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| Number | Title | Issue Date |
| 8063239 | Process for preparing aminoalkylnitriles and diamines from such nitriles The present invention relates to a process for preparing an aminoalkyl nitrile by reaction of a corresponding monoamine with a corresponding alkenyl nitrile in a continuous mode of operation, which comprises the steps (a) introduction of the correspondi... | 11/22/2011 |
| 7754911 | Method for isolating methyl glycine nitrile-N,N-diacetonitriles from an aqueous crude mixture The invention relates to a process for isolating methylglycinenitrile-N,N-diacetonitrile (MGDN) from an aqueous emulsion which comprises MGDN and has an MGDN content of 3-50% by weight in a crystallizer, comprising the steps: (a) t... | 07/13/2010 |
| 7674929 | Method for the production of β-aminopropionic acid derivatives The invention relates to a process for preparing β-aminopropionic acid derivatives by reacting a primary or secondary amine with an acrylic acid derivative, wherein comprises (i) a first primary or secondary amine is provided as an amine of value and r... | 03/09/2010 |
| 7385073 | Method for reducing the content of an unsaturated amine in a mixture containing an amino nitrile, a diamine, a dinitrile or mixtures thereof A process for reducing the level of an aliphatic monounsaturated amine (IV) in a mixture (V) containing an aminonitrile (I) or a diamine (II) or a dinitrile (III) or mixtures thereof as well as said mine (IV) by a) reacting said mi... | 06/10/2008 |
| 7193102 | Process for the racemate resolution of 3-aminopentanenitrile By means of a new process for the resolution of racemic 3-aminopentanenitrile, enantiomerically enriched 3-aminopentanenitrile or its salts can be obtained. For this, racemic 3-aminopentanenitrile is reacted with an enantiomerically enriched organic acid and one of ... | 03/20/2007 |
| 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 |
| 7026345 | Resolution of 3-amino alkylnitriles The present invention relates to chiral N-acetyl-alpha-amino acid salts of optically active β-amino alkylnitriles, and also to a process for preparing optically active β-amino alkylnitriles by resolving racemic β-amino alkylnitriles using chiral N-acetyl-alpha-am... | 04/11/2006 |
| 7005534 | Method for producing hydrolysis-stable ammonium nitriles The invention relates to a method for producing hydrolysis-stable ammonium nitriles by reacting a compound of formula (1), wherein R1, R2, and R3 are identical or different and represent linear or branched C1–C24 | 02/28/2006 |
| 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 |
| 6906216 | Process for the synthesis of N-Substituted β-amino nitriles through the ring opening of aziridines The present invention comprises the simultaneous ring opening and concomitant N-substitution of various N-tosyl aziridines with different aliphatic and aromatic nitriles in presence of catalytic amount of metal triflates to afford different N-substituted β-amino ni... | 06/14/2005 |
| 6828457 | Method for reducing the content of an unsaturated amine in a mixture containing an amine and a nitrile A process is provided for reducing the content of a monounsaturated aliphatic amine (III) in a mixture (IV) containing an aminonitrile (I) or a diamine (II), or mixtures thereof, and the amine (III), wherein a) the mixture (IV) is ... | 12/07/2004 |
| 6743564 | Amine compounds, resist compositions and patterning process Amine compounds having a cyano group are useful in resist compositions for preventing a resist film from thinning and also for enhancing the resolution and focus margin of resist. ... | 06/01/2004 |
| 6582485 | Fuel and lubricant additives Compounds of the general formula I Z--CH2 --NY2-n Hn (I) where n is 0 or 1, Z is a straight-chain or branched polyalkyl radical having a number average molecular weight of from about 150 to 40,000, and Y is a radical of the formula... | 06/24/2003 |
| 6559333 | Method for purifying aliphatic aminonitriles The present invention relates to a process for the purification of aliphatic aminonitriles and more particularly of 6-aminocapronitrile. It consists more specifically in subjecting 6-aminocapronitrile to a hydrogenation with molecular hydrogen in the presence ... | 05/06/2003 |
