Nippon Shokubai Co., Ltd.

Etsushige Matsunami

Nobuji Kishimoto

Tsukasa Takahashi

Hiroto Kasuga

Yoshitaka Arita

Hiroyuki Uhara

Yasuhisa Emoto

Akira Kurusu

Isao Nakamura

Masafumi Sugio

Kazuo Anyouji

The present invention provides a process for producing acrylic acid from glycerin with a catalyst having a prolonged life. In the process for producing acrylic acid from glycerin, a molar ratio of oxygen to glycerin in a raw material gas is set to be not lower than 0.8 and not higher than 20.

Process for producing acrylic acid

There is provided a process for producing acrolein from glycerin, exhibiting a suppressed decrease in the yield of acrolein with time. In the process for producing acrolein by dehydrating glycerin in the presence of a catalyst containing a metal phosphate, one, or two or more, metal phosphates are used, which are selected from aluminum salts, zirconium salts, manganese salts, alkali metal salts (provided that the alkali metal is sodium, potassium, or cesium, and the ratio between the mole number (M) of the alkali metal and the mole number (P) of phosphoric acid (i.e., M/P ratio) in the metal phosphate is 2.0 or lower), alkali earth metal salts (provided that the ratio between the mole number (M) of the alkali earth metal and the mole number (P) of phosphoric acid (i.e., M/P ratio) in the metal phosphate is 1.0 or lower), and the like.

Process for production of acrolein

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

Process for producing pyromellitic anhydride

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

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

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

Method for the preparation of (meth)acrylonitriles

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Himeji, Japan

Etsushige Matsunami