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| Number | Title | Issue Date |
| 7235173 | Hydrotreating catalyst that contains a nitrogen-containing organic compound and its use A hydrotreating catalyst that contains at least one element of group VIB and/or group VIII of the periodic table and optionally phosphorus and/or silicon, with an organic compound as an additive that contains at least one nitrogen atom, is used for the transformatio... | 06/26/2007 |
| 7227036 | Production process of aminomethyl group-containing benzamide compound There is provided a process for producing an aminomethyl group-containing benzamide compound represented by the general formula (II): wherein —CONH2 and —X represent a substituent on the benzene ring and —CONH2 exists at the meta- or para-position of —CH2NH2... | 06/05/2007 |
| 7002041 | Stabilized amide composition An amide composition containing an unsaturated amide, a sulfur-containing compound, and a weak acid salt. The composition can include an amide in crystalline form or the composition can be in form of aqueous solution. The composition can exhibit improved stability w... | 02/21/2006 |
| 6998366 | Thin layer catalysts based on Raney alloys, and method for the production thereof Raney alloy catalysts applied to a support are described, said catalysts having an extremely thin layer of Raney alloy with a thickness of 0.01 to 100 μm. These catalysts are prepared by vapor deposition of the appropriate metals under reduced pressure. They are ge... | 02/14/2006 |
| 6916457 | Preparation and use of non-chrome catalysts for Cu/Cr catalyst applications A non-chrome, copper-containing catalyst, Cu—Al—O and method of preparing the same are provided wherein the Cu—Al—O catalyst is prepared by the co-precipitation of copper nitrate (Cu(NO3)2) and sodium aluminate (Na2Al2 | 07/12/2005 |
| 6472561 | Stable highly active supported copper based catalysts Stable highly active supported copper based catalysts of copper oxide or elemental copper crystallites supported on mechanically stable aluminum oxide are disclosed. These catalysts are characterized by high surface area, small copper crystallite size, an... | 10/29/2002 |
| 6100427 | Production of amides and/or acids from nitriles A process for producing an amide and/or acid from a nitrile comprises introducing a nitrile, as a first reactant, and a hydration compound, as a second reactant which is capable of reacting with the nitrile to convert it to its corresponding amide thus hy... | 08/08/2000 |
| 5922912 | Concentration method of aqueous acrylamide solution A method is disclosed for the concentration of an aqueous acrylamide solution prepared by hydration of acrylonitrile or an aqueous acrylamide solution substantially free of acrylonitrile. The method makes use of a concentration apparatus at least a part o... | 07/13/1999 |
| 5866611 | Therapeutic amines Compounds of formula I, and their pharmaceutically acceptable salts, ##STR1## in which R1 and R2 are hydrogen, alkyl, cycloalkyl, cycloalkylalkyl, phenylalkyl or alkenyl; or NR1 R2 is a heterocyclic group; ... | 02/02/1999 |
| 5817872 | Copper catalyst for the hydration of nitrile and preparation thereof A copper catalyst obtained by reducing a precursor containing copper and aluminum and not containing substantially malachite and aluminum hydroxide permits preparation of amides with a high productivity and in a high selectivity by the hydration of nitrit... | 10/06/1998 |
| 5534655 | Process for preparing acrylamide A process for preparing acrylamide is disclosed herein which comprises subjecting acrylonitrile to a hydration reaction in the presence of a copper-based catalyst, said process comprising the step of allowing a compound having an active methylene group an... | 07/09/1996 |
| 5476883 | Preparation process of acrylamide from purified acrylonitrile This invention provides a process for the preparation of acrylamide. Acrylonitrile is treated through at least two purification steps in which acrylonitrile is brought into contact with a strongly-acidic cation exchange resin and then with a resin having ... | 12/19/1995 |
| 5463123 | Process for producing -hydroxyisobutyramide There is disclosed a process for producing -hydroxyisobutyramide by hydration reaction of acetone cyanohydrin in the presence of a catalyst consisting essentially of manganese dioxide which process comprises pretreating the catalyst with a reducing... | 10/31/1995 |
