Abstract
Dimethyl carbonate(DMC)is a crucial chemical raw material widely used in organic synthesis,lithium-ion battery electrolytes,and various other fields.The current primary industrial process employs a conventional sodium methoxide basic catalyst to produce DMC through the transesterification reaction between vinyl carbonate and methanol.However,the utilization of this catalyst presents several chal-lenges during the process,including equipment corrosion,the generation of solid waste,susceptibility to deactivation,and complexities in separation and recovery.To address these limitations,a series of alkaline poly(ionic liquid)s,i.e.[DVBPIL][PHO],[DVCPIL][PHO],and[TBVPIL][PHO],with different cross-linking degrees and structures,were synthesized through the construction of cross-linked polymeric monomers and functionalization.These poly(ionic liquid)s exhibit cross-linked structures and control-lable cationic and anionic characteristics.Research was conducted to investigate the effect of the cross-linking degree and structure on the catalytic performance of transesterification in synthesizing DMC.It was discovered that the appropriate cross-linking degree and structure of the[DVCPIL][PHO]catalyst resulted in a DMC yield of up to 80.6％.Furthermore,this catalyst material exhibited good stability,maintaining its catalytic activity after repeated use five times without significant changes.The results of this study demonstrate the potential for using alkaline poly(ionic liquid)s as a highly efficient and sus-tainable alternative to traditional catalysts for the transesterification synthesis of DMC.
基金项目
National Key Research and Development Program of China(2022YFB4101800)
National Natural Science Foundation of China(22278077)
National Natural Science Foundation of China(22108040)
Key Program of Qingyuan Innovation Laboratory(00221004)
Research Program of Qingyuan Innovation Laboratory(00523006)
Natural Science Foundation of Fujian Province(2022J02019)
NETL
NSTL
万方数据