文献类型：期刊文献

英文题名：Toward reactive extraction processes for synthesizing long-chain esters: A general approach by tuning bifunctional deep eutectic solvent

作者：Wang, Ruizhuan[1];Qin, Hao[2];Song, Zhen[1];Cheng, Hongye[1];Chen, Lifang[1];Qi, Zhiwen[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Otto von Guericke Univ, Proc Syst Engn, D-39106 Magdeburg, Germany

年份：2022

卷号：445

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20221912102317);WOS:【SCI-EXPANDED(收录号:WOS:000803626400001)】；

基金：Acknowledgment The financial support from National Natural Science Foundation of China (21978096 and 21776074) is greatly acknowledged.

语种：英文

外文关键词：Esterification; Reactive extraction; Bifunctional solvent; Deep eutectic solvent; COSMO-RS

摘要：The synthesis of long-chain esters in reactive extraction using bifunctional deep eutectic solvent (DES) demands a wide solvent selection range and optimal solvent choice. In this work, a general approach towards rational DES selection is presented. First, novel halogen-free DESs based on triazole and p-toluenesulfonic acid (PTSA) or benzenesulfonic acid (BSA) are prepared to expand the selection range of Bronsted acidic DESs, whose binary solid-liquid phase diagrams are measured to confirm the DES formation. Then, the triazole-PTSA/BSA DESs together with the imidazole (Im)-PTSA/BSA DESs are characterized by pH measurement, H-1-NMR characterization, and COSMO-RS interaction energy analysis, which reflect a two-step formation mechanism. The ImPTSA/BSA DESs are acid-base tunable while the triazole-PTSA/BSA DESs are tunable from weak acid to strong acid. Afterwards, four strong acidic DESs at the eutectic compositions namely [Im:2BSA], [Im:2PTSA], [triazole:4BSA] and [triazole:4PTSA] are determined as dual solvent-catalyst for the intensified esterification with ester carbon chain length changing from C6 to C11. Combining sigma-potential thermodynamic analysis with experimental results, the applicable boundary and change rule of carbon chain length versus different DESs are clarified. On this basis, a rational DES selection strategy is formulated aiming to the development of reactive extraction for synthesizing different long-chain esters.