Did You Know...
...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7626057 | Production of xylylenediamines A method of producing xylylenediamine by a two-stage hydrogenation of a starting phthalonitrile in a solvent. The main steps of the method are a hydrogenation step 1 and a hydrogenation step 2. In the hydrogenation step 1, a solution of the starting phthalonitrile i... | 12/01/2009 |
| 7528284 | Method for producing xylylenediamine (XDA) A process for preparing xylylenediamine, comprising the steps of ammoxidizing xylene to phthalonitrile and hydrogenating the phthalonitrile, which comprises contacting the vaporus product of the ammoxidation stage directly with a liquid organic solvent or with molte... | 05/05/2009 |
| 7442794 | Rearranged pentanols, a process for their production and their use as anti-inflammatory agents The invention relates to the compounds of formula I, a process for their production and their use as anti-inflammatory agents. ... | 10/28/2008 |
| 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 |
| 7368610 | Preparation of xylylenediamine (XDA) A process for preparing xylylenediamine, comprising the steps of ammoxidizing xylene to phthalonitrile and hydrogenating the phthalonitrile, which comprises contacting the vaporous product of the ammoxidation stage directly with a liquid organic solvent or with molt... | 05/06/2008 |
| 7358397 | Preparation of halogenated 4-aminophenols The present invention relates to halogenated 4-aminophenols and to halogenated 4-(phenyidiazenyl)phenols, to a process for their preparation and to the use of the halogenated 4-hydroxyphenols for preparing active ingredients, especially in pharmaceuticals and agroch... | 04/15/2008 |
| 7339080 | Method for the production of diaminoxylene by continuous hydrogenation of liquid phthalonitrile A process for preparing xylylenediamine by continuously hydrogenating liquid phthalonitrile over a heterogeneous catalyst in the presence of liquid ammonia in a reactor, which comprises mixing a stream of a phthalonitrile melt in liquid form by means of a mixer unit... | 03/04/2008 |
| 7323598 | Preparation of xylylenediamine (XDA) A process for preparing xylylenediamine, comprising the steps of ammoxidizing xylene to phthalonitrile by contacting the vaporous product of this ammoxidation stage directly with a liquid organic solvent (quench), removing products having a boiling poi... | 01/29/2008 |
| 7323597 | Method for the production of diaminoxylene by continuous hydrogenation of liquid phthalonitrile A process for preparing xylylenediamine by continuously hydrogenating liquid phthalonitrile over a heterogeneous catalyst in the presence of liquid ammonia in a reactor, in which a portion of the reactor effluent is recycled as a liquid circulation stream continuous... | 01/29/2008 |
| 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 |
| 7265237 | Chiral monophosphites as ligands for asymetrical synthesis Certain chiral monophosphites and their monothio derivatives are suitable as ligands in the asymmetrical transition-metal-catalyzed hydrogenation, hydroborination and hydrocyanation of prochiral olefins, ketones and imines. ... | 09/04/2007 |
| 7256311 | Process for hydrogenating unactivated imines using ruthenium complexes as catalysts A process is provided for the hydrogenation or asymmetric hydrogenation of dialkyl, alkylalkenyl and dialkenyl imines of formula (II) to provide amines of formula (III), wherein, (i) R1 and R2 are optionally substituted cyclic, linear or branch... | 08/14/2007 |
| 7256312 | Method for producing aminoalkoxy benzylamines and aminoalkoxy benzonitriles as intermediates The invention relates to a process for preparing 4-[aminoalkoxy]benzylamines of the general formula (I) by catalytically hydrogenating 4-[aminoalkoxy]benzonitriles of the general formula (II) ... | 08/14/2007 |
| 7244860 | Substituted ferrocenyldiphosphines as ligands for homogeneous hyrogeneration catalysts Compounds of the formula (I), in which R1 is C1-C4alkyl, C6-C10aryi or C7-C11, aralkyl, R2 is an open-chain or cyclic secondary amino group, and R is a radical of the formula in ... | 07/17/2007 |
| 7235694 | Process for preparing 4-aminodiphenylamine A process for preparing 4-aminodiphenylamine having the steps of reacting nitrobenzene and aniline in the presence of a complex base catalyst, hydrogenating the reaction mixture with hydrogen, a powdery composite catalyst, and a hydrogenation solvent; separating, re... | 06/26/2007 |
| 7202378 | Process for producing 5-nitro-3,4-dihydro-1(H)-naphthalinone, 1,5-naphthalenediamine and 1,5-naphthalene diisocyanate The present invention relates to a process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1,5-naphthalenediamine and 1,5-naphthalene diisocyanate, in which 4-(2-nitrophenyl)-n-butyronitrile is converted to 4-(2-nitrophenyl)-n-butyric acid. ... | 04/10/2007 |
| 7202384 | Process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1,5-naphthalenediamine and 1,5-naphthalene diisocyanate The present invention relates to a process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1,5-naphthalenediamine and 1,5-naphthalene diisocyanate, in which 4-(2-nitrophenyl)-n-butyronitrile is converted to 4-(2-nitrophenyl)-n-butyric acid. ... | 04/10/2007 |
| 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 |
| 7196034 | Nickel-iron-silica-alumina The invention is directed to a catalyst suitable for the hydrogenation of hydrocarbon resins, comprising a supported nickel on silica and alumina catalyst, said catalyst having a nickel content of 45 to 85 wt. %, a silicon content, calculated as SiO2, of ... | 03/27/2007 |
| 7193112 | Process for the production of aromatic amines by heterogeneously catalysed hydrogenation The invention describes a process for the production of aromatic amines by the catalytic hydrogenation of aromatic nitro compounds, with the process being characterized by at least one catalytic hydrogenation step and the catalyst consists at least of a monolithic s... | 03/20/2007 |
