Industrial Process and Modern Technical Adaptations for Nylon 6 Monomer Caprolactam: A Mini Review

IF 0.8 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
Jing HUANG, Qimin LIU, Wangcheng WU, Yuehong MA, Jianhui HUANG
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引用次数: 0

Abstract

Caprolactam is in high demand in the new materials industry as a monomer for nylon and polyamides. Although the schemes of traditional processes such as hydroxylamine production (hydroxylamine sulphate oxime process, hydroxylamine phosphate oxime process, nitric oxide reduction process) and cyclohexanone production were still involved in the caprolactam production industry, the modern technical adaptations achieved higher atomic utilisation and higher selectivity. In this review, the basic traditional schemes for the production of caprolactam are for the first time presented. The modern technical adaptation, the rectification dehydrogenation of the by-product cyclohexane in cyclohexanone production, was highlighted to achieve an increase in atomic utilisation from 78 % to 98 %. The higher selectivity achieved with membrane separation resulted in a conversion of cyclohexanone of > 99.6 % and a selectivity of cyclohexanone oxime of > 99.5 %. In addition, the progress of the catalysts used in the modern technical adaptation was briefly discussed. This review highlights the modern process with atom economy and high selectivity.
尼龙6单体己内酰胺的工业工艺和现代技术改造综述
己内酰胺作为尼龙和聚酰胺的单体,在新材料工业中需求量很大。虽然传统工艺方案,如羟胺生产(硫酸羟胺肟法、磷酸羟胺肟法、一氧化氮还原法)和环己酮生产仍然涉及到己内酰胺生产工业,现代技术改造实现了更高的原子利用率和更高的选择性。本文首次介绍了己内酰胺生产的基本传统工艺方案。重点介绍了环己酮生产副产物环己烷的精馏脱氢技术,使原子利用率从78%提高到98%。膜分离获得了更高的选择性,导致环己酮的转化;对环己酮肟的选择性为99.6%;99.5%。此外,还简要讨论了催化剂在现代技术改造中的应用进展。本文重点介绍了具有原子经济性和高选择性的现代工艺。
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来源期刊
Materials Science-medziagotyra
Materials Science-medziagotyra 工程技术-材料科学:综合
CiteScore
1.70
自引率
10.00%
发文量
92
审稿时长
6-12 weeks
期刊介绍: It covers the fields of materials science concerning with the traditional engineering materials as well as advanced materials and technologies aiming at the implementation and industry applications. The variety of materials under consideration, contributes to the cooperation of scientists working in applied physics, chemistry, materials science and different fields of engineering.
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