Citation: Li Yamei, Zhao Yujun, Wang Shengping, Ma Xinbin. Silica supported potassium oxide catalyst for dehydration of 2-picolinamide to form 2-cyanopyridine[J]. Chinese Chemical Letters, ;2019, 30(2): 494-498. doi: 10.1016/j.cclet.2018.04.012 shu

Silica supported potassium oxide catalyst for dehydration of 2-picolinamide to form 2-cyanopyridine

Key Laboratory for Green Chemical Technology, School of Chemical Engineering and Technology, Tianjin University, Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), Tianjin 300072, China

spwang@tju.edu.cn

Received Date: 6 March 2018
Revised Date: 8 April 2018
Accepted Date: 13 April 2018
Available Online: 13 February 2018

Figures(6)

The dehydration of 2-picolinamide to produce 2-cyanopyridine was investigated thoroughly using silica supported potassium oxide as a heterogeneous catalyst. Both large specific surface area and pore size of SiO₂ (B) contributed to the favorable catalytic performance for the synthesis of 2-CP. In addition, the yield of 2-CP showed the linear relationship with the amounts of medium basicity of the catalysts, demonstrating that medium basic sites were the active sites of silica supported potassium oxide catalysts. The catalysts were further characterized by XRD and FT-IR to clarify the active species. The results indicated the Si-O-K group produced by the reaction of K₂CO₃ with Si-OH was the active species, which was further evidenced by the adjustment of the amount of Si-OH by silylation and hydroxylation procedure.
- 2-Picolinamide,
- 2-Cyanopyridine,
- Dehydration,
- Potassium oxide
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