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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 |
| 8071813 | Methods of using ionic liquids having a fluoride anion as solvents A method in one embodiment includes contacting a strongly hydrogen bonded organic material with an ionic liquid having a fluoride anion for solubilizing the strongly hydrogen bonded organic material; and maintaining the ionic liquid at a temperature of about 90° C.... | 12/06/2011 |
| 7989662 | 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... | 08/02/2011 |
| 7772438 | Process of making sertraline form I The present invention discloses novel and improved processes for preparation of sertraline hydrochloride crystalline form II. Thus, for example, sertraline free base is dissolved in isoamyl alcohol at 25-30° C., pH of the mass is adjusted to 2.0 with conc. hydrochl... | 08/10/2010 |
| 7772437 | Process of making sertraline form II The present invention discloses novel and improved processes for preparation of sertraline hydrochloride crystalline form II. Thus, for example, sertraline free base is dissolved in isoamyl alcohol at 25-30° C., pH of the mass is adjusted to 2.0 with conc. hydrochl... | 08/10/2010 |
| 7692042 | Process for preparing aniline Crude aniline is produced by hydrogenating nitrobenzene in the presence of a catalyst. This crude aniline is then purified by means of a single-step or multi-step distillation process in which aqueous alkali metal hydroxide solution is added to the crude aniline pri... | 04/06/2010 |
| 7518019 | Processes for preparing sertraline hydrochloride crystalline forms The present invention discloses novel and improved processes for preparation of sertraline hydrochloride crystalline form II. Thus, for example, sertraline free base is dissolved in isoamyl alcohol at 25-30° C., pH of the mass is adjusted to 2.0 with conc. hydrochl... | 04/14/2009 |
| 7488850 | Process for removing compounds containing phenolic hydroxy groups from aromatic amines Compounds containing phenolic hydroxy groups are removed from a gas stream which contains at least one aromatic amine generated during the gas-phase hydrogenation reaction of the corresponding nitroaromatic compounds with hydrogen, by adsorption on a basic solid. | 02/10/2009 |
| 7390927 | Process for preparing 3-aminophenylacetylenes A process for preparing a 3-aminophenylacetylene compound of formula (5), including: a) reacting a 3-haloaniline compound of formula (1) with an acetylene compound of formula (2) in the presence of a palladium compound, a copper compound, and an amine compound of fo... | 06/24/2008 |
| 7173153 | Sertraline hydrochloride form II and methods for the preparation thereof This invention relates to a method for the preparation of sertraline hydrochloride, (1S-cis)-4-(3,4-dichlorophenyl)-1,2,3,4-tetrahydro-N-methyl-1-naphtalenamine hydrochloride, in its crystalline form II. ... | 02/06/2007 |
| 7147757 | Method for separating an azepine derivative out of a mixture containing an amine an azepine derivative The invention relates to a method for separating by distillation a portion or the entirety of an azeptine derivative (III), which is selected from the group consisting of aminohexylidene imine, tetrahydroazepine, hexylhexahydroazepine and of aminohexylhexahydroazepi... | 12/12/2006 |
| 7145038 | Alkylation of a diphenylamine compound in ionic liquid A process for alkylation of a diphenylamine compound in an ionic liquid. The use of an ionic liquid permits convenient separation of the alkylated reaction product from the reaction mixture. ... | 12/05/2006 |
| 7122700 | Arylamine processes A method for bisformylation an arylamine compound by reacting an arylamine compound with an alkyleneamine in a reaction mixture while refluxing an acid in the reaction mixture. ... | 10/17/2006 |
| 7067700 | Process for preparing sertraline hydrochloride polymorphic form II Sertraline hydrochloride, (1Scis)-4-(3,4-dichlorophenyl)-1,2,3,4-tetrahydro-N-methyl-1-naphtalenaminehydrochloride, polymorph II is prepared by extracting or dissolving the sertraline base into ethyl acetate, adding isopropanol as a solvent, adding hydrogen chloride... | 06/27/2006 |
| 7057072 | Synthesis and purification of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) A method to convert surplus nitroarene explosives (picric acid, ammonium picrate,) into TATB is described. The process comprises three major steps: conversion of picric acid/ammonium picrate into picramide; conversion of picramide to TATB through vicarious nucleophi... | 06/06/2006 |