| 5103055 | Water-promoted synthesis of amides from nitriles and alcohols Disclosed is a method which comprises the reaction in a reaction zone of a nitrile, RCN, with a hydroxyl compound, R'OH, in the presence of water introduced into the reaction zone in the amount of more than 0.15 mole and up to 10 moles, per mole of RCN in... | 04/07/1992 |
| 5041656 | Preparation process of (meth)acrylamide A catalyst useful in the practice of a process, in which (meth)acrylamide is prepared through the hydration reaction between (meth)acrylonitrile and water in a suspended liquid-phase bed of a Raney copper catalyst, has been obtained by leaching a Raney co... | 08/20/1991 |
| 5015766 | Preparation process of acrylamide A molten Raney copper alloy containing copper and a metal selected from Al, Si and Zn as major components and, if necessary, specific metals as minor components is solidified at a cooling rate of not less than 1×102 K/sec by a rotary water ato... | 05/14/1991 |
| 4959502 | Catalysts and their use in the hydrolysis of nitriles When making an amide by hydrolysis of a nitrile in an aqueous medium containing a Raney copper or other black copper catalyst, the hydrolysis reaction can be improved if the catalyst has been contacted with an aqueous solution of a water soluble vanadium ... | 09/25/1990 |
| 4906776 | Catalysts and their use in the hydrolysis of nitriles When making an a amide by hydrolysis of a nitrile in an aqueous medium containing a Raney copper catalyst, the yield of amide can be increased and the yield of impurities can be decreased by including vanadium metal in the catalyst. The vanadium may be pr... | 03/06/1990 |
| 4820872 | Process for hydrolyzing nitriles When making an unsaturated amide by hydrolysis of an unsaturated nitrile in the presence of a catalyst such as Raney copper and an oxidizing agent such as copper nitrate, by-product formation is reduced by including a reagent selected from reducing agents... | 04/11/1989 |
| 4801748 | Catalytic process for preparing amide from nitrile, amine and water Amide compounds are efficiently prepared directly from nitriles, amines and water, using a reaction catalyst. The invention also can applied to the manufacture of polyamides, thereby realizing a simplified and rationalized process for polyamide synthesis.... | 01/31/1989 |
| 4701558 | Method for purifying aqueous acrylamide solution A method for purifying an aqueous acrylamide solution by using activated carbon is disclosed. The method comprises contacting activated carbon with water having oxygen dissolved therein until the dissolved oxygen concentration in water after the contact i... | 10/20/1987 |
| 4686302 | Simultaneous preparation of nitriles and acrylamide or methacrylamide Nitriles of the general formula I where R1 is a saturated or unsaturated, straight-chain, branched or cyclic alkyl radical, an aralkyl radical or an aryl radical, each of which is of not more than 20 carbon atoms and can be unsubstituted or further ... | 08/11/1987 |
| 4593123 | Process for the production of acrylamide and methacrylamide Process for the production of acrylamide or methacrylamide wherein acrylonitrile or methacrylonitrile is reacted with water and/or a water donor in the presence of Raney copper catalyst, which is protected from contact with oxygen.... | 06/03/1986 |
| 4543423 | Hydration of nitriles A nitrile, such as acrylonitrile, is hydrated to the corresponding amide in the presence of a Raney copper catalyst that, before use in the reaction, is partially oxidized by contact with a controlled oxidizing system comprising oxygen, peroxide, iodate, ... | 09/24/1985 |
| 4521620 | Acrylamide synthesis from an oil-in-water emulsion containing acrylonitrile A method of producing acrylamide from acrylonitrile in the presence of a metallic conversion catalyst which comprises contacting an oil-in-water emulsion of acrylonitrile, said water phase being the continuous phase and containing up to 7% acrylonitrile a... | 06/04/1985 |
| 4365091 | Method for the production of acrylamide A method for the production of acrylamide by a catalytic hydration of acrylonitrile characterized by using a compound oxide catalyst which is prepared by a precipitation process and represented by the formula, wherein Ti is titanium, X is one of zinc, cadmium ... | 12/21/1982 |
