preparation of tantalum-pillared magadiite and its catalytic performance in Beckmann rearrangement

Title
preparation of tantalum-pillared magadiite and its catalytic performance in Beckmann rearrangement
Authors
김선진김명훈서곤어용선
Keywords
Beckmann rearrangement; Caprolactam; Tantalum; Magadiite; Pillaring
Issue Date
2012-04
Publisher
Research on chemical intermediates
Citation
VOL 38, NO 6, 1181-1190
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.
URI
http://pubs.kist.re.kr/handle/201004/44081
ISSN
09226168
Appears in Collections:
KIST Publication > Article
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