Asahi Kasei Chemicals Corporation

Asahi Kasei Kabushiki Kaisha

Hiroyuki Yano

Kenji Akagishi

Ryusuke Miyazaki

Hideo Midorikawa

Takashi Tsunoda

Hidenori Hinago

Takashi Kinoshita

Kazuhiro Takagaki

Haruhiko Watanabe

Miho Naritomi

Hiroyuki Yanagi

A metal oxide catalyst, which has a bulk composition represented by formula (1) below and which is used to produce a conjugated diolefin by an oxidative dehydrogenation reaction between a monoolefin, having 4 or more carbon atoms, and molecular oxygen, wherein standard deviation obtained by dividing a ratio of Bi molar concentration relative to Mo molar concentration at the surface of a catalyst particle by a ratio of the Bi molar concentration relative to the Mo molar concentration in a catalyst bulk is 0.3 or less.MoBiFeABCDEFO&#x2003;&#x2003;(1)(In the formula, A is at least one type of element selected from the group consisting of Ni and Co, B is at least one type of element selected from among alkali metal elements, C is at least one type of element selected from the group consisting of Mg, Ca, Sr, Ba, Zn and Mn, D is at least one type of rare earth element, E is at least one type of element selected from the group consisting of Cr, In and Ga, F is at least one type of element selected from the group consisting of Si, Al, Ti and Zr, O is oxygen, p, q, a, b, c, d, e, f and x denote the number of atoms of Bi, Fe, A, B, C, D, E, F and oxygen, respectively, relative to 12 Mo atoms, and are such that 0.1&#x2264;p&#x2264;5, 0.5&#x2264;q&#x2264;8, 0&#x2264;a&#x2264;10, 0.02&#x2264;b&#x2264;2, 0&#x2264;c&#x2264;5, 0&#x2264;d&#x2264;5, 0&#x2264;e&#x2264;5 and 0&#x2264;f&#x2264;200, and x is the number of oxygen atoms required to satisfy valency requirement of other elements present.)

Metal oxide catalyst, method for producing same, and apparatus for producing same

An object of the present invention is to provide a method for production of a high purity conjugated diolefin. The method for production of a conjugated diolefin of the present invention comprises steps of supplying a source gas containing a C4 or higher monoolefin and an oxygen-containing gas into a reactor, bringing a catalyst into contact with the gas mixture, compressing a gas containing a conjugated diolefin produced by an oxidative dehydrogenation reaction to obtain a liquefied gas and rinsing the liquefied gas with water.

Method for production of conjugated diolefin

The present invention provides a zeolite-containing catalyst having excellent shape, fluidity and mechanical strength as a catalyst for a fluidized bed reaction. The present invention provides a zeolite-containing catalyst which is a particulate catalyst containing zeolite and silica, wherein the catalyst has an average particle diameter of 20 to 300 &#x3bc;m and the ratio of the void area in the cross-section of the particle is 30% or less relative to the cross-section area of the particle.

Zeolite-containing catalyst and method for producing the same, and method for producing propylene

A method for producing a conjugated diolefin that can suppress reaction byproducts with high boiling point from remaining in steps following a quenching step by a quenching tower, and producing a conjugated diolefin (e.g., 1,3-butadiene) that can be used as a raw material for synthetic rubber, resin and the like, even when using an industrial grade mixed hydrocarbon that may not necessarily have a high purity as a raw material to produce the conjugated diolefin (e.g., butadiene). The method includes a step of producing a product gas by reaction containing a conjugated diolefin by feeding a hydrocarbon containing a monoolefin having 4 or more carbon atoms and oxygen to a reactor accommodated with a catalyst containing a metal oxide and a carrier, and a step of sending the product gas by reaction to a quenching tower and washing with a quenching agent (e.g., an organic amine aqueous solution).

Method for producing conjugated diolefin and apparatus for production

The present invention provides a process for producing propylene, comprising contacting at least one of raw material selected from the group consisting of ethylene and ethanol with a catalyst containing a medium pore diameter zeolite in a fluidized bed reactor wherein the catalyst containing the medium pore diameter zeolite satisfies the following (a) through (e):

Propylene production process

There is provided a method for production of a conjugated diene from a monoolefin having four or more carbon atoms by a fluidized bed reaction. The method for production of a conjugated diolefin includes bringing a catalyst in which an oxide is supported on a carrier into contact with a monoolefin having four or more carbon atoms in a fluidized bed reactor in which the catalyst and oxygen are present, wherein the method satisfies the following (1) to (3):

Disclosed is a process for producing an oxide catalyst comprising, as component elements, molybdenum (Mo), vanadium (V), at least one element selected from the group consisting of the two elements of antimony (Sb) and tellurium (Te), and niobium (Nb), wherein the process comprises providing an aqueous raw material mixture containing compounds of the component elements of the oxide catalyst, and drying the aqueous raw material mixture, followed by calcination, and wherein, in the aqueous raw material mixture, at least a part of the niobium compound as one of the compounds of the component elements is present in the form of a complex thereof with a complexing agent comprising a compound having a hydroxyl group bonded to an oxygen atom or a carbon atom. Also disclosed is a process for producing (meth)acrylonitrile or (meth)acrylic acid, which comprises performing the ammoxidation or oxidation of propane or isobutane in the gaseous phase in the presence of the oxide catalyst.

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Tokyo, Japan

Hiroyuki Yano