| 7049471 | Separation of amine from a phenolic compound A process comprises contacting a product mixture with a base, optionally in the presence of a polyhydric alcohol, to produce a base-treated mixture and distilling the base-treated mixture in which the product mixture comprises an aromatic amine and a phenolic compou... | 05/23/2006 |
| 7030276 | Process for preparing 2-[(dimethylamino)-methyl]-1-(3-methoxyphenyl)cyclohexanol A process for preparing 2-[(dimethylamino)methyl]-1-(3-methoxyphenyl)cyclohexanol with high stereoselectivity and high yield by reacting 2-[(dimethylamino)methyl]-cyclohexanone in a Grignard reaction with a Grignard compound of 3-bromoanisole in a suitable solvent a... | 04/18/2006 |
| 7019174 | Preparation of colourless dibenzylamine The invention relates to a process for preparing colourless dibenzylamine by adding ammonium chlorides or amines to the industrially obtained dibenzylamine and subsequent distillation. ... | 03/28/2006 |
| 6972075 | Method for removing 6-aminocapronitrile from mixtures that contain 6-aminocapronitrile, adipodinitrile and hexamethylenediamine The invention relates to a method for removing, by distillation, 6-aminocapronitrile from mixtures that contain 6-aminocapronitrile, adipodinitrile and hexamethylenediamine, by a) removing the hexamethylenediamine from the mixture while obtaining a mixture (I) that ... | 12/06/2005 |
| 6869543 | Amine-initiated polyether polyols and a process for their production Clear, amine-initiated polyether polyols are made by epoxidizing an amine in the presence of an alkali metal hydroxide catalyst. By reducing the amount of catalyst used during the polyol synthesis and by adding the catalyst after between 5 and 30% of the total amoun... | 03/22/2005 |
| 6784320 | Amine recovery method and apparatus and decarbonation apparatus having same In a decarbonation process for removing carbon dioxide from a carbon dioxide-containing gas with the use of an amine compound-containing absorbing solution, an amine compound accompanying a decarbonated exhaust gas is efficiently recovered in the following manner: A... | 08/31/2004 |
| 6639102 | Process for producing polyisocyanates of the diphenyl methane series having a reduced color value Polyisocyanates of the diphenyl methane series having reduced color values are obtained by a) reacting aniline and formaldehyde in the presence of an acid catalyst to form a polyamine, b) neutralizing the reaction mixture containing polyamine with a base,... | 10/28/2003 |
| 6547933 | Process for the purification of aromatic polyamines A process for the purification of a mixture of aromatic polyamines obtained by hydrogenation of the corresponding aromatic polynitro compounds, said mixture including the various isomers of the said amines as well as reaction by-products, including the st... | 04/15/2003 |
| 6515036 | Method of decomposing a polyurethane A method of recovering a decomposition product from a polyurethane, the method comprising the steps of thermally decomposing a polyurethane into a liquid containing a polyol and a urea compound which is soluble in the polyol, and solids containing a urea ... | 02/04/2003 |
| 6469212 | Separation of 2,4-toluenediamine from an isomeric mixture of toluenediamines A mixture comprised of about 60-85% of 2,4-toluenediamine (2,4-TDA) and about 15-40% of 2,6-toluenediamine (2,6-TDA) is melted, the temperature of the mixture is lowered to a 2,4-TDA nucleation temperature, and the temperature of the mixture is gradually ... | 10/22/2002 |
| 6448446 | Synthesis of N,N-disubstituted-p-phenylenediamine An improved synthesis of N,N,-disubstituted-p-phenylene-diamine (DSPDA) preferably di-n-butyl-p-phenylenediamine is disclosed. The improvement rests on the discovery that DSPDA and its salts are extremely sensitive to oxygen so that once the product DSPDA... | 09/10/2002 |
| 6429336 | Process for recovering toluene diamine from toluene diisocyanate distillation residues Residues from the distillation of a toluene diamine phosgenation mixture are hydrolyzed by mixing them with water and subjecting the mixture to a temperature of 200-350 ° C. The hydrolysis is performed in the presence of a sufficient amount of a base to ... | 08/06/2002 |
