Quotables
"It is my heart-warmed and world-embracing Christmas hope and aspiration that all of us, the high, the low, the rich, the poor, the admired, the despised, the loved, the hated, the civilized, the savage (every man and brother of us all throughout the whole earth), may eventually be gathered together in a heaven of everlasting rest and peace and bliss, except the inventor of the telephone. "
Mark Twain ; Christmas greetings, 1890
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 |
| 7696391 | System and process for production of nitrobenzene A method for producing nitrobenzene is disclosed which comprises forming a dispersion comprising benzene-containing droplets or particles dispersed in a mixture of concentrated nitric acid and concentrated sulfuric acid, wherein said particles have a mean diameter l... | 04/13/2010 |
| 7326816 | Process for the production of nitrobenzene Nitrobenzene is produced and then purified using an acidic wash, an alkaline wash, a neutral wash, subjecting a dispersion formed in the neutral wash to electrophoresis to separate water and benzene from the nitrobenzene and recover purified nitrobenzene. ... | 02/05/2008 |
| 7303732 | Tubular reactor having static mixing elements separated by coalescing zones A tubular reactor characterized by having short static mixing elements separated by coalescing zones is used to conduct multiphase liquid/liquid reactions. Small droplets of one of the phases are dispersed into the other phase by the static mixing elements. These dr... | 12/04/2007 |
| 7118920 | Multiphasic microchannel reactions Multiphasic reactions, especially those reactions using a phase transfer catalyst, are conducted in microchannel apparatus. Advantageously, these reactions can be conducted with two, planar microlayers of reactants in adjacent laminar flow streams. Microchannel appa... | 10/10/2006 |
| 6953869 | Process for working up secondary components in the preparation of dinitrotoluene The present invention relates to a process for working up organic secondary components which are formed in the one-stage or two-stage nitration of toluene to dinitrotoluene. These organic secondary components are present in the acidic and alkaline waste water from t... | 10/11/2005 |
| 6936741 | Process for working up the waste water obtained in the preparation of dinitrotoluene The present invention relates to a process for working up or treating aqueous waste waters which are formed during the nitration of toluene to dinitrotoluene with nitrating acid. These aqueous waste waters containing acidic wash water and alkaline wash water from th... | 08/30/2005 |
| 6906231 | Aromatic nitration reactions A process for the nitration of an aromatic compound, wherein the aromatic compound is admixed with a nitrating agent in the presence of an ionic liquid is described. The method for the nitration of aromatic compounds in (e.g. neutral) ionic liquids has advantages ov... | 06/14/2005 |
| 6791000 | Process for vapor phase nitration of benzene using nitric acid over molybdenum silica catalyst Nitration of benzene is an important reaction for the production of nitro benzene, which is an important intermediate in chemical and pharmaceutical industries. Conventionally nitrobenzene is produced by liquid phase reactions employing mixed acids. A sulfuric acid/... | 09/14/2004 |
| 6768032 | Continuous isothermal process for preparing mononitrotoluenes in the presence of phosphoric acid The present invention relates to a continuous isothermal process for preparing mononitrotoluenes in the presence of a mixed acid component comprising mixtures of sulfuric acid and phosphoric acid with concentration of the resultant waste acid and recycling of the co... | 07/27/2004 |
| 6756504 | Sphingolipids The invention relates to compounds of the general formula (I), as defined, and to pharmaceutical compositions containing them. The compounds of formula (I) are inhibitors of various lipid-related enzymes. They can be used in reducing accumulation of sphingoli... | 06/29/2004 |
| 6703532 | Process for the nitration of xylene isomers using zeolite beta catalyst This invention relates to a process for the nitration of xylene isomers by using zeolite-beta as a catalyst. This invention particularly relates to a process for the nitration of xylenes using solid acid catalyst, thus totally eliminating the disposal of ... | 03/09/2004 |
| 6583327 | Continuous isothermal process for preparing mononitrotoluenes The present invention relates to a process for the continuous isothermal preparation of mononitrotoluenes with concentration of the resultant waste sulfuric acid and recycling of the concentrated waste sulfuric acid to the process.... | 06/24/2003 |
