Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1997-01-29
1999-03-02
Owens, Amelia
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
562412, 568432, 502202, C07D30777
Patent
active
058773304
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to vanadium-containing catalysts used for various types of catalytic reactions, for example, oxidation reactions. More specifically, the present invention relates to catalysts containing vanadium as a principal component, suitable for use in various reactions including oxidation reactions of aromatic hydrocarbon, heterocyclic compound, saturated aliphatic hydrocarbon, unsaturated aliphatic hydrocarbon, and derivatives thereof, for example, various partial oxidation reactions, such as synthesis of phthalic anhydride from o-xylene or naphthalene, synthesis of pyromellitic dianhydride from durene, synthesis of maleic anhydride from benzene or n-butane, synthesis of (substituted) benzaldehyde from (substituted) toluene, synthesis of benzoic acid from toluene, synthesis of pyridine carboxylic acids by the oxidation of picoline, lutidine, quinoline, etc., synthesis of formaldehyde from methane, and synthesis of (meth)acrylic acid from (meth)acrolein; various oxidative dehydrogenation reactions, such as synthesis of propylene and butenes by the oxidative dehydrogenation of propane and butanes, and synthesis of formaldehyde and methyl formate from methanol; various ammoxydation reactions, such as synthesis of benzonitrile by the ammoxydation of toluene, synthesis of acrylonitrile and methacrylonitrile by the ammoxydation of propane and isobutane; oxidation reactions of inorganic compounds, such as synthesis of sulfuric acid by the oxidation of SO.sub.2 ; reductive denitration of nitrogen oxide by means of ammonia; decomposition reactions of organic halides; hydrogenation reactions; dehydrogenation reactions; hydrodesulfurization reactions; isomerization reactions; alkylation reactions; dehydration reactions; polymerization reactions: and photocatalytic reactions. The present invention also relates to a process for manufacturing such catalysts. Furthermore, the present invention relates to processes for manufacturing phthalic anhydride, isobutene, methyl formate, benzaldehyde, benzoic acid, anisaldehyde, propylene and acrylonitrile as the uses of such catalysts.
BACKGROUND ART
Catalysts containing vanadium as a principal component have been studied or industrially used in various reactions, such as synthesis of phthalic anhydride by the oxidation of o-xylene or naphthalene, synthesis of pyromellitic dianhydride by the oxidation of durene, synthesis of maleic anhydride by the oxidation of benzene or n-butane, synthesis of benzonitrile by the ammoxydation of toluene, synthesis of substituted benzaldehyde by the oxidation of substituted toluene, synthesis of acrylic acid by the oxidation of acrolein, synthesis of formaldehyde by the oxidative dehydrogenation of methanol, synthesis of propylene and butenes by the oxidative dehydrogenation of propane and butanes, synthesis of acrylonitrile and methacrylonitrile by the ammoxydation of propane and isobutane, synthesis of sulfuric acid by the oxidation of SO.sub.2, reductive denitration of nitrogen oxide by means of ammonia, and decompositions reaction of organic halides.
In the above-mentioned conventional catalysts, vanadium presents in the form of oxide or composite oxide with other component. Vanadium is often used as a molded catalyst prepared by molding such oxide or composite oxide, or a supported catalyst containing such oxide or composite oxide supported on a carrier. The preparation of such a catalyst has been carried out by using an aqueous solution of water-soluble salt like ammonium metavanadate and vanadyl oxalate, or an aqueous solution obtained by dissolving such a water-soluble salt or vanadium pentoxide in an oxalic acid and a mineral acid such as hydrochloric acid; impregnating a carrier with the solution, or mixing the solution with other component.
However, since the conventional vanadium-containing catalysts are formed by only compulsory deposition of a vanadium component on a carrier or solidifying a vanadium component, for example, by evaporating and drying a solution containing vanadium component, a
REFERENCES:
patent: 4835126 (1989-05-01), Wachs et al.
Lemerel et al., "Condensation Process in Polyvanadic Acid Solutions," J. inorg. nucl. Chem., vol. 42, pp. 17-20, (1980).
Pozarnsky et al., Effects of Aging Time on V.sub.2 O.sub.5 Sol-Gel Coatings, Journal of Sol-Gel Science and Technology, 3, pp. 57-62 (1994).
Eon et al., "Oxidative Dehydrogenation of Propane on .gamma.-Al.sub.2 O.sub.3 Supported Vanadium Oxides", Journal of Catalysis, 145, pp. 318-326, (1994).
Kishimoto Nobuji
Matsunami Etsushige
Nippon Shokubai Co. , Ltd.
Owens Amelia
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