| 6521779 | Hemihydrogenation method for dinitriles The invention concerns the hydrogenation in amine function of a nitrile function of a dinitrile to obtain the corresponding aminonitrile. More precisely, the invention concerns the hemihydrogenation of a dinitrile into the corresponding aminonitrile, in a... | 02/18/2003 |
| 6380429 | Preparation of sulfonyl imine compounds Disclosed is a process for the oxidation of sulfonamides to sulfonyl imines using chromium (IV) dioxide as the oxidant.... | 04/30/2002 |
| 6297394 | Iron-based catalyst for hydrogenating alpha-, omega-dinitriles A material useful as catalyst for the hydrogenation of alpha, Omega-dinitriles comprises a) iron or a compound based on iron or mixtures thereof, (b) from 0.001 to 0.3% by weight based on (a) of a promoter based on 2, 3, 4 or 5 elements selected from the group... | 10/02/2001 |
| 6222059 | Process for the manufacture of aliphatic alpha, omega amino nitriles A process for preparing aliphatic alpha,omega-amino nitrites by partial hydrogenation of aliphatic alpha,omega-dinitriles in the presence of a catalyst, wherein the catalyst used for the partial hydrogenation comprises (a) iron or a compound based on iron... | 04/24/2001 |
| 6204408 | Method for separating 6-aminocapronitrile from mixtures containing 6-aminocapronitrile and an imine A process for distillative removal of 6-aminocapronitrile from mixtures (I) comprising 6-aminocapronitrile and an imine (II) comprises conducting the distillation in the presence of carbon dioxide.... | 03/20/2001 |
| 6169199 | Method for separating 6-aminocaproic acid nitrile from mixtures containing 6-aminocaproic acid nitrile and an imine A process for distillative removal of 6-aminocapronitrile from mixtures (I) comprising 6-aminocapronitrile and an imine (II) comprises performing the distillation in a distillation column using an average mean residence time for the distillation mixture o... | 01/02/2001 |
| 6165237 | Fuel and lubricant additives Compounds of the general formula I Z--CH2 --NY2-n Hn (I) where n is 0 or 1, z is a straight-chain or branched polyalkyl radical having a number average molecular weight of from about 150 to 40,000, and Y is... | 12/26/2000 |
| 6156694 | Raney cobalt catalyst and a process for hydrogenating organic compounds using said catalyst The present invention relates to a Raney catalyst comprising iron, cobalt, a third metal wherein the third metal is selected from the group consisting of nickel, rhodium, ruthenium, palladium, platinum, osmium, iridium and mixtures of any of the metals of... | 12/05/2000 |
| 6121481 | Process for preparing 6-aminocapronitrile The invention concerns a process for the preparation of 6-aminocapronitrile or 6-aminocapronitrile-hexamethylene diamine mixtures by: a) reacting 5-formylvaleronitrile with ammonia and hydrogen in the presence of hydrogenation catalysts selected from the ... | 09/19/2000 |
| 6114567 | Preparation of aliphatic alpha, omega-aminonitriles Aliphatic alpha,omega-aminonitriles are prepared by partial hydrogenation of aliphatic alpha,omega-dinitriles at elevated temperatures and superatmospheric pressure in the presence of a solvent and of a catalyst by a process which comprises using a cataly... | 09/05/2000 |
| 6087296 | Raney iron catalyst and a process for hydrogenating organic compounds using said catalyst The present invention relates to a Raney catalyst comprising iron, cobalt, a third metal wherein the third metal is selected from the group consisting of nickel, rhodium, ruthenium, palladium, platinum, osmium, iridium and mixtures of any of these metals.... | 07/11/2000 |
| 6080883 | Method of simultaneously producing 6-aminocapronitrile and hexamethylenediamine A process for the coproduction of 6-aminocapronitrile (ACN) and hexamethylenediamine (HMD) by treatment of adiponitrile (ADN) with hydrogen in the presence of a nickel-containing catalyst at temperatures not below room temperature and elevated hydrogen pa... | 06/27/2000 |
| 6077877 | Reactive amine catalysts for use in polyurethane polymers The present invention provides amine/amide catalysts for use in catalyzing the formation of polyurethane. The amine/amide catalysts, which have low fugitivity due to their reactivity with isocyanates, and good catalytic activity, have the structure #... | 06/20/2000 |
