METHOD OF MANUFACTURING epsi-CAPROLACTAM

METHOD OF MANUFACTURING epsi-CAPROLACTAM

PROBLEM TO BE SOLVED: To provide a method of manufacturing a high quality lactam from a crude lactam by continuously, effectively and economically removing impurities in an industrial scale. SOLUTION: This method of manufacturing -caprolactam comprises concurrently pouring (A) melted crude -caprolac...

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Hauptverfasser: SHIMAZU YASUKI, FUKAO MASAMI, KAIDA HIROYUKI
Format: Patent
Sprache:eng
Schlagworte:
APPARATUS THEREFOR
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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creator SHIMAZU YASUKI
FUKAO MASAMI
KAIDA HIROYUKI
description PROBLEM TO BE SOLVED: To provide a method of manufacturing a high quality lactam from a crude lactam by continuously, effectively and economically removing impurities in an industrial scale. SOLUTION: This method of manufacturing -caprolactam comprises concurrently pouring (A) melted crude -caprolactam and (B) an aliphatic hydrocarbon solvent or (B') a mixed solvent comprising the aliphatic hydrocarbon solvent and a small amount of an organic solvent having a higher polarity than that of the aliphatic hydrocarbon at a temperature lower than the component (A) into a vessel and mixing to crystalline the -caprolactam and then carrying out a solid-liquid separation.
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subjects APPARATUS THEREFOR
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
title METHOD OF MANUFACTURING epsi-CAPROLACTAM
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