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| Number | Title | Issue Date |
| 8188318 | Method of manufacturing ethyleneamines The present invention provides methods of manufacturing ethyleneamines that makes use of an ethyleneamine-generating process that is coupled to a transamination process. The combination of an ethyleneamine-generating process with a transamination process improves th... | 05/29/2012 |
| 7393978 | Method for producing ethylene-amines Process for the preparation of ethylenamines, in particular diethylenetriamine (DETA), by continuous reaction of ethylenediamine (EDA) in the presence of a heterogeneous catalyst, where the reaction is carried out in a reaction column. ... | 07/01/2008 |
| 7227040 | Process for forming branched composition catalytically by carbon-hydrogen bond activation in a saturated moiety A branched composition can be formed by reacting a reagent containing a saturated hydrocarbon moiety in the presence of (a) a catalyst capable of activating a carbon-hydrogen bond therein and (b) a branching reagent having a moiety that binds to the carbon atom in t... | 06/05/2007 |
| 7084092 | Shale hydration inhibition agent and method of use A water-base fluid for use in drilling, cementing, workover, fracturing and abandonment of subterranean wells through a formation containing a shale which swells in the presence of water. In one illustrative embodiment, the drilling fluid includes, an aqueous based ... | 08/01/2006 |
| 7053247 | Process for the manufacture of diethylenetriamine and higher polyethylenepolyamines The invention relates to a process for the manufacture of diethylenetriamine and higher polyethylenepolyamines by a transamination of ethylenediamine. The transamination is performed at a temperature from 135° C. to 180° C. at a pressure from 5 Mpa to 40 Mpa in th... | 05/30/2006 |
| 7053246 | Preparation of a symmetrical secondary amine Process for preparing a symmetrical secondary amine by reaction of a primary amine in the presence of hydrogen and a catalyst whose preparation has involved precipitation of catalytically active components onto monoclinic, tetragonal or cubic zirconium dioxide. ... | 05/30/2006 |
| 6951959 | Low pressure process for manufacture of 3-dimethylaminopropylamine (DMAPA) An improved process for the production of 3-dimethylaminopropylamine in high purity from N,N-dimethylaminopropionitrile utilizing a low pressure hydrogenation process is described. The basic process comprises contacting the nitrile with hydrogen at low pressure in t... | 10/04/2005 |
| 6576796 | Process for the preparation of alkylamines Preparation of alkylamines, where, in a first process stage, an olefin is reacted with ammonia, a primary amine and/or a secondary amine under hydroaminating conditions, and then, in a second process stage, the resulting hydroamination product(s) is/are r... | 06/10/2003 |
| 6492558 | Preparation of n-butylamines Process for the preparation of n-butylamines where n-butenylamines are firstly prepared by reacting 1,3-butadiene in the form of a 1,3-butadiene containing mixture obtained during the cracking of petroleum fractions or during the dehydrogenation of LPG or... | 12/10/2002 |
| 6248925 | Selective reductive amination of nitriles This invention pertains to an improvement in a process for the formation of secondary or tertiary amines by the catalytic reductive amination of a nitrile with a primary or secondary amine and, particularly to the reductive amination of C8-20 n... | 06/19/2001 |
| 5939588 | Asymmetric fluorine-containing primary amines and their preparation The present invention, which is aimed at providing a novel reaction for converting a fluorine-containing carbonyl compound to an asymmetric fluorine-containing primary amine, relates to a method in which a Schiff base obtained by the condensation of a flu... | 08/17/1999 |
| 5817593 | Catalyst and process for producing amines This invention includes catalysts comprising rhenium (atomic number 75), nickel, cobalt, boron and copper and/or ruthenium impregnated on a support material and a process for preparing said catalyst, said process comprising (i) impregnating a mixture of m... | 10/06/1998 |
| 5801285 | Process for the preparation of 2-methyl-2,4-diaminopentane The present invention relates to a process for preparing 2-methyl-2,4-diaminopentane by introducing acetone, ammonia and hydrogen into a two-zone reactor at a temperature of 20° to 130° C. and a pressure of 30 to 250 bar, wherein the first zone contains... | 09/01/1998 |
