Preparation of tantalum-pillared magadiite and its catalytic performance in Beckmann rearrangement |
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Authors: | Sun Jin Kim Myung Hun Kim Gon Seo Young Sun Uh |
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Institution: | (1) Nano-Materials Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 136-791, Korea;(2) Department of Chemical Technology, Chonnam National University, Kwangju, 500-757, Korea |
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Abstract: | Vapor phase Beckmann rearrangement of cyclohexanone oxime to ε-caprolactam has been carried out using tantalum-pillared magadiites
(Ta-magadiites) with different surface areas as catalysts. The Ta-magadiite catalysts of relatively large surface areas showed
high catalytic activities, due to a large number of active sites. For the Ta-magadiite catalyst of the largest surface area,
the oxime conversion reached 99.1%, with 97.5% of lactam selectivity. FT-IR and NH3-TPD results demonstrated that the new hydroxyl groups and a large amount of acidic sites generated by Ta pillaring into the
magadiite interlayer were responsible for the high catalytic performance of Ta-magadiite catalyst. |
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