Provided is a composition for catalyst production which is used in the production of a catalyst for gas phase catalytic oxidation reaction or a catalyst for gas phase catalytic ammoxidation reaction, wherein the composition for catalyst production is an aqueous solution containing a niobium compound and hydrogen peroxide and optionally containing an organic acid, a molar ratio (organic acid/Nb) of a concentration of the organic acid to a Nb concentration is 0.00 or more and 2.00 or less, and a molar ratio (hydrogen peroxide/Nb) of a concentration of the hydrogen peroxide to a Nb concentration is 0.01 or more and 50 or less.

An air conditioning device is disclosed. The present air conditioning device comprises: a photocatalytic filter including a space through which air can pass and having a transition metal oxide formed in a nanotube form on the surface thereof, the transition metal oxide removing gases included in the air and including at least one of TiO.sub.2, ZnO, NiO, and WO.sub.3; and a light source for emitting light to the photocatalytic filter.

An air conditioning device is disclosed. The present air conditioning device comprises: a photocatalytic filter including a space through which air can pass and having a transition metal oxide formed in a nanotube form on the surface thereof, the transition metal oxide removing gases included in the air and including at least one of TiO.sub.2, ZnO, NiO, and WO.sub.3; and a light source for emitting light to the photocatalytic filter.

The present invention relates to a catalyst comprising at least one oxide of vanadium, at least one oxide of tungsten, at least one oxide of cerium, at least one oxide of titanium and at least one oxide of antimony, and an exhaust system containing said oxides.

The present invention relates to a catalyst comprising at least one oxide of vanadium, at least one oxide of tungsten, at least one oxide of cerium, at least one oxide of titanium and at least one oxide of antimony, and an exhaust system containing said oxides.

The present invention relates to a catalyst comprising at least one oxide of vanadium, at least one oxide of tungsten, at least one oxide of cerium, at least one oxide of titanium and at least one oxide of niobium, and an exhaust system containing said oxides.

The present invention relates to a catalyst comprising at least one oxide of vanadium, at least one oxide of tungsten, at least one oxide of cerium, at least one oxide of titanium and at least one oxide of niobium, and an exhaust system containing said oxides.

The present invention provides a regeneration method and a regeneration device of a poisoning honeycomb catalyst, and belongs to the field of catalyst regeneration. The regeneration method of the poisoning honeycomb catalyst provided by the present invention includes the following steps: carrying out microwave heating treatment on the poisoning honeycomb catalyst, and then spraying liquid nitrogen into cells of the poisoning honeycomb catalyst so that the poisoning honeycomb catalyst is regenerated. The regeneration method provided by the present invention is simple, and the efficiency of the regenerated catalyst can be increased by 90% more than the original efficiency. According to the regeneration device of a poisoning honeycomb catalyst provided by the present invention, the catalyst regeneration is carried out by using the regeneration device provided by the present invention, the regeneration operation is simple, and the catalytic efficiency of the regenerated catalyst is improved.

The present invention provides a regeneration method and a regeneration device of a poisoning honeycomb catalyst, and belongs to the field of catalyst regeneration. The regeneration method of the poisoning honeycomb catalyst provided by the present invention includes the following steps: carrying out microwave heating treatment on the poisoning honeycomb catalyst, and then spraying liquid nitrogen into cells of the poisoning honeycomb catalyst so that the poisoning honeycomb catalyst is regenerated. The regeneration method provided by the present invention is simple, and the efficiency of the regenerated catalyst can be increased by 90% more than the original efficiency. According to the regeneration device of a poisoning honeycomb catalyst provided by the present invention, the catalyst regeneration is carried out by using the regeneration device provided by the present invention, the regeneration operation is simple, and the catalytic efficiency of the regenerated catalyst is improved.

The present invention provides: a method for producing an epoxyalkane capable of obtaining an epoxide in a high yield while attaining a high olefin conversion rate and a high selectivity for epoxides even when an olefin includes a long carbon chain, and a solid oxidation catalyst. The method for producing an epoxyalkane of the present invention comprises reacting an olefin with an oxidant in the presence of a solid oxidation catalyst, wherein the solid oxidation catalyst comprises a transition metal and a carrier that supports the transition metal, and the carrier is a composite of a metal oxide with a phosphonic acid.