The present invention relates to a fluidized bed reactor. The fluidized bed reactor includes: a catalyst bed; a dust collector provided in an upper portion of the fluidized bed reactor collecting catalyst particles in a gas discharged toward the upper portion of the fluidized bed reactor; and a filter portion provided in a region between the dust collector and the catalyst bed, wherein the filter portion includes a filtering screen and a plurality of conical caps coupled to the filtering screen.

The present invention relates to a fluidized bed reactor. The fluidized bed reactor includes: a catalyst bed; a dust collector provided in an upper portion of the fluidized bed reactor collecting catalyst particles in a gas discharged toward the upper portion of the fluidized bed reactor; and a filter portion provided in a region between the dust collector and the catalyst bed, wherein the filter portion includes a filtering screen and a plurality of conical caps coupled to the filtering screen.

A catalyst comprising molybdenum, bismuth, iron, and nickel, wherein a proportion of a surface concentration of the nickel to a bulk concentration of the nickel is 0.60 to 1.20.

A catalyst comprising molybdenum, bismuth, iron, and nickel, wherein a proportion of a surface concentration of the nickel to a bulk concentration of the nickel is 0.60 to 1.20.

A catalyst comprising Mo, Bi, and Fe, and satisfying, in an X-ray diffraction analysis, 0.10<P/R<0.18 and 0.06<Q/R<0.30 where P represents a peak intensity at 2θ=22.9±0.2°, Q represents a peak intensity at 2θ=28.1±0.1°, and R represents a peak intensity at 2θ=26.6±0.2°.

A catalyst comprising Mo, Bi, and Fe, and satisfying, in an X-ray diffraction analysis, 0.10<P/R<0.18 and 0.06<Q/R<0.30 where P represents a peak intensity at 2θ=22.9±0.2°, Q represents a peak intensity at 2θ=28.1±0.1°, and R represents a peak intensity at 2θ=26.6±0.2°.

The present disclosure relates to a process for stabilizing an antimony ammoxidation catalyst in an ammoxidation process. The process may comprise providing an antimony ammoxidation catalyst to a reactor; reacting propylene with ammonia and oxygen in the fluidized bed reactor in the presence of the antimony ammoxidation catalyst to form a crude acrylonitrile product; and adding an effective amount of an antimony-containing compound to the antimony ammoxidation catalyst to maintain catalyst conversion and selectivity; wherein the antimony-containing compound has a melting point less than 375° C. The present disclosure also relates to catalyst compositions and additional processes using the antimony ammoxidation catalyst stabilized by an antimony-containing compound.

The present disclosure relates to a process for stabilizing an antimony ammoxidation catalyst in an ammoxidation process. The process may comprise providing an antimony ammoxidation catalyst to a reactor; reacting propylene with ammonia and oxygen in the fluidized bed reactor in the presence of the antimony ammoxidation catalyst to form a crude acrylonitrile product; and adding an effective amount of an antimony-containing compound to the antimony ammoxidation catalyst to maintain catalyst conversion and selectivity; wherein the antimony-containing compound has a melting point less than 375° C. The present disclosure also relates to catalyst compositions and additional processes using the antimony ammoxidation catalyst stabilized by an antimony-containing compound.

There are provided an ammoxidation catalyst for propylene, a manufacturing method of the same, and an ammoxidation method of propylene using the same. Specifically, according to one embodiment of the invention, a catalyst is realized with a structure in which metal oxide is supported on a silica carrier, and thus, using mesopores useful for adsorption and desorption of gas, a high reaction surface area can be provided, and ultimately, ammoxidation of propylene can be increased.

There are provided an ammoxidation catalyst for propylene, a manufacturing method of the same, and an ammoxidation method of propylene using the same. Specifically, according to one embodiment of the invention, a catalyst is realized with a structure in which metal oxide is supported on a silica carrier, and thus, using mesopores useful for adsorption and desorption of gas, a high reaction surface area can be provided, and ultimately, ammoxidation of propylene can be increased.