Nippon Shokubai Co., Ltd.

Nobuji Kishimoto

Etsushige Matsunami

Isao Nakamura

Taizou Matsueda

Yoshitaka Arita

Akiyoshi Nakajima

Akira Kurusu

Masashi Hashimoto

Yusei Nagamura

Hiroshi Yamamoto

Kunika Takahashi

Lower alkenes of from 2 to 5 carbon atoms, such as propene, are produced by the vapor phase catalytic oxidative dehydrogenation of lower alkane, such as propane, using a mixed metal oxide catalyst of formula (1) as decribed, containing manganese and at least one additional metal as essential elements, e.g., Mn Sb O , Mn P O , Mn S W Cr O . The lower alkene may be further oxidatively dehydrogenated using a mixed metal oxide catalyst of formula (1), especially formula (2), as described, to produce a mixture of unsaturated aldehyde and unsaturated acid. The unsaturated aldehyde may be further oxidatively dehydrogenated in the vapor phase in the presence of mixed metal oxide catalyst of formula (1), especially formula (3).

Lower alkane oxidative dehydrogenation catalysts and a process for producing olefins

Novel oxidative dehydrogenation catalysts which are useful in vapor-phase oxidative dehydrogenation of lower alkanes with molecular oxygen to produce corresponding olefins at high yields are provided. The catalysts are characterized by containing Mn as the essential component and a crystal phase which is identified by the peaks appearing on their X-ray diffraction spectra (per Cu&mdash;K&agr; cathode) where the diffraction angle 2&thgr; (&plusmn;0.3&deg;) is at 32.9&deg;, 55.2&deg;, 23.1&deg;, 38.2&deg; and 65.8&deg;. The use of those catalysts enables production of the olefins at high yields.

Catalysts for oxidative dehydrogenation of alkanes and a process for producing olefins

Method of catalyzing a gas phase reaction using an acid-base catalyst composed of vanadium pentoxide hydrate

Catalyst for oxidizing methylbenzenes and method for producing aromatic aldehyde

Vanadium-containing catalysts are obtained by using polyvanadic acid as a source of vanadium. Vanadium-containing catalysts are obtained by mixing catalyst components other than vanadium, or their precursors, with a polyvanadic acid sol which is formed by ion-exchanging a metavanadic acid aqueous solution with a proton-type cation-exchange resin and performing polycondensation, and by drying and/or calcining the mixture. Such vanadium-containing catalysts can fully exhibit their catalytic activity under mild reaction conditions, and can be suitably used for various reactions, such as synthesis of phthalic anhydride by the partial oxidation of o-xylene, synthesis of benzaldehyde by the partial oxidation of toluene, synthesis of benzoic acid by the partial oxidation of toluene, synthesis of anisaldehyde by the partial oxidation of p-methoxy toluene, synthesis of propylene by the oxidative dehydrogenation of propane, synthesis of isobutene by the oxidative dehydrogenation of isobutane, synthesis of methyl formate by the oxidative dehydrogenation of methanol, and synthesis of acrylonitrile by the ammoxidation of propane.

Vanadium-containing catalysts, process for manufacturing and use of the same

Process for making (meth)acrylonitriles

Vanadium-containing catalysts, process for manufacturing and use of the

Method for the preparation of (meth)acrylonitriles

A catalyst for the production of a substituted benzaldehyde by catalytic vapor-phase oxidation of a substituted toluene, which catalyst has as a catalytically active substance being composed of an oxide represented by the general formula III:

Catalyst for production of substituted benzaldehyde and method for

The present invention provides a process for producing a superconducting material capable of elevating the Tc of oxide superconductors, in particular Bi-based superconductors. The feature of the present invention resides in a process for producing an oxide superconductor, in which a intermediate product or a product showing superconducting property is treated with a solution containing a compound having a reducing or oxidizing function. As the compound having a reducing function, compounds having two or more enolic hydroxy groups, cycloaliphatic polyhydric alcohol compounds or inorganic type reducing compounds are preferred. As the compound having oxidizing function, there can be mentioned, for example, carbonyl compounds, ozone, hydrogen peroxide, organic peroxide, dimethylsulfoxide and permanganate.

Method for increasing Tc of oxide superconductors

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Himeji, Japan

Nobuji Kishimoto