| 6048997 | Manufacturing process for 6-aminocapronitrile Manufacture of 6-aminocapronitrile or 6-aminocapronitrile/hexamethylene diamine mixtures, involving a) the reaction of at least one pentennitrile, selected from the group consisting of 2,3 and 4-pentennitrile with carbon monoxide and hydrogen in the prese... | 04/11/2000 |
| 5986126 | Process for the production of 6-aminocapronitrile and/or hexamethylenediamine Process for producing 6-aminocapronitrile and/or hexamethylenediamine by hydroformylating 3-pentenenitrile, isolating a formylvaleronitrile (FVN) mixture from the hydroformylation reaction product, reductively aminating the FVN mixture and isolating the d... | 11/16/1999 |
| 5961788 | Sequential distillation process for removing tetrahydroazepine from aminocapronitrile and/or hexamethylenediamine A process for removing tetrahydroazepine from aminocapronitrile or hexamethylenediamine by sequential distillation in which the overhead from the second distillation is combined with a fresh, incoming mixture of tetrahydroazepine and aminocapronitrile or ... | 10/05/1999 |
| 5902883 | Cyanobutylation of ammonia, alkylamines and hydrazine with 3-pentenenitrile, 4-pentenenitrile or mixtures thereof The present invention relates to a process for the cyanobutylation of ammonia, an alkylamine or hydrazine with 3- and 4-pentenenitrile and mixtures thereof to form alkylaminonitriles.... | 05/11/1999 |
| 5801268 | Preparation of aliphatic alpha omega-aminonitriles Aliphatic alpha,omega-aminonitriles are prepared by partial hydrogenation of aliphatic alpha,omega-dinitriles at elevated temperatures and superatmospheric pressure in the presence of a solvent and of a catalyst by a process which comprises using a cataly... | 09/01/1998 |
| 5801267 | Preparation of aliphatic alpha, omega-aminonitriles Aliphatic alpha,omega-aminonitriles are prepared by partial hydrogenation of aliphatic alpha,omega-dinitriles at elevated temperatures and superatmospheric pressure in the presence of a solvent and of a catalyst by a process in which the catalyst (a) cont... | 09/01/1998 |
| 5756808 | Preparation of aliphatic, alpha omega-aminonitriles Aliphatic alpha,omega-aminonitriles are prepared by partial hydrogenation of aliphatic alpha,omega-dinitriles at elevated temperatures and superatmospheric pressure in the presence of a solvent and of a catalyst by a process in which the catalyst (a) cont... | 05/26/1998 |
| 5739374 | Processes of preparing diphenylheteroalkyl derivatives Diphenylheteroalkyl derivatives of the formula I ##STR1## where A and R1 -R6 have the meanings specified in the description, and the preparation thereof are described. The substances are suitable for controlling diseases and as cosme... | 04/14/1998 |
| 5668277 | Depolymerization of polyamides One or more polyamides can be depolymerized in the presence of at least one nitrogen-containing compound. The depolymerization takes place at a pressure between about 0.5 and about 5 atm. The polyamide may be in the form of carpet waste or other heterogen... | 09/16/1997 |
| 5646327 | Method for preparing hydroxylamines using vinylic compounds without base neutralization and reaction mixture produced thereby Substituted hydroxylamines useful in photographic processing solution can be prepared by reacting a hydroxylamine with a vinylic compound having an electron withdrawing substituent in a suitable solvent, in the absence of a neutralizing base. The resultin... | 07/08/1997 |
| 5631405 | Method of forming amino acid-derived diaminopropanols useful as chemical intermediates for protease-inhibitors The present invention relates to a method of forming a 1,3-diamino-3-substituted-2-propanol chemical intermediate from which various chemicals, such as selected protease-inhibitors and other drugs, as well as polymers, can be synthesized. This method incl... | 05/20/1997 |
| 5618966 | Method forming protease inhibitor synthetic intermediates The present invention relates to a method of forming a 1,3-diamino-3-substituted-2-propanol chemical intermediate from which various chemicals, such as selected protease-inhibitors and other drugs, as well as polymers, can be synthesized. This method incl... | 04/08/1997 |
| 5599994 | Amino acid-derived diaminopropanols The present invention relates to a method of forming a 1,3-diamino-3-substituted-2-propanol chemical intermediate from which various chemicals, such as selected protease-inhibitors and other drugs, as well as polymers, can be synthesized. The method inclu... | 02/04/1997 |
