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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7468461 | Method for the production of amines The present invention provides a process for hydrogenating aromatic nitro compounds to the corresponding amines in the presence of hydrogenation catalysts, which comprises using hydrogenation catalysts in which nickel and platinum are present on a support in the for... | 12/23/2008 |
| 7282610 | Method of producing aromatic amine compound having alkylthio group A method of producing an aromatic amine compound, that includes reducing an aromatic nitro compound that has an aromatic ring having an alkylthio group as a substituent, to obtain a corresponding aromatic amine compound, wherein the aromatic nitro compound is reduce... | 10/16/2007 |
| 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 |
| 7208136 | Alcohol steam reforming catalysts and methods of alcohol steam reforming The present invention provides steam reforming catalyst compositions containing Pd and Zn, and methods of steam reforming alcohols over a catalyst. Surprisingly superior results and properties of the present invention, including low temperature activity and/or low c... | 04/24/2007 |
| 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 |
| 7183439 | Process for preparing 4-aminodiphenylamine intermediates The invention is directed to a method of producing one or more 4-aminodiphenylamine intermediates comprising the steps: a. bringing an aniline or aniline derivative and nitrobenzene into reactive contact; and b. re... | 02/27/2007 |
| 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 |
| 7109378 | Monolith catalytic reactor coupled to static mixer The invention pertains to an improved apparatus comprised of a monolith catalytic reactor having an inlet and an outlet and a static mixer having an inlet and an outlet thereto with the outlet of said static mixer in communication with the inlet of said monolith cat... | 09/19/2006 |
| 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 |
| 7064237 | Method for the production of amines Amines are prepared by hydrogenation of the corresponding nitroaromatics in a vertical reactor whose length is greater than its diameter and which has in its upper region a downward-directed jet nozzle via which the reaction mixture and, if desired, part of the star... | 06/20/2006 |
| 7045647 | Blends of quinone alkide and nitroxyl compounds and polymerization inhibitors Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of: A) at least one nitroxyl compound, and B) at least one quinone alkide compound having an electro... | 05/16/2006 |
| 7022220 | C-nitrosoaniline compounds and their blends as polymerization inhibitors Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of at least one inhibitor selected from the group consisting of C-nitrosoaniline and quinone imine o... | 04/04/2006 |
| 7014750 | System and process for pyrolysis gasoline hydrotreatment Systems and processes for the hydrotreatment of pyrolysis gasoline comprising reactors, monolithic catalyst beds and hydrogen-containing treatment gases that allow for improved efficiency and productivity over conventional trickle bed processes and systems for such ... | 03/21/2006 |
| 6965053 | Process for the production of aromatic amines A process for the production of aromatic amines which comprises the reduction of an aromatic compound containing at least two nitro groups with hydrogen in the presence of a catalyst is disclosed. The reaction is carried out so as to maintain up to 10% by weight of ... | 11/15/2005 |
| 6958419 | Alkynyl S,N-acetal derivative and method of producing the same An alkynyl S,N-acetal derivative of the present invention is represented by the following structural formula: In the structural formula, R1 represents a hydrogen atom, an alkyl group, an aryl group, an alken... | 10/25/2005 |
| 6946577 | Process for the production of aminodiphenylamines The present invention relates to a process for the production of aminodiphenyl-amines, such as 4-aminodiphenylamine (4-ADPA), by reacting nitrohalogenated benzenes with anilines in the presence of a base as well as a copper-phosphorus complex, followed by hydrogenat... | 09/20/2005 |
| 6936568 | Selective hydrogenation catalyst A catalyst for selective hydrogenation of acetylene including a high surface area support material with a surface area at least about 150 m2/g and gold wherein the gold comprises from about 0.05 to about 5.0 weight percent of the catalyst and wherein the ... | 08/30/2005 |
| 6902663 | C-nitrosoaniline compounds and their blends as polymerization inhibitors Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of at least one inhibitor selected from the group consisting of C-nitrosoaniline and quinone imine o... | 06/07/2005 |
| 6894193 | Method for hydrogenating liquid organic compounds Liquid organic compounds are hydrogenated by a process in which the hydrogen present in the reactor contains proportions of at least one gas which is inert in the hydrogenation reaction. ... | 05/17/2005 |
| 6818720 | Supported hydrogenating catalyst in powder form Supported, hydrogenating catalyst in powder form containing, as a catalytically active component, a primary precious metal component, a secondary precious metal component and one or more non-precious metal components. It is used for the hydrogenation of nitroaromati... | 11/16/2004 |
| 6815562 | Process for the preparation of nitrodiphenylamines The present invention relates to a process for the preparation of nitrodiphenylamines by reaction of nitrohalogens with anilines, a base and a catalyst, and to a process for the preparation of aminodiphenylamine by hydrogenation of the nitrodiphenylamine intermediat... | 11/09/2004 |
| 6762324 | Metal modified Pd/Ni catalysts This invention relates to improved catalytic compositions suited for use in hydrogenation processes and to an improved process for hydrogenating organic compounds as in amination of alcohols or hydrogenation of nitro groups to the amine using the catalyst. The catal... | 07/13/2004 |
