Preparation of Ru-[bmim]BF4 Catalyst Using NaBH4 as Reducing Agent and Its Performance in Selective Hydrogenation of Benzene

doi:10.1016/S1872-2067(11)60469-5

Abstract

Abstract: A Ru-[bmim]BF₄ catalyst was prepared in a mixture of the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim]BF₄) and H₂O using NaBH₄ as a reducing agent. The Ru-[bmim]BF₄ catalyst showed higher selectivity for cyclohexene than a catalyst reduced by N₂H₄·H₂O because of the influence of boron. When Ru-[bmim]BF₄ was reused, higher activity and lower selectivity were obtained because the number of Ru active sites increased through leaching of the ionic liquid. The used catalyst also contained ZnOHF formed in the reaction between F^– and ZnSO₄, which was an additive in the reaction. Under the influence of the ionic liquid as a template, ZnOHF grew along the (001) direction and exhibited rod-like morphology.

Key words: ruthenium, 1-butyl-3-methylimidazolium tetrafluoroborate, sodium borohydride, zinc hydroxyfluoride, benzene, selective hydrogenation

XUE Wei, QIN Yan-Fei, LI Fang, WANG Yan-Ji, WANG Zhi-Miao. Preparation of Ru-[bmim]BF4 Catalyst Using NaBH4 as Reducing Agent and Its Performance in Selective Hydrogenation of Benzene[J]. Chinese Journal of Catalysis, 2012, 33(12): 1913-1918.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(11)60469-5

https://www.cjcatal.com/EN/Y2012/V33/I12/1913

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Preparation of Ru-[bmim]BF4 Catalyst Using NaBH4 as Reducing Agent and Its Performance in Selective Hydrogenation of Benzene

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