Ammoxidation of 3-picoline to nicotinonitrile over vanadium phosphorus oxide-based catalysts
✍ Scribed by Basude Manohar; Benjaram M. Reddy
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1998
- Tongue
- English
- Weight
- 253 KB
- Volume
- 71
- Category
- Article
- ISSN
- 0268-2575
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✦ Synopsis
Ammoxidation of 3-picoline to nicotinonitrile was investigated on vanadium phosphorus oxide (VPO), and additive atom (Cu, Zr, Mn VPO/SiO 2 and Co) incorporated VPO catalysts under atmospheric pressure and at 673 K. For the purpose of comparison a conventional catalyst was V 2 O 5 ÈMoO 3 /Al 2 O 3 also studied under identical conditions. These catalysts were characterized by means of X-ray di †raction, electron spin resonance, infrared, ammonia chemisorption and BET surface area methods. The VPO-based catalysts show better performance than the catalyst. Further, the and V 2 O 5 ÈMoO 3 /Al 2 O 3 VPO/SiO 2 VPO catalysts exhibit better conversion and product selectivities than the additive-containing VPO catalysts. Better activity of VPO and cata-VPO/SiO 2 lysts was related to their high active surface area, higher surface acidity and lower oxidation state of vanadium. The redox couple between (V4) (VO) 2 P 2 O 7 and (V5) phases appears to be responsible for the ammoxidation a I -VOPO 4 activity of VPO catalysts. 1998 SCI.