| 6515189 | Reactions of aromatic compounds A method of reacting an aromatic compound with an immiscible reacting agent involves the passage of the reactant along a flow path having a width of from 10 to 1000 μm in such a way that essentially laminar flow of the reactant takes place. Reaction take... | 02/04/2003 |
| 6515190 | Sol-gel derived porous microcomposite of perfluorinated ion-exchange polymer and metal oxide Porous microcomposites have been prepared from perfluorinated ion-exchange polymer and metal oxides such as silica using the sol-gel process. Such microcomposites possess high surface area and exhibit extremely high catalytic activity.... | 02/04/2003 |
| 6506949 | Process for ring nitrating aromatic compounds in a tubular reactor having static mixing elements separated by coalescing zones A tubular reactor characterized by having short static mixing elements separated by coalescing zones is used to conduct multiphase liquid/liquid reactions. Small droplets of one of the phases are dispersed into the other phase by the static mixing element... | 01/14/2003 |
| 6506948 | Toluene extraction of dinitrotoluene wash water This invention relates to an improvement in a process for the production of dinitrotoluene and particularly to the recovery of dinitrotoluene and organic by-products from the wastewater and wash waters generated in the process. Wastewater and wash water s... | 01/14/2003 |
| 6362381 | Nitration of aromatic hydrocarbons Aromatic hydrocarbons are nitrated by a process in which the aromatic hydrocarbon is reacted in the liquid phase with an oxide of nitrogen selected from NO, N2 O3, NO2 and N2 O4 and with an oxygen-con... | 03/26/2002 |
| 6329529 | Nitrogen-based halogenating agents and process for preparing halogen-containing compounds Disclosed are a fluorinating agent represented by the general formula (1): ##STR1## wherein R1 to R4 are a substituted or unsubstituted, saturated or unsaturated alkyl group or a substituted or unsubstituted aryl group, and can be th... | 12/11/2001 |
| 6316675 | Process for the preparation of an olefin-substituted aromatic or heteroaromatic compound A process for the synthesis of olefins having aromatic substituents is described in which olefins are reacted with aryl halides in the presence of catalysts consisting of palladium compounds and tetraaryl phosphonium salts.... | 11/13/2001 |
| 6303820 | Process for the preparation of nitrosobenzenes The invention relates to a process for the preparation of nitrosobenzenes from aromatic amines by oxidation with hydrogen peroxide in the presence of sodium molybdate dihydrate and an inert organic solvent.... | 10/16/2001 |
| 6291726 | Process for nitration of aromatic compounds using a non-acid type nitration process The nitration of aromatic compounds is achieved in high yield and selectivity by using oxygen activated by an inorganic catalyst and nitrogen dioxide. Since this process uses neither concentration nitric nor sulfuric acids, the generation of spent waste a... | 09/18/2001 |
| 6284894 | Preparation of allylic aromatic compounds A process for the preparation of an allylic aromatic compound in which an aromatic amine is reacted first with a nitrite and then with an allylic olefin having an eliminatable terminal substituent. Novel allylic derivatives of disubstituted benzene compou... | 09/04/2001 |
| 6274775 | Process for the preparation of nitrosobenzenes The invention relates to a process for the preparation of nitrosobenzene from aromatic amines by oxidation with hydrogen peroxide in the presence of a catalyst based on compounds of tungsten and/or molybdenum without the addition of the organic solvents c... | 08/14/2001 |
| 6242657 | Method for producing aromatic nitro compounds In the reaction of aromatic compounds with nitrating acids comprising HNO3 and, if appropriate, H2 SO4 and/or H2 O and/or H3 PO4 to form aromatic nitro compounds, according to the invention... | 06/05/2001 |
| 6127583 | Process for preparing acetylene derivative from a ketone compound A preparation process of an acetylene derivative comprising reacting a compound having a skeleton represented by the formula (1): ##STR1## in the molecular formula with a compound represented by the formula (2): ##STR2## wherein R1, R... | 10/03/2000 |
| 5998661 | Preparations of organic nitro compounds through mixed oxidizing agents A process for selective, direct oxidation of amine or amine hydrochloride mpounds is described. It uses mixed oxidizing agents of monopersulfate and ozone.... | 12/07/1999 |
