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Ammoxidation of 3‐picoline to nicotinonitrile over vanadium phosphorus oxide‐based catalysts
Author(s) -
Manohar Basude,
Reddy Benjaram M.
Publication year - 1998
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/(sici)1097-4660(199802)71:2<141::aid-jctb822>3.0.co;2-e
Subject(s) - ammoxidation , catalysis , vanadium , inorganic chemistry , vanadium oxide , picoline , chemistry , chemisorption , bet theory , materials science , acrylonitrile , organic chemistry , pyridine , copolymer , polymer
Ammoxidation of 3‐picoline to nicotinonitrile was investigated on vanadium phosphorus oxide (VPO), VPO/SiO 2 and additive atom (Cu, Zr, Mn and Co) incorporated VPO catalysts under atmospheric pressure and at 673 K. For the purpose of comparison a conventional V 2 O 5 –MoO 3 /Al 2 O 3 catalyst was also studied under identical conditions. These catalysts were characterized by means of X‐ray diffraction, electron spin resonance, infrared, ammonia chemisorption and BET surface area methods. The VPO‐based catalysts show better performance than the V 2 O 5 –MoO 3 /Al 2 O 3 catalyst. Further, the VPO/SiO 2 and VPO catalysts exhibit better conversion and product selectivities than the additive‐containing VPO catalysts. Better activity of VPO and VPO/SiO 2 catalysts was related to their high active surface area, higher surface acidity and lower oxidation state of vanadium. The redox couple between (VO) 2 P 2 O 7 (V 4+ ) and α I ‐VOPO 4 (V 5+ ) phases appears to be responsible for the ammoxidation activity of VPO catalysts. © 1998 SCI.