Synthesis and kinetics of 2,5-dicyanofuran in the presence of hydroxylamine ionic liquid salts  

作　　者：Xuan Gao Zhihui Li Dongsheng Zhang Xinqiang Zhao Yanji Wang 

机构地区：[1]Hebei Provincial Key Lab of Green Chemical Technology and High Efficient Energy Saving,Hebei University of Technology,Tianjin 300130,China [2]School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300130,China

出　　处：《Chinese Journal of Chemical Engineering》2023年第1期310-316,共7页中国化学工程学报（英文版）

基　　金：support from the National Natural Science Foundation of China(Nos.U20A20152,21236001 and 21878069).

摘　　要：2,5-Dicyanofuran(DCF)is an important biomass-derived platform compound primarily used to prepare bio-based adiponitrile,which is the key precursor for the synthesis of nylon 66 and 1,6-hexanediisocyanate(HDI).In this study,one-pot,green and safe synthesis of DCF from 2,5-diformylfuran(DFF)and hydroxylamine ionic liquid salts was proposed.Eco-friendly hydroxylamine ionic liquid salts were used as the nitrogen source.Ionic liquid exhibited three-fold function of cosolvent,catalysis and phase separation.The conversion of DFF and yield of DCF reached 100%under the following optimum reaction conditions:temperature of 120℃ for 70 min,volume ratio of paraxylene:[HSO_(3)-b-Py]
HSO4 of 2:1,and molar ratio of DFF:(NH_(2)OH)_(2)
[HSO_(3)-b-Py]
HSO4 of 1:1.5.The reaction mechanism for the synthesis of DCF was proposed,and the kinetic model was established.The reaction order with respect to DFF and intermediate product 2,5-diformylfuran dioxime(DFFD)was 1.06 and 0.16,and the reaction activation energy was 64.07 kJ·mol^(-1) and 59.37 kJ·mol^(-1) respectively.After the reaction,the ionic liquid was easy to separate,recover and recycle.

关 键 词：2 5-Dicyanofuran Hydroxylamine ionic liquid salts Green synthesis KINETICS 

分 类 号：TQ251.1[化学工程—有机化工]