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| Number | Title | Issue Date |
| 7671236 | Process for production of cyclohexanone oxime Provided is a process of producing cyclohexanone oxime comprising the steps of: pre-mixing an inorganic process solution containing a high concentration of hydroxylamine phosphate with a first stream of cyclohexanone such that the concentration of hydroxylamine phos... | 03/02/2010 |
| 7423178 | Process for treating an organic solution comprising cyclohexanone oxime, cyclohexanone, and an organic solvent The invention relates to a process for treating an organic solution comprising cyclohexanone oxime, cyclohexanone and an organic solvent, said process comprising distilling the organic solution such as to obtain (i) a first product comprising organic solvent, (ii) a... | 09/09/2008 |
| 7408081 | Process for treating an aqueous medium containing cyclohexanone oxime and cyclohexanone The invention relates to a process for treating an aqueous medium containing cyclohexanone oxime and cyclohexanone, said process comprising stripping the aqueous medium with steam, wherein said stripping is carried out at a pressure higher than 0.11 MPa. The inventi... | 08/05/2008 |
| 7408080 | Process for ammoximation of carbonyl compounds The present invention discloses a process for the ammoximation of carbonyl compounds, wherein a reaction in a liquid reaction system comprising a carbonyl compound, ammonia and hydrogen peroxide is carried out in the presence of a sillicon-containing catalyst, chara... | 08/05/2008 |
| 7396959 | Process for preparing symmetrical and unsymmetrical N,N-dihydrocarbylhydroxylamines A process for preparing N,N-dihydrocarbylhydroxylamines of the general formula (I) where R1, R2, R3 and R4 are selected independently from among hydrogen, aliphatic, cycloaliphati... | 07/08/2008 |
| 7309801 | Process for treating an aqueous medium containing phosphate, cyclohexanone and cyclohexanone oxime The invention relates to a process for treating an aqueous medium containing (i) phosphate and (ii) cyclohexanone and/or cyclohexanone oxime, said process comprising: feeding the aqueous medium to a stripping zone; passing steam through the aqueous medi... | 12/18/2007 |
| 7164047 | Processes for preparation of cyclopropylethanol, cyclopropylacetonitorile and intermediates of both A process for preparation of cyclopropylethanol, which comprises subjecting a 3-cyclopropyl-2,3-epoxypropionic acid ester to solvolysis, treating the product of the solvolysis with an acid to obtain cyclopropylacetaldehyde, and reducing the obtained cyclopropylaceta... | 01/16/2007 |
| 7161037 | Process for treating an aqueous medium containing phosphate salt and organic compounds The invention relates to a process for preparing nitric acid by treating an aqueous medium containing organic compounds and phosphate, said process comprising: feeding the aqueous medium to a nitric acid synthesis zone; forming nitric acid ... | 01/09/2007 |
| 7148381 | Process for the activation of zeolitic catalysts containing titanium and their use in oxidation reactions A process is described for the activation of zeolitic catalysts containing titanium having the formula: xTiO2(1-x)SiO2 wherein x ranges from 0.0001 to 0.4, which consists in treating said materials with a solution of an ammonium salt of a carbo... | 12/12/2006 |
| 7005547 | Process for the preparation of cyclohexanone oxime The invention relates to a process for the production of cyclohexanone oxime in which a phosphate-containing aqueous reaction medium is cycled from a hydroxylammonium synthesis zone to a cyclohexanone oxime synthesis zone and back to the hydroxylammonium synthesis z... | 02/28/2006 |
| 6958418 | Process for preparing vanillylamine hydrochloride Process for preparing vanillylamine or one of the salts thereof by reacting vanillin with hydroxylamine or the salts thereof in the presence of an organic salt, which may optionally be produced in situ, wherein the reaction is carried out in an inorganic or organic ... | 10/25/2005 |
| 6927308 | Method for synthesis of oximes An oxime is synthesized by ammoximation of a carbonyl compound. In stage (i) of the process, a carbonyl compound containing 6 to 20 C atoms is reacted with ammonia and hydrogen peroxide in the presence of a) an organic solvent that is a1) at least partly water-solub... | 08/09/2005 |
| 6906223 | Method for the production of trioxime derivatives The present invention relates to a process for preparing trioxime derivatives of the formula I in which the substituents R1 and R2 are identical or different and each is cyano, alkyl, haloalkyl or... | 06/14/2005 |