| 6703525 | Sulfonamide intermediates and methods of producing same Disclosed are intermediates of the formula (A) and methods of making same. The intermediate compounds are useful in the synthesis of heteroaryl/aryl urea compounds, ##STR1##... | 03/09/2004 |
| 6583320 | Process for preparing 4-aminodiphenylamine intermediates The invention is directed-to a method of producing one or more 4-aminodiphenylamine intermediates comprising the steps of bringing an aniline or aniline derivative and nitrobenzene into reactive contact and reacting the aniline and nitrobenzene in a confi... | 06/24/2003 |
| 6521791 | Process for regenerating a monolith hydrogenation catalytic reactor The invention is a process to regenerate monolith catalytic reactors employed in the liquid phase hydrogenation reactions, particularly those kinds of reactions involving nitroaromatic compounds. The catalytic metals in the monolith catalytic reactor are ... | 02/18/2003 |
| 6495723 | Zeolite support loaded with a base material for use in the coupling of aniline and nitrobenzene This invention provides a composition suitable for use in a reaction zone where aniline is reacted with nitrobenzene to obtain intermediates of 4-aminodiphenylamine comprising a solid support having interior channels with base material employed in the rea... | 12/17/2002 |
| 6479704 | Hydrogenation with monolith reactor under conditions of immiscible liquid phases The present invention relates to an improved for the hydrogenation of an immiscible mixture of an organic reactant in water. The immiscible mixture can result from the generation of water by the hydrogenation reaction itself or, by the addition of, water ... | 11/12/2002 |
| 6429337 | Promoted porous catalyst A novel precious metal doped porous metal catalyst is disclosed. The precious metal is present in from 0.01 to 1.5 weight percent and distributed throughout the particles of porous metal to provide a surface to bulk ratio distribution of not greater than ... | 08/06/2002 |
| 6423872 | Continuous Ni/low A1 catalyzed hydrogenation of aromatic nitro compounds Nitrated aromatic compounds are continuously catalytically hydrogenated into their corresponding aromatic amines in the presence of an effective amount of a nickel or nickel/aluminum catalyst, the nickel catalyst being essentially devoid of aluminum value... | 07/23/2002 |
| 6414192 | Process for preparing 4-aminodiphenylamine The invention provides a process for preparing 4-aminodiphenylamine, an important starting product for synthesizing antioxidants and stabilizers in the rubber and polymer industry, by hydrogenating nitrosobenzene with hydrogen in the presence of a proton ... | 07/02/2002 |
| 6403833 | Single step hydrogenation of nitrobenzene to p-aminophenol The present invention provides a single step process for the preparation of p-aminophenol by hydrogenation of nitrobenzene in presence of an aqueous acid over a mono or bimetallic nickel catalyst at a temperature in the range of 80-120° C. for a period o... | 06/11/2002 |
| 6395934 | Raney nickel catalysts, a method for producing said raney nickel catalysts and the use of the same for hydrogenating organic compounds Raney nickel catalysts obtainable by a process in which the melt of an alloy comprising 50 to 94 wt. % aluminum, 10 to 50 wt. % nickel, 0 to 20 wt. % iron, 0 to 15 wt. % cerium, cerium mixed metal, vanadium, niobium, tantalum, chromium, molybdenum or mang... | 05/28/2002 |
| 6395933 | Process for preparing 4-aminodiphenylamine intermediates The invention is directed to a method of producing one or more 4-aminodiphenylamine intermediates comprising the steps of bringing an aniline or aniline derivative and nitrobenzene into reactive contact; and reacting the aniline and nitrobenzene in a conf... | 05/28/2002 |
| 6350911 | Method for producing amines The invention relates to a process for the preparation of amines by hydrogenation of nitro compounds, which comprises carrying out the hydrogenation in a vertical reactor whose length is greater than its diameter, having a downward-facing jet nozzle arran... | 02/26/2002 |
| 6316673 | Process for producing aminodiphenylamines The present invention relates to the production of aminodiphenyl-amines resulting in good yields and high purity levels when aromatic amines are reacted with nitrohalobenzenes in the presence of a palladium catalyst and a base and the product thus obtaine... | 11/13/2001 |
| 6307116 | Transition metal aerogel-supported catalyst A process for preparing a supported catalyst comprising a transition metal selected from palladium, platinum, nickel, cobalt or copper on an aerogel support, which includes the steps of providing a mixture containing an alkoxide precursor of the aerogel, ... | 10/23/2001 |
| 6258982 | Process for the preparation of substituted aromatic amino compounds The present invention relates to a hydrogenation process for the preparation of aromatic amino compounds containing directly on the aryl ring or in a side chain one or more entities that may also undergo hydrogenation, such as carbon multiple bonds, nitri... | 07/10/2001 |
| 6245943 | Method of preparing p-phenylenediamine A disclosed method of preparing p-phenylenediamine includes the steps of: reacting urea and nitrobenzene with a base in the presence of a polar solvent to yield 4-nitrosoaniline and 4-nitroaniline; and subsequently, diluting the resulting mixed solution i... | 06/12/2001 |
| 6242649 | Continuous method for producing aromatic amines A continuous process for the preparation of aromatic di- and/or polyamines by catalytic hydrogenation of the corresponding aromatic di- and/or polynitro compounds with hydrogen, characterized in that, in a reactor with a catalytic fixed bed or trickle bed... | 06/05/2001 |
| 6204413 | Process for the preparation of salts of 1-substituted 2,4-diaminobenzenes The invention relates to a process for the preparation of specific salts of 1-substituted 2,4-diaminobenzenes by catalytic hydrogenation of 1-substituted 2,4-dinitrobenzenes and addition of the reaction product obtained after the hydrogenation and separat... | 03/20/2001 |
