadelhyde acetals Disclosed is an improved process for the catalytic hydrogenation of cyanopropionaldehyde alkyl acetals (CPAA) to form the aminobutyraldehyde alkyl acetals. The basic process comprises hydrogenating the cyanopropionaldehyde alkyl acetals by contacting said... | 03/23/1999 |
| 5874625 | Process to hydrogenate organic nitriles to primary amines An improved, optimized industrial process has been found for the hydrogenation of organic nitrites into primary amines, which essentially consists of contacting a dried charge of at least one organic nitrile, aqueous alkali metal hydroxide, at least one R... | 02/23/1999 |
| 5869653 | Hydrogenation of nitriles to produce amines An improved process for the catalytic hydrogenation of nitriles. The basic process comprises contacting the nitrile with hydrogen in the presence of a sponge or Raney cobalt catalyst under conditions for effecting conversion of the nitrile group to the pr... | 02/09/1999 |
| 5844114 | Method for the selective hydrogenation of a dinitrile compound The invention relates to a method for the selective hydrogenation of a dinitrile compound in the presence of a catalyst which comprises a metal of group 8 of the periodic system of the elements, the catalyst comprising a zeolite having a pore diameter of ... | 12/01/1998 |
| 5840989 | Catalyst for the hydrogenation of nitriles to amines, preparation process thereof and hydrogenation process making use thereof The invention relates to a method of doping a Raney nickel catalyst doped with metals by the incorporation of the doping metals in the form of a complex into the alkaline attack medium. Also disclosed is a process for the hydrogenation of nitriles to amin... | 11/24/1998 |
| 5801286 | Process for the preparation of a catalyst for the hydrogenation of nitriles to amines and use of this catalyst in hydrogenation The present invention relates to the field of the catalytic hydrogenation of nitrites to amines and, more particularly, of dinitriles such as adiponitrile (ADN) to diamines such as hexamethylenediamine (HMD). More precisely, the present invention relates to a ... | 09/01/1998 |
| 5789621 | Preparation of amines and aminonitriles A process for preparing an NH2 -containing compound by hydrogenating a compound containing at least one unsaturated carbon-nitrogen bond with hydrogen in the presence of a catalyst at temperatures not below room temperature and elevated hydroge... | 08/04/1998 |
| 5777166 | Process for the catalytic hydrogenation of nitriles to amines in the presence of a catalyst of doped raney nickel type The present invention relates to the field of the catalytic reduction of nitriles to amines by use of Raney catalysts doped with one or a number of additional metal elements chosen from the elements of group IVb of the periodic classification. More precis... | 07/07/1998 |
| 5763669 | Process for the preparation of ruthenium complexes and their in situ use as hydrogenation catalysts This invention relates to a process of preparing a ruthenium complex of the formula RuH2 (PR3)2 L2 wherein PR3 is an organophosphorus ligand and L is H2 or PR3 ; a catalyst compr... | 06/09/1998 |
| 5760157 | Aminotelechelic partially hydrogenated 1,3-diene oligomers and process for the preparation of these compounds Compounds of the formula P!(ACH2 NH2)x in which P denotes a partially hydrogenated 1,3-diene oligomer residue, x is practically equal to 2 and A denotes a divalent residue such as ##STR1## are obtained by selective hydro... | 06/02/1998 |
| 5750788 | Preparation of amines from compounds having at least 3 cyano groups A process is disclosed for preparing amines by hydrogenating compounds with at least 3 cyano groups prepared by adding acrylonitrile to ammonia or primary amines at temperatures from 80° to 200° C. and pressures from 5 to 500 bars. Hydrogenation is carr... | 05/12/1998 |
| 5726334 | Process for the preparation of ruthenium hydrogenation catalysts and products thereof This invention relates to a process for the preparation of ruthenium complexes of the formula RuH2 L2 (PR3)2, wherein each L is independently H2 or an additional equivalent of PR3, and each... | 03/10/1998 |
| 5689003 | Ruthenium hydrogenation catalysts The invention relates to a novel ruthenium complex having the formula Ru(η3 --C6 H8 --PCy2)(PCy3)Cl, wherein Cy is cyclohexyl; its use in the preparation of RuHCl(H2)(PCy3)2 | 11/18/1997 |
| 5629451 | Reduction of nitrile contaminants by selective hydrogenation A process for selectively reducing nitrile contaminants in fluids such as water, methanol or hydrocarbon streams containing mono olefins and which contain minor amounts of contaminants comprising nitriles in the presence of hydrogen and a supported cobalt... | 05/13/1997 |
