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Syntheses of Sulfonic Acid Functionalized Ionic Liquid-Like Tungstophosphate and Their Catalytic Performance in Synthesis of Ethylene Glycol Monoether Acetate(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2013年02期
Page:
43-47
Research Field:
化学
Publishing date:

Info

Title:
Syntheses of Sulfonic Acid Functionalized Ionic Liquid-Like Tungstophosphate and Their Catalytic Performance in Synthesis of Ethylene Glycol Monoether Acetate
Author(s):
Li Yuanyuan; Fang Rui; Yang Chun
School of Chemistry and Materials Science,Nanjing Normal University,Nanjing 210097,China
Keywords:
tungstophosphate; ionic liquid; synthesis and characterization; catalysis; esterification
PACS:
O643.3
DOI:
-
Abstract:
Sulfonic acid functionalized ionic liquid-like tungstophosphate catalysts,[PyPS]nH3-nPW12O40·xH2O(n=1,2,3),were synthesized using pyridine,1,3-propanesultone and tungstophosphoric acid with Keggin structure as starting materials.The structures,compositions and properties of the catalysts were characterized by IR,UV-vis,melting-point measurement,1H NMR,elementary analyses and TG-DTA techniques.Furthermore,these catalysts were employed in esterification of acetic acid with ethylene glycol monoethyl ether.The catalytic performance and the recycle of the catalysts were investigated.It was showed that these catalysts possessed high activity and 100% selectivity for the esterification,and a reaction-controlled phase-transfer could be realized in the reaction,so that the catalysts could be easily separated and reused.After being recycled for 6 times,the conversion of ethylene glycol monoethyl ether could reach 80% yet,indicating that these catalysts are highly efficient and environmentally benign.

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Last Update: 2013-06-30