A catalyst containing molybdenum, bismuth, and iron, in which R1 represented by the following equation (1) is 0.45 or more and 5.00 or less is provided, and use of the catalyst achieves a high yield, in the case of the use in a gas phase oxidation reaction, particularly in the case of the use in producing an unsaturated aldehyde compound or an unsaturated carboxylic acid compound by a partial oxidation reaction,

[00001]$\begin{array}{cc}R1=\left(\mathrm{maximum}\mathrm{value}\mathrm{of}\mathrm{peak}\mathrm{at}886{\mathrm{cm}}^{-1}?5{\mathrm{cm}}^{-1}\right)?\left(\mathrm{maximum}\mathrm{value}\mathrm{of}\mathrm{peak}\mathrm{at}354{\mathrm{cm}}^{-1}?5{\mathrm{cm}}^{-1}\right)\mathrm{as}\mathrm{measured}\mathrm{by}\mathrm{Raman}\mathrm{spectroscopy}.& \left(1\right)\end{array}$

The present disclosure relates generally to catalyst materials and processes for making and using them. More particularly, the present disclosure relates to molybdenum, bismuth and iron-containing metal oxide catalyst materials useful, for example, in the partial oxidation or ammoxidation of propylene or isobutylene, processes for making them, and processes for making acrolein, methacrolein, acrylonitrile, and methacrylonitrile using such catalysts.

The present invention relates to a process for producing mixed oxide catalysts on the basis of molybdenum and bismuth oxides in which the precursor compounds of the components of mixed oxide catalysts provided in the form of a solution and/or suspension are subjected to a spray-drying with a specific temperature regime and the spray particles obtained in this way are then calcined to yield a catalytic active mass, and to the mixed oxide catalysts obtainable by this process and to the use of these catalysts in the partial oxidation of olefms, in particular in the partial gas phase oxidation of propene to acrolein and acrylic acid. The spray drying of the precursor compounds containing solution or suspension is performed in concurrent with a gas stream having a specific entrance temperature. Alternatively, when the main gas stream has a higher entrance temperature, an additional colder gas stream can be fed in downstream. The thus obtained mixed oxide catalysts give lower a maximum temperature in the hot spot of catalyst fixed bed when they are used in the partial gas phase oxidation of olefms.

A supported molded catalyst having increased hardness, the supported molded catalyst being capable of improving the long-term stability of a reaction for producing a conjugated diolefin by catalytic oxidative dehydrogenation from a mixed gas including a monoolefin having 4 or more carbon atoms and molecular oxygen; and a method for producing the catalyst is provided. A molded catalyst for conjugated diolefin production, the molded catalyst being a catalyst for producing a conjugated diolefin by a catalytic oxidative dehydrogenation reaction from a mixed gas including a monoolefin having 4 or more carbon atoms and molecular oxygen, and being produced by molding a composite metal oxide and a glass fiber-like inorganic auxiliary agent.

The present invention relates to a catalyst having at least one peak in each of a range of a pore diameter of 0.45 m to 10.0 m and a range of a pore diameter of 0.040 m to 0.45 m in a pore distribution (dV/d (log D) vs D) measured by mercury porosimetry, in which when a maximum value of dV/d (log D) in the range of the pore diameter of 0.45 m to 10.0 m is represented by A and a maximum value of dV/d (log D) in the range of the pore diameter of 0.040 m to 0.45 m is represented by B, (B/A) is 0.20 to 13.0 (V represents a volume (unit: mL/g) of filled mercury per sample weight, D represents the pore diameter (unit: m), log D represents a natural logarithm of D, and dV/d (log D) represents a reciprocal of a value obtained by differentiating a cumulative pore volume in a specific pore diameter range by a logarithm of the pore diameter).

Provided is a method for producing an unsaturated aldehyde and/or an unsaturated carboxylic acid, which enables one to achieve an operation stably over a long period of time while improving an effective yield, even in a high-load reaction, and in the method for producing an unsaturated aldehyde and/or an unsaturated carboxylic acid, multilayer filling of stacking two or more catalyst layers each containing a complex metal oxide catalyst in the axial direction of the tube under specified conditions is performed, and the catalyst layer on the most gas outlet side in the tube axis contains a catalyst containing a compound represented by a specified formulation formula.

The present invention relates to a process for producing a composite material and also the composite material itself. The composite material contains a bismuth-molybdenum-nickel mixed oxide or a bismuth-molybdenum-cobalt mixed oxide and a specific SiO2 as pore former. The present invention also relates to the use of the composite material according to the invention for producing a washcoat suspension and also a process for producing a coated catalyst using the composite material according to the invention. Furthermore, the present invention also relates to a coated catalyst which has a catalytically active shell comprising the composite material according to the invention on a support body. The coated catalyst according to the invention is used for preparing [alpha],[beta]-unsaturated aldehydes from olefins.

A catalytic composition useful for the conversion of an olefin selected from the group consisting of propylene, isobutylene or mixtures thereof, to acrylonitrile, methacrylonitrile, and mixtures thereof. The catalytic composition comprises a complex of metal oxides comprising rubidium, bismuth, cerium, molybdenum, iron and other promoters, with a desirable composition.

A catalytic composition and process useful for the conversion of an olefin selected from the group consisting of propylene, isobutylene or mixtures thereof, to acrylonitrile, methacrylonitrile, hydrogen cyanide and acetonitrile and mixtures thereof, wherein the catalyst exhibiting increased selectivity to hydrogen cyanide compared to prior art catalysts.

The present invention relates to a bismuth molybdate-based composite oxide catalyst having a microporous zeolite coating layer on the surface thereof and thus having high selectivity for 1,3-butadiene, a method of preparing the same, and a method of preparing 1,3-butadiene using the same. The catalyst has a microporous zeolite coating layer, and thus enables only gaseous products (light) to selectively pass through the zeolite coating layer, improving selectivity for 1,3-butadiene.