Nitto Chemical Industry Co., Ltd.

Nitto Kagaku Kogyo Kabushiki Kaisha

Kiyoshi Moriya

Yutaka Sasaki

Kunio Mori

Yoshimi Nakamura

Hiroshi Utsumi

Tomio Nakamura

Shigeru Saito

Hiroshi Yamamoto

Akimitsu Morii

Koichi Mizutani

Miki Kunitani

Mikio Noda

The present invention provides a fluidized bed catalyst for the synthetic reaction of organic compounds which has a reduced catalyst loss. A fluidized bed catalyst for organic compound synthetic reaction, characterized in that 90% or more of the catalyst particles is in the range of 5-500 .mu.m on the weight-based particle size distribution and 90% or more of the 20-75 .mu.m particles has a crushing strength which satisfies the following equation:

Particulate catalyst for use in a fluidized bed

An iron-antimony-molybdenum-containing oxide catalyst composition for oxidation reactions, comprising a crystalline iron antimonate having a crystallite size of 100 .ANG. or more, said catalyst being represented by the following empirical formula:

Iron-antimony-molybdenum-containing oxide catalyst composition and

A process for producing a molybdenum bismuth-containing metal oxide catalyst comprising: mixing

Process for producing molybdenum bismuth-containing metal oxide catalyst

A process for producing a molybdenum-containing metal oxide fluid-bed catalyst comprising, as essential components,

Process for producing molybdenum-containing metal oxide fluid-bed

A process for the production of acrylonitrile by vapor phase catalytic ammoxidation of propylene in a fluidized bed at high yield with the use of a multicompenent fluidized bed catalyst comprising molybdenum, bismuth, iron, antimony, nickel and alkali metal(s) each carried by silica, which has a high catalytic activity and a high attrition resistance and which does not require any expensive cobalt catalytic component.

Process for the production of acrylonitrile

A process for producing acrylonitrile by the vapor-phase catalytic ammoxidation of propylene using a catalyst whose composition is represented by the empirical formula (I):

Process for producing acrylonitrile

A process for the production of antimony-containing metal oxide catalysts, comprising preparing a slurry containing as essential components an antimony component, a polyvalent metal compound, and silica sol, heating and drying the slurry to form a solid product, and then calcining the solid product, wherein the antimony component is a mixture of (A) at least one of antimonic acid, polyantimonic acid and the salts thereof and (B) antimony trioxide, and is prepared by mixing (A) and (B) in such a manner that the antimony provided by the (B) constitutes from 0.1 to 70 atomic % of the total amount of antimony and further in an aqueous slurry state. These antimony-containing metal oxide catalysts have superior activity and physical properties, and further reproducibility in the preparation thereof. Thus they are useful for production of aldehydes and acids through oxidation, nitriles through ammoxidation, and dienes, unsaturated aldehydes and unsaturated acids through oxidative dehydrogenation.

Process for the production of antimony-containing metal oxide catalysts

A process for regenerating an antimony containing metal oxide catalyst which comprises

Process for regenerating antimony containing oxide catalyst comprising

A process for producing a fluid catalyst having good activity from a coarse catalyst wherein said fluid catalyst is suitable for oxidation, ammoxidation or oxidative dehydrogenation reaction of hydrocarbons which comprises crushing a fluid catalyst, a greater part of which is composed of particles having a large particle size, to produce finely-divided particles, adjusting the distribution of particle size of said catalyst so that the amount of particles of a size of about 20.mu. or less is about 30% by weight or less of the total weight of catalyst particles and the amount of particles having a weight average particle size is 90% or less based on the catalyst prior to crushing, and thereafter calcining said catalyst at a temperature of about 500.degree. C. - about 1000.degree. C. under a non-reducing atmosphere.

Process for producing fluid catalyst having good activity from coarse

A process for producing acrylonitrile by the vapor-phase catalytic ammoxidation of propylene, which comprises (I) reacting propylene, a molecular oxygen-containing gas and ammonia in the presence of a catalyst expressed by the following empirical formula

Process for production of acrylonitrile

A tellurium component is separated from a tellurium-antimony-containing metal oxide catalyst by heating the catalyst at a temperature of about 900.degree. C. to about 1,000.degree. C. in a non-reducing atmosphere.

Separation of tellurium from tellurium-antimony-containing metal oxide

A process for regenerating a deteriorated antimony containing oxide catalyst comprising as essential components of (i) antimony and (ii) at least one metal element selected from the group consisting of iron, cobalt, nickel, manganese, uranium, cerium, tin and copper wherein the deteriorated antimony containing oxide catalyst is impregnated or sprayed with an aqueous hydrogen peroxide solution and the impregnated catalyst is dried and then calcined at a temperature of about 200.degree. to 1,000.degree. C.

Process for regenerating an antimony containing oxide catalyst

A process for preparing acrylonitrile from propylene, which comprises contacting a mixture of propylene, molecular oxygen and ammonia in the vapor phase at a temperature of about 380.degree. to about 500.degree. C. and a pressure of about atmospheric pressure to about 3 Kg/cm.sup.2 -G with a catalyst composition comprising active components of the following empirical formula

Catalyst for use in and process for preparing acrylonitrile

A process for producing a catalyst comprising an antimony-containing oxide which comprises the steps of (A) calcining a mixture of metal oxides containing, as essential components, an oxide of antimony and an oxide of at least one metal selected from the group consisting of iron, cobalt, nickel, manganese, uranium, tin and copper, said calcining being at temperatures of from about 500.degree. C to about 1000.degree. C; (B) impregnating with or spraying onto said calcined mixture of metal oxides (a) an aqueous solution or a suspension containing (1) at least one compound of a metal selected from the group consisting of molybdenum, vanadium and tungsten, said metal compound being thermally convertible to an oxide of said metal, and (2) a tellurium compound, said tellurium compound being thermally convertible to a tellurium oxide, or (b) an aqueous solution or a suspension containing said metal compound (1) and an aqueous solution or a suspension containing said tellurium compound (2); (C) drying said impregnated or sprayed mixture of metal oxides and (D) calcining said dried mixture of metal oxides at a temperature of from about 400.degree. C to about 850.degree. C, wherein said calcining (D) is at a temperature lower than said calcining (A).

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Kanagawa, Japan

Kiyoshi Moriya