6-氨基己腈催化加氢制备己二胺的工艺研究及优化  

Study and optimization of process for preparing hexanediamine by hydrogenation of 6-aminocapronitrile

作　　者：柴勇利 李明[1,2] 郑洋 崔炳春[1,2] 李雅楠 CHAI Yong-li;LI Ming;ZHENG Yang;CUI Bing-chun;LI Ya-nan(Henan Chemical Industry Research Institute Co.,Ltd.,Zhengzhou 450052,China;Research Center for Chemical Catalysis and New Functional Materials Innovation of Henan Academy of Sciences,Zhengzhou 450052,China)

机构地区：[1]河南省化工研究所有限责任公司,河南郑州450052 [2]河南省科学院化学催化与新型功能材料创新研究中心,河南郑州450052

出　　处：《化学工程师》2024年第7期5-8,31,共5页Chemical Engineer

基　　金：河南省科学院重大科研聚焦专项(No.190108001)。

摘　　要：目前己二胺产品结构性短缺的主要原因在于原料己二腈产能受限。为解决这一问题,提出了一种己内酰胺氨化制备6-氨基己腈并用6-氨基己腈替代关键原料己二腈,采用自制镍钴催化剂加氢合成己二胺的新工艺路线。通过调整加氢反应工艺参数得出,当反应温度为75℃、反应时间为3h、催化剂加入量为6-氨基己腈质量的3%、H_(2)压力为3.0MPa、搅拌速率为500r·min^(-1)、无氨的条件下,6-氨基己腈加氢反应效果最佳。通过气相色谱(GC)分析得出,该最佳工艺条件下,6-氨基己腈转化率达到99%,己二胺选择性达到99%,己二胺产品质量达到国标HG/T 3937-2007一等品标准。研究结果表明,本工艺具有过程简单、工艺安全性高、无三废排放、设备投资低的显著优点。随着国内己内酰胺产能扩大,该工艺路线成本会进一步降低,这对打破生产己二胺的前驱原料己二腈长期受控于国外生产厂商垄断的局面提供了新的选择。At present,the main reason for the structural shortage of hexanediamine products lies in the limited capacity of raw material adiponitrile.In order to solve this problem,a new process route of preparing 6-aminohexonitrile by caprolactam ammoniation,replacing the key raw material adiponitrile with 6-aminohexonitrile,and using self-made nickel cobalt catalyst to synthesize hexanediamine was proposed.By adjusting the hydrogenation process parameters,it is concluded that when the reaction temperature is 75℃,the reaction time is 3h,the amount of catalyst added is 3%of the mass of 6-aminohexonitrile,the hydrogen pressure is 3.0MPa,the stirring rate is 500r·min^(-1),and there is no ammonia,the hydrogenation effect of 6-aminohexonitrile is the best.Through gas chromatography(GC)analysis,it is concluded that under the optimal process conditions,the conversion rate of 6-aminocapronitrile reaches 99%,the selectivity of hexanediamine reaches 99%,and the product quality of hexanediamine reaches the national standard HG/T 3937-2007 first-class product standard.The results show that the process has the advantages of simple process,high process safety,no three-wastes discharge and low equipment investment.With the expansion of domestic caprolactam capacity,the cost of this process route will be further reduced,which provides a new choice to break the long-term monopoly of foreign manufacturers on adiponitrile,the precursor material for the production of hexanediamine.

关 键 词：6-氨基己腈 加氢 催化剂 己二胺 优化 

分 类 号：TQ236[化学工程—有机化工]