Cyanoethylation of phenylamine is one of the important steps for the production of dicyanoethyl-based disperse dyes.However,the exothermic nature of this reaction and the inherent instability of intermittent dynamic o...Cyanoethylation of phenylamine is one of the important steps for the production of dicyanoethyl-based disperse dyes.However,the exothermic nature of this reaction and the inherent instability of intermittent dynamic operation pose challenges in achieving both high safety and reaction efficiency.In this study,a continuous cyanoethylation of phenylamine for synthesizing N,N-dicyanoethylaniline in a microreactor system has been developed.By optimizing the reaction conditions,the reaction time was significantly reduced from over 2 h in batch operation to approximately 14 min in the microreactor,while high conversion and selectivity were maintained.Based on the reaction network constructed,the reaction kinetics was established,and the kinetic parameters were then determined.These findings provide valuable insights into a controllable cyanoethylation reaction,which would be helpful for the design of efficient processes and optimization of reactors.展开更多
P-methoxy-N,N-bis(2-cyanoethyl)aniline was synthesized by using p-methoxyaniline,acrylonitrile,AlCl3 and BE.The experimental result had proved that AlCl3 and BE was an excellent catalyst system.The appropriate reactiv...P-methoxy-N,N-bis(2-cyanoethyl)aniline was synthesized by using p-methoxyaniline,acrylonitrile,AlCl3 and BE.The experimental result had proved that AlCl3 and BE was an excellent catalyst system.The appropriate reactive condition is that AlCl3 was 20%(mol) of p-methoxyaniline,BE was 10%(mol) of p-methoxyaniline,the reaction temperature was 78℃ and the reaction time was 8 hours.The catalyst system had high catalyst efficiency and selectivity together with yield over 94%.展开更多
基金the financial supports from National Natural Science Foundation of China(22378344,22208278)Natural Science Foundation of Shandong Province(ZR2023MB120,ZR2023QB152)Youth Innovation Team Plan of Shandong Province(2022KJ270)。
文摘Cyanoethylation of phenylamine is one of the important steps for the production of dicyanoethyl-based disperse dyes.However,the exothermic nature of this reaction and the inherent instability of intermittent dynamic operation pose challenges in achieving both high safety and reaction efficiency.In this study,a continuous cyanoethylation of phenylamine for synthesizing N,N-dicyanoethylaniline in a microreactor system has been developed.By optimizing the reaction conditions,the reaction time was significantly reduced from over 2 h in batch operation to approximately 14 min in the microreactor,while high conversion and selectivity were maintained.Based on the reaction network constructed,the reaction kinetics was established,and the kinetic parameters were then determined.These findings provide valuable insights into a controllable cyanoethylation reaction,which would be helpful for the design of efficient processes and optimization of reactors.
文摘P-methoxy-N,N-bis(2-cyanoethyl)aniline was synthesized by using p-methoxyaniline,acrylonitrile,AlCl3 and BE.The experimental result had proved that AlCl3 and BE was an excellent catalyst system.The appropriate reactive condition is that AlCl3 was 20%(mol) of p-methoxyaniline,BE was 10%(mol) of p-methoxyaniline,the reaction temperature was 78℃ and the reaction time was 8 hours.The catalyst system had high catalyst efficiency and selectivity together with yield over 94%.
