Method for producing ε-caprolactam
AssigneeToray Industries, Inc.
InventorsDaijiro Tsukamoto, Kenji Kawamura, Katsushige Yamada, Masato Akahira, Daisuke Yamamoto
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Abstract
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.
Claims7
A method of producing ε-caprolactam, the method comprising 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.
An ε-caprolactam composition having a ratio of 6-aminocaproic acid amide to ε-caprolactam of 0.1 mol % or more and 5 mol % or less, and comprising no ammonia.
Dependencies are inferred from the claim text.