| 6844469 | Process for the production of cyclohexanone oxime The invention relates to a process for the production of cyclohexanone oxime in which a phosphate-containing aqueous reaction medium is cycled from a hydroxylammonium synthesis zone to a cyclohexanone oxime synthesis zone and back to the hydroxylammonium synthesis z... | 01/18/2005 |
| 6664422 | Process for the preparation of strobilurin intermediates The present invention relates to a novel improved process and intermediates for the process of preparing the oxime intermediates of formula (II) wherein R1 is hydrogen, fluoro or chloro, and R2 is methyl, ethyl, methoxy, ethoxy, trif... | 12/16/2003 |
| 6649140 | Process for the continuous production of hydrogen peroxide A process is described for the continuous production of alcoholic or hydro-alcoholic solutions of hydrogen peroxide in a concentration ranging from 2 to 10% by weight and their direct use in oxidation processes. The process operates under high safety condition... | 11/18/2003 |
| 6639108 | Ammoximation of ketones and work-up by pervaporation/vapor permeation A process for the work-up of a reaction mixture formed by ammoximation of a ketone, in particular an alkanone or cycloalkanone, by means of hydrogen peroxide and ammonia in homogeneous solution over a titanium-containing catalyst. It comprises the substep... | 10/28/2003 |
| 6620970 | Work-up of the ammoximation products of ketones by liquid-liquid extraction in a ternary solvent system The present invention relates to a process for working up an ammoximation reaction mixture, by separating a catalyst from the reaction mixture, removing the ketone oxime product, discharging the water of the reaction, and recirculating a solvent, where th... | 09/16/2003 |
| 6566555 | Process for preparing oximes Oximes are prepared by reacting carbonyl compounds, hydrogen peroxide and ammonia in the presence of a catalyst system comprising a catalyst comprising titanium, silicon and oxygen and a cocatalyst comprising an acidic solid comprising an organic or inorg... | 05/20/2003 |
| 6462235 | Process for production of oximes cocatalyzed by ammonium salts or substituted ammonium salts Oximes are produced in high yields and with high selectivity by reacting aldehydes or ketones with hydrogen peroxide and ammonia in the presence of a heterogeneous catalyst and an ammonium salt or substituted ammonium salt. The heterogeneous catalyst is s... | 10/08/2002 |
| 6344589 | Method and intermediate products for producing bis(oxime)monoethers A process for preparing bis(oxime) monoethers of the formula I, ##STR1## where: R1 is unsbustituted C1 -C4 -alkyl or C2 -C4 -alkenyl-, C2 -C4 -alkynyl- or phenyl-substituted methyl; R... | 02/05/2002 |
| 6342635 | Ketoximes, processes therefor, and copper extraction process Ketoximes, processes for their preparation, compositions containing them, and a copper extraction process using the compositions. One process for the preparation of the ketoximes comprises the following steps: A) reacting a phenol with a monocarboxylic acid, m... | 01/29/2002 |
| 6284213 | Catalyst, process for the production of hydrogen peroxide and its use in oxidation processes The present invention relates to a catalyst consisting of a metal of the VIII group supported on acid activated carbon functionalized with sulfonic groups, a process for the synthesis of hydrogen peroxide from hydrogen and oxygen which uses said catalyst ... | 09/04/2001 |
| 6235935 | Method of manufacturing high purity oximes from aqueous hydroxylamine and ketones High purity oximes are prepared from aqueous hydroxylamine and ketones reacted at ambient temperature without addition of impurities such as salts or acids.... | 05/22/2001 |
| 6207863 | Synthesis of haloformimine compounds Disclosed is an improved method for the preparation of highly pure haloformimine compounds in high yields by reacting a formimine compound in a solvent with a halogenating agent while maintaining the pH of the halogenation reaction in the range of 2 to 5.... | 03/27/2001 |
| 6111139 | Process for the preparation of trifluoropropanal A compound having the formula 3,3,3-trifluoropropanal oxime, and an improved process for forming 3,3,3-trifluoropropanal and its oxime. The process for producing 3,3,3-trifluoropropanal involves reacting an alkali or alkaline earth metal salt of an alcoho... | 08/29/2000 |
