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己内酰胺制备氨基己腈工艺过程中杂质的测定
Determination of Impurities in the Process of Preparing Aminocapronitrile from Caprolactam
【摘要】 采用全二维气相色谱-质谱联用仪(GC×GC-MS)对己内酰胺氨化制备氨基己腈的反应液进行分析,得知己内酰胺制备氨基己腈反应液中含有环己亚胺、5-己烯腈、2-亚甲基-4-戊烯腈、氰基-1-环戊烯等副产物。当调整工艺路线和催化剂配方时,己内酰胺制备氨基己腈的副产物成分会随之变化。多次实验表明,副产物环己亚胺、5-己烯腈是己内酰胺制备氨基己腈反应中的主要副产物,为后续精馏得到纯度为99.9%的氨基己腈提供了依据。
【Abstract】 The reaction solution for the preparation of aminocapronitrile from caprolactam is analyzed by full two-dimensional gas chromatography-mass spectrometry( GC × GC-MS). It is found that the reaction solution for the preparation of aminocapronitrile from caprolactam contained by-products such as cycloheximide,5-hexenenitrile,2-methylene-4-pentenenitrile and cyano-1-cyclopentene. When the process route and catalyst formula adjusting,the composition of the by-product from caprolactam to aminocapronitrile will change. Through many experiments,many experiments show that the by-products cycloheximide and 5-hexenenitrile are the main by-products in the preparation of aminocapronitrile from caprolactam,which provides good data support for the subsequent distillation to obtain aminocapronitrile with purity of 99. 9%.
【Key words】 caprolactam; aminocapronitrile; cycloheximide; 5-hexenenitrile;
- 【文献出处】 河南化工 ,Henan Chemical Industry , 编辑部邮箱 ,2022年11期
- 【分类号】TQ226.61
- 【下载频次】11