| 4365090 | Process for production of acrylamide In a process for producing acrylamide by hydrating acrylonitrile in the presence of a copper-based catalyst, the reaction is carried out in the presence of 30 to 10,000 ppm of acetone in the reaction solution. According to this process, the activity of th... | 12/21/1982 |
| 4363752 | Catalyst of activated copper-zinc alloy and its use in hydrating acrylonitrile A particulate alloy of 30% copper and 70% zinc is activated with alkali metal hydroxide to produce a catalyst which is useful for the catalytic hydrolysis of acrylonitrile to acrylamide under liquid phase conditions.... | 12/14/1982 |
| 4302597 | Method for the hydration of acrylonitrile to acrylamide In the reaction of conversion of nitriles to amides, more particularly, but not exclusively, acrylonitrile to acrylamide, the improvement consisting in the adoption, as a catalyst, of a copper-based catalyst which is prepared by reacting an organic copper... | 11/24/1981 |
| 4188339 | Process for preparing acrylamide aqueous solution A process for preparing an aqueous solution of acrylamide, which comprises catalytically hydrating acrylonitrile in the presence of a metal-containing catalyst to form a mixed aqueous solution containing about 15 to about 35% by weight of acrylamide and about ... | 02/12/1980 |
| 4178310 | Catalyst for hydration of nitriles Solid catalyst of reduced copper magnesium silicate type is improved for its use in catalytic hydration of acrylonitrile to make acrylamide by calcining the catalyst prior to such use. Calcining strengthens the catalyst particles for longer catalyst life ... | 12/11/1979 |
| 4177210 | Hydration of acrylonitrile to acrylamide An improved process for the hydration of acrylonitrile to acrylamide where nitrile and water are contacted with a heterogeneous hydration catalyst and the process is improved by utilizing as feed acrylonitrile and water which are substantially free of oxa... | 12/04/1979 |
| 4176137 | Manufacture of carboxylic acid amides A process for the manufacture of carboxylic acid amides by addition reaction of water with nitriles in the presence of a catalyst which contains copper and magnesium silicate and has been treated with a reducing gas, to which catalyst cement of a certain ... | 11/27/1979 |
| 4169107 | Process for manufacturing an amide compound using aluminum nitrate promoter An improved process for converting acrylonitrile to the corresponding amide by hydrating said nitrile in the presence of a metallic copper catalyst and aluminum nitrate as promoter for said catalyst.... | 09/25/1979 |
| 4108893 | Purification of an aqueous solution of acrylamide An improved process is disclosed for the purification of an aqueous solution of acrylamide. It comprises bringing a crude aqueous solution of acrylamide into contact with oxygen or an oxygen-containing gas and thereafter subjecting the solution to a dual ... | 08/22/1978 |
| 4096184 | Process for preparing acid amides A process for preparing acid amides by hydration of the corresponding nitrile compounds with water in the presence of a catalyst, characterized in that the catalyst is the one prepared by treating a vanadate with a cuprous salt or with at least two of met... | 06/20/1978 |
| 4086275 | Reduced copper catalyst on support For making supported copper catalyst, useful in hydration of nitriles to produce amides, a cuprous compound e.g. cuprous chloride is impregnated into a support material, e.g. alumina, using acrylonitrile or acetonitrile as the imbibing solvent which is th... | 04/25/1978 |
| 4076747 | Process for hydration of acrylonitrile to produce acrylamide In the catalytic hydration of acrylonitrile to produce acrylamide by contacting aqueous solution of acrylonitrile with a catalyst, the solubility of acrylonitrile in the aqueous feed solution is increased by presence of acrylamide cosolvent in the feed so... | 02/28/1978 |
| 4069255 | Preparation of acrylamide Acrylamide may be prepared by the hydrolysis of acrylonitrile by treating the acrylonitrile with water in the presence of a copper catalyst which has been prepared by volatilizing copper metal at a temperature in the range of from about 1000° to about 15... | 01/17/1978 |
| 4067902 | Mixing two immiscible fluids of differing density Apparatus and method for first mixing continuously at a prechosen flow rate a less dense fluid with a more dense fluid, the fluids being at least partially immiscible, so as to achieve a constant weight ratio of one fluid to the other per prechosen unit o... | 01/10/1978 |