| 5969185 | Process for making phenolic ketones A process for making a phenolic ketone involving reacting a metal aryloxide with an aliphatic aldehyde having from at least 2 to about 25 carbon atoms.... | 10/19/1999 |
| 5502254 | Method for the preparation of 2-hydroxyarylaldoximes A method for the preparation of a 2-hydroxyarylaldoxime which comprises reacting hydroxylamine with a 2-hydroxyarylaldehyde, said reaction being performed in the presence of a compound of a metal of Group II, Group III, Group IVA or Group VIA of the Perio... | 03/26/1996 |
| 5488162 | Process for preparing o-alkylhydroxylamine salts without the isolation of intermediates This invention relates to a process for preparing aqueous solutions of O-alkylhydroxylamine salts. The process involves converting hydroxylamine salts to their O-alkyl derivatives without the isolation of intermediates. More specifically, the process invo... | 01/30/1996 |
| 5488161 | Oximation process An improved process for oximation of carbonyl compounds, such as ketones and aldehydes by oximation with hydroxylamine including oximation processes carried out in the presence of a catalytic amount of a phase transfer catalyst comprised of a mixture of a... | 01/30/1996 |
| 5434307 | Synthesis of 12-oxododecanoic acid oxime from vernolic acid A process for producing 12-oxododecanoic acid oxime, a novel compound which can be used as a raw material in several industrial processes, is disclosed. The disclosed process relies on a renewable raw material, vernolic (cis-12,13-epoxy-cis-9-octadecenoic... | 07/18/1995 |
| 5426231 | Process for producing aminopropanols This invention relates to an improved process for the preparation of 3-aminopropanol and a primary amine by reacting a cyanoethyl ketoxime with hydrogen in the presence of a hydrogenation catalyst to generate the primary amine and aminopropanol. The seque... | 06/20/1995 |
| 5399761 | Method for the preparation of 2-hydroxyarylaldoximes A method for the preparation of a 2-hydroxyarylaldoxime which comprises reacting hydroxylamine with a 2-hydroxyarylaldehyde, said reaction being performed in the presence of a compound of a metal of Group II, Group III, Group IVA or Group VIA of the Perio... | 03/21/1995 |
| 5364609 | Process for the preparation and processing of a hydroxylammonium salt solution A process for the preparation and processing of a hydroxylammonium salt solution involves maintaining an aqueous acid reaction medium circulation between a hydroxylammonium salt synthesis zone and an oxime synthesis zone; continuously supplying nitrate io... | 11/15/1994 |
| 5349088 | Oximation process An improved process for oximation of carbonyl compounds, such as ketones and aldehydes by oximation with hydroxylamine including oximation processes carried out in the presence of a catalytic amount of an alkyl phenol phase transfer catalyst, such as nony... | 09/20/1994 |
| 5334762 | Method for accelerating oxime production A method for preparing oximes where an aldehyde or ketone is reacted with hydroxylamine or its salt in the presence of a catalytic amount of an organotin(IV) compound such as monoalkyltin(IV), dialkyltin(IV) and aryltin(IV). The organotin(IV) compound is ... | 08/02/1994 |
| 5319142 | Process for preparing substituted and unsubstituted arylalkylamines An arylisonitrosoalkanone is hydrogenated in the presence of a noble metal catalyst and a weak carboxylic acid to form an arylalkanolamine which is then hydrogenated in the presence of a strong mineral acid and the transition metal catalyst to form an ary... | 06/07/1994 |
| 5312987 | Two-step process for liquid-phase production of oximes Two-step process in the liquid phase for producing oximes at 60°-100° C. and 1.5-5 bars, which comprises: (a) in a primary step, ammoximating a carbonylic compound with H2 O2 and NH3 in the presence of a silicon, titanium and... | 05/17/1994 |
| 5300690 | Polyoxime derived from carbon monoxide-propylene polyketone A polyoxime can be formed by reacting hydroxylamine with a copolymer of carbon monoxide and propylene. When the relative amount of oxime units in the polyoxime is high the polyoxime is soluble in water. Conversely, solubility in organic solvent is conferr... | 04/05/1994 |
| 5300689 | Oximation process An improved process for oximation of carbonyl compounds, such as ketones and aldehydes by oximation with hydroxylamine including oximation processes carried out in the presence of a catalytic amount of an acid phase transfer catalyst, such as 2-ethylhexan... | 04/05/1994 |
