凝胶树脂负载离子液体固体酸催化酯化反应性能

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摘要针对酯化反应传统浓硫酸催化剂易腐蚀和产生大量含酸废水难题,通过一锅法将离子液体负载于凝胶树脂上,制备了绿色高效的凝胶树脂负载离子液体固体酸(SA-ILs)催化剂。研究表明:凝胶树脂载体具有强吸水结构,离子液体通过化学键共价负载在凝胶树脂载体上,SA-ILs催化剂具有优异的酸性和良好的结构稳定性。当离子液体为最佳载量11%时,合成的SA-ILs催化剂酸密度达3.25 mmol·g^-1,对乙酸和乙醇之间的酯化反应具有良好的催化性能,乙酸乙酯的收率可达81%,并且循环复用5次使用后催化性能没有明显下降,而其较低的活化能是催化酯化反应更易进行的关键。

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	谢平
	钟天浩
	邵毓霖
	李涛
	鲁宜武
	于英民
	赵青山
	李忠涛

关键词：凝胶树脂离子液体固体酸酯化反应

Abstract： To solve the problem that the conventional concentrated sulfuric acid catalyst for esterification reactions are prone to corrosion and generate large amounts of acid-containing wastewater, highly efficient gel resin-loaded ionic liquid solid acid (SA-ILs) catalysts were prepared by a one-pot method of loading ionic liquids onto gel resins. It is shown that the gel resin carrier has a strong water-absorbing structure, and the ionic liquids are covalently loaded on the gel resin carrier through chemical bonding, leading to SA-ILs catalysts with excellent acidity and good structural stability. With an optimal ionic liquid loading of 11% and acid density of 3.25 mmol·g^-1, the synthesized SA-ILs catalyst showed good catalytic performance for the transesterification reaction between acetic acid and ethanol, achieving a yield of 81% of ethyl acetate. The catalyst also showed slightly decrease of the catalytic performance after reused for five cycles. The lower activation energy of the catalyst is proved to be the key to facilitate the catalytic transesterification reaction.

Keywords： gel resin ionic liquid solid acid esterification reaction

Received 2023-05-19;

Fund:山东省国家自然科学基金资助项目(ZR2020JQ21, ZR2021ZD24);国家自然科学基金项目(51873231, 22138013);泰山学者项目(tsqn201909062); 山东能源集团有限公司技术基金(J2020004)。

Corresponding Authors: 李忠涛,教授,E-mail:liztao@upc.edu.cn;赵青山,副教授,E-mail: qszhao@upc.edu.cn。 Email: liztao@upc.edu.cn;qszhao@upc.edu.cn

About author: 谢平(1998-),男,硕士研究生,从事固体酸催化酯化反应研究;钟天浩(1997-),男,硕士研究生,从事固体酸催化酯化反应研究。

引用本文:

谢平, 钟天浩, 邵毓霖, 李涛, 鲁宜武, 于英民, 赵青山, 李忠涛.凝胶树脂负载离子液体固体酸催化酯化反应性能[J]. 化学工业与工程, 2024,41(3): 77-85

XIE Ping, ZHONG Tianhao, SHAO Yuling, LI Tao, LU Yiwu, YU Yingmin, ZHAO Qingshan, LI Zhongtao.Gel resin supported ionic liquids as solid acids for esterification reaction[J]. Chemcial Industry and Engineering, 2024,41(3): 77-85

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