| 6398917 | Apparatus for the purification of commercially available diphenyl-p-phenylenediamine (DPPD) An apparatus for the purification of crude N,N'-diphenyl-p-phenylenediamine (DPPD) in which there is an extraction unit containing a liquid permeable container and an adsorption layer downstream of the container, a solvent evaporator downstream of the ads... | 06/04/2002 |
| 6384216 | Purification of alkenyl compounds A process for purifying alkenyl compounds having a divalent or trivalent heteroatom in the -position relative to the double bond by distillation comprises carrying out at least two distillations in which the purified alkenyl compounds are obtained ... | 05/07/2002 |
| 6359177 | Process for separating mixtures of materials having different boiling points A mixture of materials having different boiling points is separated into fractions having different boiling points. The separated fraction containing the desired product is stripped using the vapors of a lower boiling fraction. The process of the present ... | 03/19/2002 |
| 6313350 | Form a of fluoxetine hydrochloride The present invention provides novel processes for the preparation of Form A of fluoxetine hydrochloride.... | 11/06/2001 |
| 6310250 | Form A of fluoxetine hydrochloride The present invention provides novel amorphous fluoxetine hydrochloride as a useful intermediate for the preparation of Form A of fluoxetine hydrochloride.... | 10/30/2001 |
| 6310253 | Preparation of 1,3,5-triamino-2,4,6-trinitrobenzene of submicron particle size A method is disclosed for the preparation of very small particle size, relatively pure 1,3,5-triamino-2,4,6-trinitrobenzene (TATB). Particles of TATB prepared according to the disclosed method are of submicron size and have a surface area in the range fro... | 10/30/2001 |
| 6310251 | Form a of fluoxetine hydrochloride The present invention provides novel processes for the preparation of Form A of fluoxetine hydrochloride.... | 10/30/2001 |
| 6252115 | Method for separating an imine from a mixture containing an amine and an imine A process for distillative separation of part or all of an imine (III) from a mixture (II) comprising an amine (I) and said imine (III) comprises adding to the distillation mixture a compound (IV) which is inert toward said amine (I) under distillation co... | 06/26/2001 |
| 6251229 | Process for the separation of 2-aminomethylcyclopentylamine from a mixture containing hexamethyldiamine and 2-aminomethylcyclopentylamine A process for separating 2-aminomethylcyclopentylamine from a mixture consisting of hexamethylenediamine and 2-aminomethylcyclopentylamine by distilling the mixture at a pressure from 1 to 300 mbar.... | 06/26/2001 |
| 6242650 | Process for the decoloration of aqueous effluents comprising aromatic amines The subject of the present invention is a process for the decoloration of aqueous effluents comprising aromatic amines or their derivatives, in which process the effluents are brought into contact with at least one agent chosen from alkali metal or alkali... | 06/05/2001 |
| 6225503 | Preparation of 1,3,5-triamo-2,4,6-trinitrobenzene of submicron particle size A method is disclosed for the preparation of very small particle size, relatively pure 1,3,5-triamino-2,4,6-trinitrobenzene (TATB). Particles of TATB prepared according to the disclosed method are of submicron size and have a surface area in the range fro... | 05/01/2001 |
| 6225502 | Use of an aniline depleted in electron to release hydrochloric acid present in a reaction mixture and method for displacing, at least partially, an aniline from its chlorhydrate The invention concerns a method for displacing, at least partially, an aniline from its chlorhydrate, characterized in that said aniline is selected among anilines whereof the conjugate acid has a pKa not more than 6 and in that it consists in a step wher... | 05/01/2001 |
| 6221414 | Process for treating fruits and vegetables after harvesting, with purification of plant-protection products contaminated with aromatic primary amines The invention relates to a process for treating fruit and vegetables after harvesting, using, as plant-protection treatment composition, the mixture with water of the reaction medium resulting from the implementation of steps of purification of a plant-pr... | 04/24/2001 |
| 6118025 | Method for preparing optically active -substituted benzyl alcohols The invention concerns a method for preparing an optically active alcohol of formula (I) in which the carbon atom indicated by the symbol * can have the configuration (R) or (S) and X represents a non-substituted amino group or a mono- or di-(C1 | 09/12/2000 |
