乙炔
工艺安全
相(物质)
过程(计算)
咔唑
高压
材料科学
化学
化学工程
有机化学
工程类
计算机科学
工程物理
化工厂
操作系统
作者
Yao Mu,Jiahe Fan,Bozhao Chu,Siqing Zhong,Yi Cheng
标识
DOI:10.1016/j.cej.2024.152642
摘要
In this study, a continuous high-pressure liquid-phase acetylene microreaction process is rationally designed and successfully realized by employing the strategy of decoupling the acetylene dissolution and successive reaction. As the acetylene reaction is operated in a pure liquid phase with high acetylene concentration, the safety and efficiency of the acetylene conversion process are greatly improved. As a result, N-vinylcarbazole (NVC) is continuously synthesized from dissolved acetylene at 165 °C and 4.5 MPa. Compared to the conventional batch process, the reaction time is reduced to 5–20 min from 5 to 6 h, the amount of catalyst is reduced by 14.8 times, and the specific activity (g carbazole /g KOH /min) is increased by 220 times. To further increase the yield of NVC, 4-tert-butylcatechol (TBC) is added to the feedstock as a polymerization inhibitor, which improves the yield of NVC to 88 %. Several other vinyl compounds, in addition to NVC, are also continuously synthesized from acetylene using this method, which suggests that the process decoupling reaction strategy is widely applicable to acetylene-involved reactions.
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