Toray Industries, Inc.

Masato Akahira

Katsushige Yamada

Daijiro Tsukamoto

Masateru Ito

Koji Yamauchi

Kenji Kawamura

Daisuke Yamamoto

Kohei Yamashita

Koya Kato

Ken Sudo

Eri Yasutake

The present invention relates to a method of producing ε-caprolactam, the method including the following steps (A) and (B): (A) a step of reacting 5-cyanovaleramide with hydrogen in an aqueous solvent in a presence of a hydrogenation catalyst to obtain a 5-cyanovaleramide hydrogenation reaction mixture; (B) a step of heating the 5-cyanovaleramide hydrogenation reaction mixture at a temperature of 180° C. or higher and 300° C. or lower in an aqueous solvent to obtain ε-caprolactam.

Method for producing ε-caprolactam

A method produces &#x3b5;-caprolactam through adipamide as an intermediate, and characteristically includes a lactamization step of reacting adipamide, formed from a material compound, with hydrogen and ammonia in the presence of a catalyst containing: a metal oxide mainly containing an oxide(s) of one or more metallic elements selected from the group consisting of metallic elements of group 5 and groups 7 to 14 in the 4th to 6th periods of the periodic table; and a metal and/or a metal compound having a hydrogenation ability.

Method for producing &#x3f5;-caprolactam

A method of producing &#x3b5;-caprolactam from 3-oxoadipic acid includes: step 1 of mixing at least one selected from the group consisting of 3-oxoadipic acid and salts thereof with a catalyst and a solvent in the presence of hydrogen to produce 3-hydroxyadipic acid; and step 2 of reacting the 3-hydroxyadipic acid which is a product of step 1, a salt or carboxylic acid derivative thereof, or a mixture of these with hydrogen and ammonia.

Method of producing epsilon-caprolactam

A method for selective production of &#x3b5;-caprolactam, wherein a substance inducible from a biomass resource is used as a material; the reaction process is short; ammonium sulfate is not produced as a by-product; and production of by-products is suppressed; is disclosed. The method for producing &#x3b5;-caprolactam comprises the step of reacting a particular compound inducible from a biomass resource, such as &#x3b1;-hydromuconic acid, 3-hydroxyadipic acid, or 3-hydroxyadipic acid-3,6-lactone, or a salt thereof with hydrogen or ammonia.

Method for producing epsilon-caprolactam

A polyester resin composition having excellent hydrolysis resistance and excellent transparency and a method of producing the same are provided. There is provided a polyester resin composition comprising a polyester resin that is obtained from a dicarboxylic acid or an ester-forming derivative thereof and a diol as main raw material; and a copper-containing compound and a chelate ligand compound having a nitrogen-containing heterocyclic structure or a tertiary amine structure that are mixed with the polyester resin.

Polyester resin composition and method for producing the same

An object is to provide a polyester resin having excellent hydrolysis resistance and good color tone and a method of producing the same. There is provided a polyester resin composition comprising a polyester resin that is prepared from a dicarboxylic acid or a dicarboxylic acid dialkyl ester and a diol as main raw material and mixed with: a copper halide; and at least one additive selected from the group consisting of compounds expressed by a formula (i) and compounds expressed by a formula (ii): MXn . . . (i) (where M denotes an alkali metal or an alkaline earth metal, X denotes at least one element selected from bromine, iodine and chlorine, and n=1 or 2); and (RCOO)nM . . . (ii) (where R denotes hydrogen or an alkyl group containing 1 to 30 carbon atoms, M denotes an alkali metal or an alkaline earth metal, and n=1 or 2).

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Nagoya, Japan

Masato Akahira