| 5773659 | Process for producing dimethylamine To develop a zeolite catalyst which can prevent the drastic lowering of dimethylamine selectivity to be caused in the production of dimethylamine using a zeolite catalyst when the conversion of methanol is high, and which can give higher dimethylamine sel... | 06/30/1998 |
| 5648545 | Preparation of amines from nitriles by alkylation with a nitrogen compound in the presence of a copper oxide/zirconium oxide catalyst Catalysts consisting of from 85 to 100 wt % of copper oxide and zirconium oxide and from 15 to 0 wt % of metal oxides of the subgroups Ib to VIIb and VIII of the Periodic Table and a process for the preparation of amines from nitriles and nitrogen compoun... | 07/15/1997 |
| 5608114 | Disproportionating method of trimethylamine Upon subjecting trimethylamine with ammonia and optionally, a methylamine to a disproportioning reaction to reduce the proportion of the trimethylamine, use of a zeolite as a catalyst, said zeolite being mordenite, clinoptilolite or the like at least 80% ... | 03/04/1997 |
| 5567847 | Disproportionation of amines to produce secondary amines This invention relates to an improvement in a process for the production of amines and particularly secondary amines by the hydrogenation of aliphatic and aromatic nitriles and disproportionation of the resulting primary amine containing feedstock. The im... | 10/22/1996 |
| 5559270 | Method of synthesizing pure additives and the improved compositions thereby produced An improved process of synthesizing gasoline soluble polyolefinic amines or polyether amines comprising the steps of reacting polyolefinic halides or polyether halides with polyamines in a specific sequence of reactions; distilling off non-reactive polyam... | 09/24/1996 |
| 5557011 | Preparation of diamines Process for the preparation of diamines of the general formula I ##STR1## in which A denotes a C1 -C20 alkylene chain optionally mono- to penta-substituted by C1 -C4 alkyl, R1, R2 denote C | 09/17/1996 |
| 5554793 | Catalytic reforming of alkyleneamines A process of reforming an alkyleneamine feedstock or a mixture of such feedstocks to an alkyleneamine or a mixture of alkyleneamines which is different from the feedstock or feedstock mixture. The process is catalyzed by one of the following: Group VB met... | 09/10/1996 |
| 5410086 | Selective preparation of diethylenetriamine This invention relates to a method for controlling the weight ratio of diethylenetriamine to piperazine in a process in which ethylenediamine, or a mixture of ethylenediamine and monoethanolamine, and hydrogen are maintained in the presence of a hydrogena... | 04/25/1995 |
| 5410087 | Catalytic reforming of alkyleneamines A process of reforming an alkyleneamine feedstock or a mixture of such feedstocks to an alkyleneamine or a mixture of alkyleneamines which is different from the feedstock or feedstock mixture. The process is catalyzed by one of the following: Group VB met... | 04/25/1995 |
| 5364971 | Decolorization of polyethylene polyamines using ruthenium The present invention relates to a process for the reduction of the color of polyamines by reacting at elevated temperature, e.g. 120°-170° C., and pressure, e.g. 500 to 6000 psig. the colored polyamines, e.g. triethylenetetramine and tetraethylenepenta... | 11/15/1994 |
| 5362914 | Decolorization of polyethylene polyamines using cobalt/copper/chromium The present invention relates to a process for the reduction of the color of polyamines by reacting at elevated temperature, e.g. 120°-170° C., and pressure, e.g. 500 to 6000 psig. the colored polyamines, e.g. triethylenetetramine and tetraethylenepenta... | 11/08/1994 |
| 5331102 | Method for decolorization of alkanolamines and alkyleneamines Color-containing alkanolamines or alkyleneamines, having color numbers of up to 100 PtCo or higher, can be treated with inorganic solid acidic catalysts. Inorganic support materials having bonded inorganic acid functionalities may be used as the inorganic... | 07/19/1994 |
| 5288909 | Catalytic reforming of alkyleneamines A process of reforming an alkyleneamine feedstock or a mixture of such feedstocks to an alkyleneamine or a mixture of alkyleneamines which is different from the feedstock or feedstock mixture. The process is catalyzed by one of the following: Group VB met... | 02/22/1994 |
| 5256786 | Catalytic reforming of cyclic alkyleneamines A process of reforming cyclic alkyleneamines to amine-extended cyclic alkyleneamines involving contacting a cyclic alkyleneamine or mixture of cyclic alkyleneamines in the liquid phase with a catalyst under reaction conditions. The catalyst is selected fr... | 10/26/1993 |