| 5963878 | Nitration process A continuous process to nitrate a nitratable aromatic compound utilizing nitric acid and sulfuric acid feed stocks is described. The process includes the collecting of NOx O gases with water under pressure to and treating the NOx gas... | 10/05/1999 |
| 5952531 | Nitration process A process for the nitration of an aromatic or heteroaromatic compound with a nitrating agent comprising nitric acid or a mixture of nitric and sulphuric acids, characterised in that nitration is performed in a solvent comprising at least 50% v/v of a C | 09/14/1999 |
| 5886240 | Process for preparing aromatic acetylenes using palladacycles as catalysts The invention relates to a process for preparing aromatic acetylenes of the formula (I): Ar--C.tbd.C--R8a, where Ar is: ##STR1## by reacting haloaromatics or aryl sulfonates of the formula (II): Ar--X, with monosubstituted acetylenes of th... | 03/23/1999 |
| 5847240 | Process for reducing tetranitromethane in compositions containing nitroaromatic compounds A process is disclosed for removing a light organic compound from a liquid composition comprising said light organic compound in admixture with a nitroaromatic compound, said light organic compound having a partial vapor pressure in said composition that ... | 12/08/1998 |
| 5763697 | Process for the nitration of aromatic compounds The selective introduction of a nitro group into an aromatic compound by mixtures of nitric acid and sulphuric acid, wherein the aromatic compound to be nitrated is conveyed to a central driving jet of the acid mixture in such a way that it surrounds the ... | 06/09/1998 |
| 5728901 | Nitration process which employs water tolerant Lewis acid catalysts A process for preparing a nitrated arene which comprises reacting an arene and nitric acid in the presence of a water tolerant Lewis acid catalyst under process conditions sufficient to form the nitrated arene and recovering the nitrated arene. Suitable L... | 03/17/1998 |
| 5648565 | Process for the adiabatic preparation of mononitrotoluenes Mononitrotoluenes can be prepared by intensively mixing together toluene, nitric acid, sulphuric acid and water, simultaneously or successively in their total amount, and, in the case of continuous preparation, redispersing the mixture at least twice, for... | 07/15/1997 |
| 5488187 | Process for the production of dinitrobenzene and mononitrobenzene Aromatic nitration reactions and, more specifically, a process for nitrating benzene to produce dinitrobenzene or mononitrobenzene in the absence of sulfuric acid and in the absence of any dipolar aprotic solvent.... | 01/30/1996 |
| 5399773 | Process for the preparation of nitrophenyl alkyl ethers Nitrophenyl alkyl ethers can be advantageously prepared by reacting a nitrophenol with an alkyl halide in water as the reaction medium in such a manner that the nitrophenol is laid before with the water and the alkyl halide and a hydrogen halide-binding c... | 03/21/1995 |
| 5395995 | Process for the preparation and purification of nitroaromatics A process for the preparation and purification of nitroaromatics by nitration of the corresponding aromatics and subsequent melt crystallization. The residual melts which occur are recycled.... | 03/07/1995 |
| 5329054 | Decarboxylation process Activated carboxylic acids and esters such as pentafluorobenzoic acid are rapidly decarboxylated in high yields by reacting the acid or ester with an alkanolamine reagent which catalyzes the reaction.... | 07/12/1994 |
| 5315043 | Aromatic nucleophilic fluorination A process for halogen exchange fluorination or fluoro-denitration of aromatic compounds having at least one replaceable non-fluorine halogen or nitro substituent with an anhydrous substantially molten alkali metal acid fluoride composition wherein the alk... | 05/24/1994 |
| 5313009 | Nitration process A continuous process to nitrate a nitratable aromatic compound in a nitronium ion solution in a nitrator. The process comprises feeding into the nitrator nitronium ion solution of a composition within an area defined by connecting three points in a ternar... | 05/17/1994 |
| 5270309 | Kynurenic acid derivatives useful in the treatment of neurodegenerative disorders 4-Oxo-1,4-dihydroquinoline compounds having a 2-acidic group or a group convertible thereto in vivo, and their pharmaceutically acceptable salts, are potent specific antagonists of N-methyl-D-aspartate (NMDA) receptors and are therefore useful in the trea... | 12/14/1993 |
