Abstract:
PROBLEM TO BE SOLVED: To provide a process for the continuous hydrogenation of a nitrile to a primary amine, by which the mild hydrogenation of the nitrile can simply be carried out and especially by which the formation of the primary amine in high selectivity and the avoidance of a secondary treatment such as the separation of the nitrile can be achieved. SOLUTION: In this process for the continuous hydrogenation of the nitrile to the primary amine in a liquid phase over a suspended, activated Raney catalyst based on an alloy of aluminum and at least one transition metal selected from the group consisting of iron, cobalt and nickel, and, if desired, one or more further transition metals selected from the group consisting of titanium, zirconium, chromium and manganese, the hydrogenation is carried out in the absence of ammonia and basic alkali metal compounds or alkaline earth metal compounds.
Abstract:
PROBLEM TO BE SOLVED: To provide an improved catalytic hydrogenation method for an aliphatic unsaturated group of an organic compound. SOLUTION: In the catalytic hydrogenation method for the aliphatic unsaturated group of the organic compound, a catalyst prepared by precipitating a catalytically active component on monoclinic, tetragonal, or cubic zirconium dioxide is used. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a continuous method of producing an unsaturated alcohol by selectively hydrogenating an olefinically unsaturated carbonyl compound, particularly citral is selectively hydrogenated to continuously produce a mixture of geraniol and nerol. SOLUTION: An olefinic unsaturated carbonyl compound is selectively hydrogenated in the reactor including the liquid phase that holds at least one kind of catalyst suspension and may include the gas phase additionally to produce unsaturated alcohols. The reactor used in this process has an opening or a flow channel with the hydraulic diameter of 0.5-20 mm. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To accomplish the hydroamination of an alcohol in high conversion and in high yield and selectivity and with long catalyst life by using a new catalyst. SOLUTION: The subject amine is obtained by reaction of a primary or secondary alcohol and a nitrogen compound selected from ammonia and primary and secondary amines with hydrogen at 80-250 deg.C and 0.1-40 MPa in the presence of a catalyst; wherein the catalyst is such one that, prior to reduction with hydrogen, the catalytically active material thereof comprises (A) 22-40 wt.% of an oxygen-contg. compound of zirconium (in terms of ZrO2), (B)1-30 wt.% of an oxygen-contg. compound of copper (in terms of CuO), (C) 15-50 wt.% of an oxygen-contg. compound of nickel (in terms of NiO), in the molar ratio Ni/Cu of >=1, (D) 15-50 wt.% of an oxygen-contg. compound of cobalt (in terms of CoO), (E) 0-10 wt.% of oxygen-contg. compound(s) of aluminum and/or manganese (in terms of Al2O3 or MnO2), and (F) an oxygen-contg. compound of molybdenum.
Abstract:
PROBLEM TO BE SOLVED: To provide an improved method for producing an amine from an alcohol, an aldehyde, and a ketone by using a catalyst which has improved mechanical properties and economically improves the conventional method using the catalyst containing zirconium dioxide. SOLUTION: The method for producing the amine comprises reacting a primary or secondary alcohol, an aldehyde or a ketone, hydrogen, and a nitrogen compound selected from among ammonia, a primary amine, and a secondary amine in the presence of the catalyst prepared by precipitating a catalytically active component on monoclinic, tetragonal, or cubic zirconium dioxide. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an improved process for the preparation of an iron-doped ruthenium catalyst supported on carbon, and to provide its use for a selective liquid phase hydrogenation of a carbonyl compound to give a corresponding alcohol. SOLUTION: In the process for the preparation of the catalyst comprising iron in addition to ruthenium on the carbon support, the process comprises a stage of simultaneously precipitating the catalytically active components onto the support. The catalyst prepared can be used to obtain geraniol or nerol in good selectivity by in particular the hydrogenation of citral. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing an amine, comprising the reductive amination of the corresponding carbonyl or alcohol containing a considerable amount (at least 50 ppm, especially organically bound) of a halogen, by which the amine can simply be produced at a low cost in reduced catalyst consumption rate and in a high yield. SOLUTION: This method for producing the amine of formula (I): R R CH- NR R (I) (R , R , R and R are each, for example, a 1 to 12C alkyl), comprising the catalytic reductive amination of a mixture of a carbonyl compound of formula (II): R -C(=O)-R and/or an alcohol of formula (III): R -CH(OH)-R with at least 50 ppm (based on the mixture) of a halogen in the presence of a Co- and/or Ni-containing catalyst with a nitrogen compound of formula (IV): HNR R , is characterized in that the reductive animation is carried out in the additive presence of a solid acidic cocatalyst.
Abstract:
PROBLEM TO BE SOLVED: To provide an improved profitable method for racemizing an optically active amine, by which the objective product having a high racemization degree can simultaneously be obtained in a high racemization yield (racemate yield). SOLUTION: This method for racemizing the optically active amine, comprising reacting an optically active amine represented by formula I (R1 and R2 are different from each other; R1, R2, and R3 are each an alkyl, a cycloalkyl, an arylalkyl, an aryl, a heteroaryl or a heterocyclic group; R3 may additionally be H; provided that the above-described groups each may have one or more substituents selected from alkyl groups, cycloalkyl groups, alkoxy groups, aryloxy groups, amino groups, alkylamino groups and dialkylamino groups) in the presence of hydrogen and a hydrogenation catalyst or dehydrogenation catalyst at an enhanced temperature, is characterized in that the catalyst contains copper and zinc oxide as active catalyst components and a carrying material.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a secondary amine in a high yield and selectivity by selecting nitrile using hydrogen in the presence of a catalyst. SOLUTION: In this method for producing a secondary amine represented by general formula (II) (X-CH2-)2NH (II) [X is an alkyl, an alkenyl or a cycloalkyl group] (II), a nitrile represented by general formula (III) X-CN (III) is reacted with hydrogen at 20-250 deg.C under 60-350 bar in the presence of 0.1-5 mass % based on the total amount of Rh and a catalyst on a carrier of a RH-containing catalyst to form a mixture of a primary amine represented by general formula (I) X-CH2-NH2 (I) and the secondary amine represented by general formula (II) (X-CH2-)2NH (II) and at least a part of the primary amine separated from the obtained mixture is returned to the reaction.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a mixture comprising a primary amine and a secondary amine, comprising reacting a nitrile with hydrogen in the presence of a catalyst. SOLUTION: This method for producing the mixture comprising the primary amine of formula (I): X-CH2-NH2 (I) and the secondary amine of formula (II): (X-CH2-)2NH (II) comprises reacting a nitrile of formula (III): X-CN (III) with hydrogen in the presence of a Pd-containing catalyst containing the Pd on a support in an amount of 0.1 to 10 mass % based on the total amount of the catalyst at 50 to 250 deg.C at a pressure of 5 to 350 bar.