Abstract: An object of the present invention is to provide a powder of high-purity 1,4-cyclohexanedicarboxylic acid with excellent powder flowability. The invention provides a powder of high-purity 1,4-cyclohexanedicarboxylic acid having particle size distributions (volume basis) such that D10 is within a range of 5 to 55 ?m, D50 is within a range of 40 to 200 ?m, and D90 is within a range of 170 to 800 ?m; and having an aerated bulk density of 0.4 to 0.8 g/cm3, a packed bulk density of 0.5 to 1.0 g/cm3, and a compressibility of 10 to 23%.

Abstract: An object of the present invention is to provide a powder of high-purity 1,4-cyclohexanedicarboxylic acid with excellent powder flowability. The invention provides a powder of high-purity 1,4-cyclohexanedicarboxylic acid having particle size distributions (volume basis) such that D10 is within a range of 5 to 55 ?m, D50 is within a range of 40 to 200 ?m, and D90 is within a range of 170 to 800 ?m; and having an aerated bulk density of 0.4 to 0.8 g/cm3, a packed bulk density of 0.5 to 1.0 g/cm3, and a compressibility of 10 to 23%.

Abstract: An alicyclic unsaturated alcohol (for example, tetrahydrobenzyl alcohol) having the purity of 99% by weight or more, the water content of 0.1% by weight or less and the acid value of 0.1 mg KOH/g or less can be produced, with high selectivity, by hydrogenating using an unsaturated cyclic aldehyde having the acid value of 10 mg KOH/g or less as a raw material; terminating the hydrogenation in the conversion of 70 to 99.8%; and rectifying the reaction product containing the unreacted unsaturated cyclic aldehyde. The high purity alicyclic unsaturated alcohol is useful as raw material chemicals for synthesizing drugs, agricultural chemicals, perfumes, and dyes etc.

Abstract: An alicyclic unsaturated alcohol (for example, tetrahydrobenzyl alcohol) having the purity of 99% by weight or more, the water content of 0.1% by weight or less and the acid value of 0.1 mg KOH/g or less can be produced, with high selectivity, by hydrogenating using an unsaturated cyclic aldehyde having the acid value of 10 mg KOH/g or less as a raw material; terminating the hydrogenation in the conversion of 70 to 99.8%; and rectifying the reaction product containing the unreacted unsaturated cyclic aldehyde. The high purity alicyclic unsaturated alcohol is useful as raw material chemicals for synthesizing drugs, agricultural chemicals, perfumes, and dyes etc.

Abstract: The present invention relates to cellulose fibers excellent in dirt removability and a method of treatment thereof. The cellulose fibers of the invention are liquid ammonia-treated cellulose fibers whose partial or entire exterior is coated with an ester of (A) a polycarboxylic acid having at least three carboxyl groups and (B) a hydrophilic polyol having an oxyethylene group or groups and at least two alcoholic hydroxyl groups and/or which fibers are impregnated with the ester.

Abstract: In treating a cellulose fiber article with 1,2,3,4-butanetetracarboxylic acid to improve properties, 1,2,3,4-butanetetracarboxylic acid containing up to 200 ppm of nitro radical is used, whereby the cellulose fiber article can be prevented from coloring to the utmost extent. The intended results of the invention can be achieved to a remarkable extent when using 1,2,3,4-butanetetracarboxylic acid containing up to 200 ppm of nitro radical and prepared by oxidizing tetrahydrophthalc acid and/or tetrahydrophthalic anhydride with hydrogen peroxide.

Abstract: This invention provides a thermoplastic resin composition comprising a thermoplastic resin and 0.1 to 100 parts by weight, per 100 parts by weight of the thermoplastic resin, of an imide compound prepared, e.g., by dehydration condensation of 1,2,3,4-butanetetracarboxylic acid or a monoanhydride or a dianhydride thereof with a primary amine, and a method of molding the resin composition.

Abstract: A yarn, cloth, woven fabric, knitted fabric or nonwoven fabric composed of natural cellulose fibers, each fiber having incorporated therein a water-insoluble inorganic metal compound, and each fiber having at least one cured polycarboxylic acid combined therewith, said polycarboxylic acid being one selected from the group consisting of polycarboxylic acids and partial salts thereof, and a process for preparing the same.

Abstract: Disclosed is a process for preparing a polycarboxylic acid, the process comprising subjecting a Diels-Alder reaction product of maleic anhydride and a diene and/or the corresponding acid to oxidative cleavage using hydrogen peroxide in the presence of at least one catalyst selected from the group consisting of tungstic acid, molybdic acid and heteropoly acids thereof.

Abstract: This invention provides a process for preparing carboxylic acid, the process comprising subjecting an oxidation product produced by reacting a peroxide with (a) unsaturated aliphatic monocarboxylic acid having at least one unsaturated bond in the carbon chain and containing 6 to 24 carbon atoms or its ester or (b) cyclic and/or acyclic aliphatic olefin having at least one unsaturated bond in the carbon chain to oxidation by oxygen or oxygen-containing gas in the presence of a catalyst comprising (i) at least one heavy metal compound and (ii) at least one member selected from the group consisting of a bromine compound and a chlorine compound.

Abstract: A process for preparing dibenzylidene sorbitols or dibenzylidene xylitols by reacting sorbitol or xylitol with a substituted or unsubstituted benzaldehyde or alkyl acetal derivative thereof in the presence of an acid catalyst, a hydrophobic organic solvent and a water-soluble organic polar solvent, the process being characterized by using the hydrophobic organic solvent in an amount sufficient to permit the resulting dibenzylidene sorbitols or dibenzylidene xylitols to separate out as crystals and capable of maintaining the reaction system in the form of a gel to solid phase and by conducting the reaction with forced agitation.