Abstract
A series of heteropoly acid bisalts of N-octyl ethoxylated octadecylamine with high acid strength and excellent emulsifying capacity have been prepared via the partial replacement of protons in neat phosphotungstic acid. These ionic liquids exhibit good activity and selectivity in the hydration of α-pinene, even in the absence of a co-catalyst such as chloroacetic acid. The “excellent emulsifying capacity at the reaction temperature and the liquid–liquid separation at room temperature” for the obtained organic heteropolyacid bisalts catalysts enable their easy recovery and reusability, as demonstrated by a six-run recycling test.
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Acknowledgments
The financial support provided for this research by the National Science Foundation of China (31470595, 31270615 and 21106074), Opening Foundation of Beijing National Laboratory for Molecular Sciences (20140141), and “The Taishan Scholar Program of Shandong” is gratefully acknowledged.
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Yuan, B., Zhong, H., Liu, P. et al. Heteropolyacid Bisalt of N-octyl Ethoxylated Octadecylamine: An Efficient and Reusable Catalyst for Carboxylic Acid-Free Hydration of α-Pinene. Catal Lett 146, 929–936 (2016). https://doi.org/10.1007/s10562-016-1709-6
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DOI: https://doi.org/10.1007/s10562-016-1709-6