| 5254737 | Continuous preparation of secondary amines from nitriles using a two-step process A method for producing secondary amines, particularly fatty secondary amines such as ditallowamine from fatty nitriles, such as tallow nitrile over a reduction, hydrogenation catalyst, such as nickel or cobalt, in two steps has been discovered. The reacti... | 10/19/1993 |
| 5243078 | Production of noncyclic polyalkylene polyamines A process for selectively preparing predominantly noncyclic polyalkylene polyamines wherein one or more linear alkyleneamines are reacted in the presence of a mordenite catalyst under conditions sufficient to effect a disproportionation reaction. Preferab... | 09/07/1993 |
| 5231230 | Selective production of diethylenetriamine This invention relates to a process for making amines having a high yield weight percent of diethylenetriamine (DETA) by condensing an amino compound in the presence of a condensation catalyst selected from a Group IVB metal oxide, a metallic phosphate ha... | 07/27/1993 |
| 5225598 | Selective production of linear pentaethylenehexamine and hydroxyethyldiethylenetriamine This invention relates to a process for making amines having a high yield weight percent of linear pentaethylenehexamine (L-PEHA) and hydroxyethyldiethylenetriamine (HEDETA) by condensing an amino compound in the presence of a condensation catalyst select... | 07/06/1993 |
| 5225599 | Selective production of linear triethylenetetramine and aminoethylethanolamine This invention relates to a process for making amines having a high yield weight percent of linear triethylenetetramine (L-TETA) and aminoethylethanolamine (AEEA) by condensing an amino compound in the presence of a condensation catalyst selected from a G... | 07/06/1993 |
| 5225600 | Amines catalysis using group VIB metal-containing condensation catalysts This invention relates to a process for making amines by condensing an amino compound in the presence of a Group VIB metal-containing condensation catalyst. This invention also relates to an alkyleneamines producers composition rich in triethylenetetramin... | 07/06/1993 |
| 5220071 | Selective production of pentaethylenehexamine and hydroxyethyltriethylenetetramine This invention relates to a process for making amines having a high yield weight percent of pentaethylenehexamine (PEHA) and hydroxyethyltriethylenetetramine (HETETA) by condensing an amino compound in the presence of a condensation catalyst selected from... | 06/15/1993 |
| 5214215 | Selective production of aminoethylethanolamine This invention relates to a process for making amines having a high yield weight percent of aminoethylethanolamine (AEEA) by condensing an amino compound in the presence of a condensation catalyst selected from a Group IVB metal oxide, a Group VIB metal-c... | 05/25/1993 |
| 5214213 | Selective production of linear tetraethylenepentamine and hydroxyethyldiethylenetriamine This invention relates to a process for making amines having a high yield weight percent of linear tetraethylenepentamine (L-TEPA) and hydroxyethyldiethylenetriamine (HEDETA) by condensing an amino compound in the presence of a condensation catalyst selec... | 05/25/1993 |
| 5210307 | Catalytic reforming of alkyleneamines to linearly-extended polyalkylenepolyamines A process for reforming alkyleneamines to predominantly linearly-extended polyalkylenepolyamines comprising contacting an alkyleneamine or mixture thereof with a catalyst under conditions such that a mixture of polyalkylenepolyamines enriched in linearly-... | 05/11/1993 |
| 5210306 | Promoted amines catalysis This invention relates to a process for making amines by condensing an amino compound in the presence of a condensation catalyst and a condensation catalyst promoter, wherein said condensation catalyst promoter is present in an amount sufficient to promot... | 05/11/1993 |
| 5166442 | Catalytic reforming of alkyleneamines A process of reforming an alkyleneamine feedstock or a mixture of such feedstocks to an alkyleneamine or a mixture of alkyleneamines which is different from the feedstock or feedstock mixture. The process is catalyzed by one of the following: Group VB met... | 11/24/1992 |
| 5166415 | Selective production of diethylenetriamine and aminoethylethanolamine This invention relates to a process for making amines having a high yield weight percent of diethylenetriamine (DETA) and aminoethylethanolamine (AEEA) by condensing an amino compound in the presence of a condensation catalyst selected from a Group IVB me... | 11/24/1992 |
