Preparation of NbOx/SiO2-coated structured packing material and it's catalytic performance in the gas-phase Beckmann rearrangement of cyclohexanone oxime to ε-caprolactam

2017 ◽  
Vol 90 ◽  
pp. 23-26 ◽  
Author(s):  
Marius M. Maronna ◽  
Edgar C. Kruissink ◽  
Rudy F. Parton ◽  
Johan T. Tinge ◽  
Wolfgang F. Hoelderich
Keyword(s):  
Gas Phase ◽  
Catalytic Performance ◽  
Beckmann Rearrangement ◽  
Packing Material ◽  
Cyclohexanone Oxime ◽  
Structured Packing

Gas phase beckmann rearrangement of cyclohexanone oxime over zirconia-supported boria catalyst

1999 ◽  
Vol 188 (1-2) ◽  
pp. 361-368 ◽  
Author(s):  
Bo-Qing Xu ◽  
Shi-Biao Cheng ◽  
Shan Jiang ◽  
Qi-Ming Zhu
Keyword(s):  
Gas Phase ◽  
Beckmann Rearrangement ◽  
Cyclohexanone Oxime

Synthesis and Catalytic Application of Mesoporous Molecular Sieves MCM-41 Containing Niobium and Tantalum

2007 ◽  
Vol 124-126 ◽  
pp. 1761-1764 ◽  
Author(s):  
Hun Jung ◽  
Kwang Deog Jung ◽  
Oh Shim Joo ◽  
Sun Jin Kim
Keyword(s):  
Vapor Phase ◽  
Molecular Sieves ◽  
Catalytic Performance ◽  
Acid Sites ◽  
Weak Acid ◽  
Beckmann Rearrangement ◽  
Mesoporous Molecular Sieves ◽  
Cyclohexanone Oxime ◽  
Catalytic Application ◽  
Mcm 41

Niobium- and tantalum-containing mesoporous molecular sieves MCM-41 have been synthesized, and applied as a catalyst for vapor phase Beckmann rearrangement of cyclohexanone oxime to ε-caprolactam. NbMCM-41 catalyst exhibited high catalytic performance in the vapor phase Beckmann rearrangement of cyclohexanone oxime. The oxime conversions were almost 100% and the lactam selectivities were around 80%. The lactam selectivities of NbMCM-41 catalyst were higher than those of AlMCM-41 catalyst. However, TaMCM-41 catalyst exhibited lower catalytic performance than AlMCM-41 catalyst, and it was fast deactivated with time. These results may be due to the acidity difference among the catalysts. The results from NH3-TPD showed that NbMCM-41 catalyst possessed weak and medium acid sites, while TaMCM-41 catalyst possessed only very weak acid sites. AlMCM-41 catalyst also exhibited only weak acid sites.

Kinetic Study on Gas-Phase Beckmann Rearrangement of Cyclohexanone Oxime to ε-Caprolactam over a Silica-Supported Niobia Catalyst

2016 ◽  
Vol 55 (5) ◽  
pp. 1202-1214 ◽  
Author(s):  
M. M. Maronna ◽  
E. C. Kruissink ◽  
J. T. Tinge ◽  
D. W. Agar ◽  
W. F. Hoelderich
Keyword(s):  
Kinetic Study ◽  
Gas Phase ◽  
Beckmann Rearrangement ◽  
Cyclohexanone Oxime

scholarly journals Spectroscopic study on the active site of a SiO2 supported niobia catalyst used for the gas-phase Beckmann rearrangement of cyclohexanone oxime to ε-caprolactam

2016 ◽  
Vol 18 (32) ◽  
pp. 22636-22646 ◽  
Author(s):  
M. M. Maronna ◽  
E. C. Kruissink ◽  
R. F. Parton ◽  
F. Soulimani ◽  
B. M. Weckhuysen ◽  
...  
Keyword(s):  
Spectroscopic Study ◽  
Gas Phase ◽  
Active Site ◽  
Beckmann Rearrangement ◽  
Cyclohexanone Oxime ◽  
Surface Species ◽  
Acidic Site

Formation of a Brønsted-acidic site out of a Lewis-acidic mono-oxo NbO4 surface species and ethanol, catalysed by a Lewis-basic molecule, e.g. pyridine or cyclohexanone oxime.

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