| 7176333 | Process for preparing 4-aminodiphenylamine The present invention discloses a process for preparing 4-aminodiphenylamine, which process uses nitrobenzene and aniline as raw materials, a complex base catalyst as condensation catalyst and a powdery composite catalyst as hydrogenation catalyst, and comprises fiv... | 02/13/2007 |
| 7154006 | Preparation of fluorinated anilines The invention relates to a process for preparing fluorinated anilines starting from the corresponding chlorinated anilines, and also to the use of the fluorinated anilines. ... | 12/26/2006 |
| 7129378 | Method of preparing amine stereoisomers This invention provides a method of preparing amine stereoisomers, which comprises stereoselectively reducing a sulfinylimine that bears on the sulfinyl group a residue of an alcohol, thiol or amine, or reacting a sulfinylimine stereoisomer that bears on the sulfiny... | 10/31/2006 |
| 7119230 | Process for production of xylylenediamine and/or cyanobenzylamine In the process of the present invention, xylylenediamine and/or cyanobenzylamine is produced by a catalytic liquid-phase hydrogenation of a phthalonitrile compound. The liquid-phase hydrogenation is performed by controlling the concentration of a benzamide compound ... | 10/10/2006 |
| 7084302 | Process for preparing 4-aminodiphenylamine A process for preparing 4-aminodiphenylamine using nitrobenzene and aniline as raw materials, a complex base catalyst as the condensation catalyst, and a powdery composite catalyst as the hydrogenation catalyst. The process has 5 process stages including condensatio... | 08/01/2006 |
| 7057071 | Process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1-5-naphthalenediamine and 1,5-naphthalene diisocyanate The present invention relates to a process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1,5-naphthalenediamine and 1,5-naphthalene diisocyanate, in which 4-(2-nitrophenyl)-n-butyronitrile is converted to 4-(2-nitrophenyl)-n-butyric acid. ... | 06/06/2006 |
| 7056485 | Continuous hydrogenation process The invention is directed to a continuous hydrogenation process in which a hydrogenable compound is dissolved in a working solution with hydrogen and a heterogeneous catalyst. At least part of the hydrogen-containing waste hydrogenation gas generated in the reaction... | 06/06/2006 |
| 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 |
| 6903082 | Methods of treating inflammatory conditions of the gastrointestinal tract using 4-APAA and compositions thereof Compounds are disclosed having the structure of Formula I: where R1, R3, and R4 are independently hydrogen or C1 to C4 alkyl, and R2 is: | 06/07/2005 |
| 6894190 | Process for producing optically active 3,3,3-trifluoro-2-hydroxy-2-methylpropionic acid, and salt thereof There are disclosed imine compounds of formula (7) and (11), and processes for preparing the same: ... | 05/17/2005 |
| 6894189 | Methods of preparing didesmethylsibutramine and other sibutramine derivatives This invention encompasses novel methods of preparing sibutramine and sibutramine derivatives, and stereomerically pure sibutramine derivatives in particular. Examples of sibutramine derivatives include, but are not limited to, sibutramine metabolites such as desmet... | 05/17/2005 |
| 6894192 | Process for production of xylylenediamine In the process of the present invention for producing a xylylenediamine by a liquid-phase hydrogenation of a dicyanobenzene in the presence of a catalyst, the catalyst having its activity decreased during the course of use in the hydrogenation is reactivated and a p... | 05/17/2005 |
| 6881864 | Production method of xylylenediamine In the method of the present invention, xylylenediamine is produced by a two-stage hydrogenation of a dicyanobenzene compound. In a first stage (a), the hydrogenation is performed until a conversion of nitrile groups reaches 90 mol % or higher and less than 99.9 mol... | 04/19/2005 |
| 6822118 | Process for the hydrogenation of imines A process for the hydrogenation of imines with hydrogen under elevated pressure in the presence of iridium catalysts and with or without an inert solvent, wherein the reaction mixture contains an ammonium or metal chloride, bromide or iodide and additionally an acid... | 11/23/2004 |
| 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 |
| 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 |
| 6737554 | Process for the production of a dinitronaphthalene isomer mixture with a high proportion of 1,5-dinitronaphthalene The present invention relates to a process for the production of a dinitronaphthalene isomer mixture, in which naphthalene and/or 1-nitronaphthalene is reacted with nitric acid in the presence of a zeolite. ... | 05/18/2004 |
| 6706217 | Liquid antiozonants and rubber compositions containing same Liquid antiozonant mixtures obtained from the process comprising simultaneously reacting at least one unsubstituted and/or substituted paraphenylenediamine compound with a carbonyl compound mixture comprising acetone and at least one other carbonyl compound selected... | 03/16/2004 |
| 6706216 | Liquid antiozonants and rubber compositions containing same Liquid antiozonant mixtures obtained from the process comprising simultaneously reacting at least one unsubstituted and/or substituted paraphenylenediamine compound with a carbonyl compound mixture comprising acetone and at least one other carbonyl compound selected... | 03/16/2004 |
| 6683214 | Process for producing -aminoketones An amino group of an -amino acid ester is protected as an imine, and it is then reacted with a halomethyllithium to obtain an N-protected--aminohalomethylketone. Further, this N-protected--aminohalomethylketone is treated with an acid... | 01/27/2004 |
