摘要:
A process for preparing amines or imines which comprises contacting an alcohol, aldehyde, or ketone with an aminating agent in the presence of a catalyst under reaction conditions sufficient to form an amine or imine, wherein the catalyst comprises a homogeneous mixture of (a) 10-90 mole percent cobalt or an insoluble salt thereof, (b) 9-89 mole percent copper or an insoluble salt thereof, and (c) 1-20 mole percent of a metal or insoluble salt of a metal selected from the group consisting of a Lanthanum series metal, thorium, uranium, scandium, titanium, and yttrium is described. A process which employs zirconium as component (c) and which is supported on a carrier material, wherein the carrier material has been neutralized with a base, is also disclosed.
摘要:
Metals and alloys of metals which have the property of electrolytic rectification can be coated with an anticorrosive coating by immersion in a strongly alkaline aqueous bath comprising a water soluble fluoride, a water soluble iron salt, and mixtures thereof by the application of a sufficiently high voltage to obtain spark discharge at the surface to be coated, said potential being applied between the metal or alloy to be coated utilized as an anode and a cathode immersed in the aqueous bath. A durable coating is thereby applied to the surface of said metals or alloys thereof which is resistant to a corrosive salt spray environment.
摘要:
Copper, copper oxide, copper-chromium oxide, copper-molybdenum oxide or mixtures thereof have been found to be excellent heterogeneous catalysts for the conversion of nitriles in the presence of water to the corresponding amides. Using one such catalyst in a continuous flow reactor, acrylonitrile was almost 100% converted to acrylamide during more than six weeks of continuous operation.
摘要:
A method of producing amines, the method comprising contacting at reactive conditions at least one alcohol, aldehyde or ketone, or a mixture thereof, with an aminating agent in the presence of a catalyst, is improved by employing as the catalyst a composition comprising cobalt, copper and a third component selected from the group consisting of iron, zinc, zirconium and mixtures thereof. For example, polypropylene glycol is quantitatively aminated by contacting it with ammonia at about 175.degree. C. and in the presence of a catalyst comprising (metal basis) 30 mole percent cobalt, 63 mole percent copper and about 7 mole percent iron.
摘要:
Cupreous catalysts containing (a) copper prepared by reducing copper oxide, (b) reduced copper oxide, or (c) copper oxide have been found to be excellent heterogeneous catalysts for the conversion of nitriles in the presence of water to the corresponding amides. High conversions and yields are obtained with little or no deleterious by-products.
摘要:
A method for producing amines, the method comprising contacting at reactive conditions at least one alcohol, aldehyde or ketone, or a mixture thereof, with an aminating agent in the presence of a cobalt/copper catalyst, is improved by employing as the catalyst a composition comprising cobalt and copper, the catalyst being prepared by the molten salt impregnation technique.
摘要:
Aliphatic nitriles are converted to the corresponding amides by contacting the nitrile in the presence of water with a cupreous catalyst containing copper metal.
摘要:
.[.Aliphatic nitriles.]. .Iadd.Olefinic nitriles of three to six carbon atoms .Iaddend.are converted to the corresponding amides by contacting the nitrile in the presence of water with a cupreous catalyst containing copper prepared by reducing copper hydroxide or a copper salt.
摘要:
A method of producing amines, the method comprising contacting at reactive conditions at least one alcohol, aldehyde or ketone or a mixture thereof with an aminating agent in the presence of a catalyst, is improved by employing as the catalyst a composition comprising nickel, copper and a third component selected from the group consisting of iron, zinc, zirconium and mixtures thereof. For example, polypropylene glycol is quantitatively aminated by contacting it with ammonia at about 175.degree. C. and in the presence of a catalyst comprising (metal basis) 30 mole percent nickel, 63 mole percent copper and about 7 mole percent iron.
摘要:
Imines and secondary amines comprising a backbone portion containing a plurality of polyalkyleneoxy moieties and one or more internal urea, thiourea, biuret, thiobiuret, amide, or thioamide moieties, and a plurality of imino or secondary amino end groups, wherein each imino or secondary amino end group is separated from a urea, thiourea, biuret, dithiobiuret, amide, or thioamide moiety by at least one alkylene, cycloalkylene, aralkylene, arylene, alkyleneoxy, or ppolyalkyleneoxy moiety are disclosed. Prepolymers and polymers prepared from the imines and secondary amines are also disclosed. In addition, the imines and secondary amines of the invention are also useful as epoxy resin curing agents.