Abstract: An object of the present invention is to provide a water-metachromatic fabric sheet having a color range of gradation in similar colors, for example, from a light blue region in the dried state to a dark blue region in the water-containing state. As a solution, a mixture layer containing porous particulate aluminum silicate and a colorant is printed on a surface of a fabric, wherein the mixture layer has a second mixture layer prepared by dispersing and fixing porous particulate aluminum silicate and a colorant in a binder resin and a first mixture layer prepared by dispersing and fixing porous particulate aluminum silicate and a colorant in a binder resin.

Abstract: An insect repellent device and a method for manufacturing the same, the insect repellent device containing an active ingredient being volatilizable at normal temperature. An insect repellent device adapted to volatilize an active ingredient contained in an insect controlling agent by waving motion includes a frame and a face-forming member, which is fixed to the frame. The face-forming member has on its entire surface a coating layer formed by surface treatment such as varnishing. The coating layer holds the insect controlling agent containing the active ingredient being volatilizable at normal temperature. The ingredient volatilizes from the coating layer, thereby exerting an effect of an insect-repellent. The coating layer is formed by the surface treatment using a surface treatment agent containing the insect controlling agent, which has been prepared by adding the insect controlling agent to a surface treatment agent.

Abstract: The present invention relates to: a method for producing ?-hydroxycarboxylic acid, which comprises hydrolyzing cyanohydrin in the presence of a hydrocarbon solvent; a method for producing optically active ?-hydroxycarboxylic acid, which comprises: producing optically active cyanohydrin by performing a reaction between a carbonyl compound and hydrogen cyanide, using a solvent comprising at least one organic solvent selected from a group consisting of an alcoholic solvent, an ester solvent, an ethereal solvent and a carboxylic solvent; removing said organic solvent from said reaction solvent; and hydrolyzing the remaining reaction mixture without isolating optically active cyanohydrin; a method for producing optically active ?-hydroxycarboxylic acid, which comprises hydrolyzing optically active cyanohydrin, using at most 10 equivalents of mineral acid relative to said optically active cyanohydrin under the condition that maximum temperature when reacting is 90° C.

Abstract: A method of crystallizing optically active mandelic acids characterized in that it comprises adding alkali to an aqueous solution comprising optically active mandelic acids and mineral acid for partial neutralization, and then crystallizing the optically active mandelic acids from the aforementioned aqueous solution.

Abstract: The present invention relates to:

Abstract: A catalyst which is capable of decomposing and allaying particularly NOx among other harmful components in the diesel engine exhaust gas and, at the same time, depriving by combustion the exhaust gas of carbonaceous particulates, unburned hydrocarbons, and carbon monoxide and a method for purifying the diesel engine exhaust gas by the use of this catalyst are provided. The catalyst for the decomposition of the nitrogen oxides has a refractory three-dimensional structure coated with a copper-containing zirconia powder having deposited copper and the catalytically active oxide of at least one metal selected from the group consisting of tungsten, gallium, nickel, manganese, iron, and cobalt on a zirconia powder. The method for purifying the diesel engine exhaust gas uses the catalyst.

Abstract: A nuclear halogenated aromatic compound possessing cyano groups is produced by a method using as a raw material an aromatic compound which possesses cyano groups and assumes a solid state at room temperature and subjecting the raw material to a procedure comprising a step of melting and transporting the compound by a means transport-melting, a step of vaporizing the compound, a step of mixing the compound with a halogen gas, and a step of causing the vapor of the compound to react with the halogen gas in vapor phase in the presence of a catalyst sequentially in the order mentioned, which comprises maintaining a content of a self-condensate of the aromatic compound possessing cyano groups which arise during the melting of the aromatic compound possessing cyano groups in a gas of the compound which reacts with the halogen gas to a level of not more than 2.5 mol % based on the compound.

Abstract: A nuclear halogenated aromatic compound possessing cyano groups is produced by a method using as a raw material an aromatic compound which possesses cyano groups and assumes a solid state at room temperature and subjecting the raw material to a procedure comprising a step of melting and transporting the compound by a means transport-melting, a step of vaporizing the compound, a step of mixing the compound with a halogen gas, and a step of causing the vapor of the compound to react with the halogen gas in vapor phase in the presence of a catalyst sequentially in the order mentioned, which comprises maintaining a content of a self-condensate of the aromatic compound possessing cyano groups which arise during the melting of the aromatic compound possessing cyano groups in a gas of the compound which reacts with the halogen gas to a level of not more than 2.5 mol % based on the compound.

Abstract: A method of producing naphthalenedicarboxylic acids by the oxidation of dialkyl-substituted naphthalene with a gas containing molecular oxygen in an organic solvent and in the presence of a catalyst comprising copper and bromine, or a catalyst comprising copper, bromine and at least one kind of element/compound selected from the group of consisting of amine compounds and heavy metallic elements which are vanadium, manganese, iron, nickel, palladium and cerium. And a method of producing diaryldicarboxylic acids by the oxidation of dialkyl-substituted diaryl compounds with a gas containing molecular oxygen in an organic solvent and in the presence of the same catalyst. These methods permit high yields of naphthalenedicarboxylic acids of high purity and of diaryldicarboxylic acids of high purity with the use of small amounts of catalyst.

Abstract: A method of preparing alkylnaphthalene compounds by reaction of a compound of naphthalene or monoalkylnaphthalene with olefin in the presence of a heteropoly acid catalyst. The method enables to produce highly valuable 2-monosubstituted alkylnaphthalene compounds or 2,6-disubstituted alkylnaphthalene compounds, in a high selectivity and a high yield. The used catalyst may be readily recovered and re-utilized.

Abstract: A method of producing naphthalenedicarboxylic acids by the oxidation of dialkyl-substituted naphthalene with a gas containing molecular oxygen under liquid phase conditions in an organic solvent and in the presence of a catalyst comprising copper and bromine, or a catalyst comprising copper, bromine and at least one kind of element/compound selected from the group of consisting of amine compounds and heavy metallic elements which are vanadium, manganese, iron, cobalt, nickel, palladium and cerium. And a method of producing diaryldicarboxylic acids by the oxidation of dialkyl-substituted diaryl compounds with a gas containing molecular oxygen in an organic solvent and in the presence of the same catalyst. These methods permit high yields of naphthalenedicarboxylic acids of high purity and of diaryldicarboxylic acids of high purity with the use of small amounts of catalyst.