Class 564/128 - Of acrylonitriles

Subclass of Class 564 - Organic compounds -- part of the class 532-570 series
Definition: Processes wherein acrylonitriles are catalytically hydrated.
No. of patents: 29
Last issue date: 10/29/2002

Number	Title	Issue Date
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
6133478	Catalyst and process for preparing amides A platinum complex useful as a catalyst for converting nitrites into amides comprises a platinum complex of dialkyl phosphine of stoichiometric formula: PtX(R2 POHOPR2)(PR2 OH) where R is an alkyl, alicyclic, chiral, alkyl...	10/17/2000
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
5811580	Process for the preparation of N-hydrocarbyl-substituted amides via the ritter reaction using solid clay catalysts Hydrocarbyl-substituted amides can be prepared in a catalyzed Ritter reaction by contacting a nitrile with a hydrocarbylating agent, in the presence of an acidified clay as the catalyst, under conditions conducive to the formation of the hydrocarbyl-subst...	09/22/1998
5712413	Process for the preparation of N-hydrocarbyl-substituted amides such as tert-butylacrylamide via the Ritter reaction using solid heteropolyacid catalysts Hydrocarbyl-substituted amides are prepared by a process comprising contacting a nitrile with a hydrocarbylating agent, such as an alkylating agent, in the presence of a catalyst comprising a heteropolyacid or salt thereof....	01/27/1998
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
5387715	Process for producing ଱-hydroxy-isobutyramide Alpha-hydroxy-isobutyramide is produced by continuously hydrating acetone cyanohydrin in a liquid phase in the presence of a manganese dioxide catalyst and in the presence of a particular oxide dissolved in water, oxoacid, heteropolyacid or a salt of the ...	02/07/1995
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
4851576	Process for catalytic hydrolysis of an ଱-amino- nitrile in heterogeneous phase, and polymeric resins having catalytic activity for affecting the process This invention relates to a process for the catalytic hydrolysis of an ଱-aminonitrile in the heterogeneous phase, and to polymeric resins having a catalytic activity for carrying out the present process. The process according to this invention is charact...	07/25/1989
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
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
4684751	Catalytic compositions for preparing amides and primary alcohols A catalytic composition useful for producing amides and primary alcohols from nitriles and alkenes respectively, comprising in the first instance water, a suitable nucleophile, and MHCl[P(R)3 ]2 wherein M is platinum, palladium, or n...	08/04/1987
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
4413143	Method of producing acrylamide from water-in-oil emulsion of acrylonitrile A method of producing acrylamide from acrylonitrile in the presence of a metallic conversion catalyst which comprises contacting a water-in-oil emulsion of acrylonitrile which is contained in the dispersed aqueous phase of the emulsion under conditions wh...	11/01/1983
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
4329500	Catalysts for the hydration of nitriles to amides A process for hydrating a nitrile to the corresponding amide by contacting the nitrile in the presence of water with an essentially insoluble heterogeneous catalyst selected from the group consisting of unreduced and reduced cobalt oxide and unreduced and...	05/11/1982
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
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
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
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
4036879	Catalysts for the hydration of nitriles of amides A process for hydrating a nitrile to the corresponding amide by contacting the nitrile in the presence of water with an essentially insoluble heterogeneous catalyst selected from the group consisting of reduced silver oxide, reduced nickel-chromium oxide,...	07/19/1977
3997606	Method of producing dry acrylamide Dry acrylamide is produced by reacting acrylonitrile with from 0.3 to 1 mole of water in the presence of a metallic nitrile conversion catalyst. The reaction is conducted under conditions of pressure and temperature and other reaction conditions to conver...	12/14/1976
3980661	Hydrolysis of nitriles Nitriles, such as acrylonitrile, are converted to the corresponding amides by a catalytic liquid phase hydrolysis employing as the homogeneous catalyst, the reaction product of a rhodium compound and a thiophosphite....	09/14/1976

PatentStorm

Bizarre Patents

PatentStorm News

Class 564/128 - Of acrylonitriles