B_2O_3/ZrO_2催化剂在气相环己酮肟重排反应中的稳定性和再生性能

Stability and Regenerability of B_2O_3/ZrO_2 Catalyst for Gas-Phase Beckmann Rearrangement of Cyclohexanone-Oxime

Zirconia with high surface area (247 m 2/g) obtained by digesting sol gel of hydrous zirconia was used as a carrier of the B 2O 3/ZrO 2 catalyst for the gas phase Beckmann rearrangement of cyclohexanone oxime to form caprolactam. Effects of boria loading and activation calcination temperature on the catalyst performance were investigated. The optimization of the boria loading and the calcination temperature leads to a highly stable and regenerable B 2O 3/ZrO 2 catalyst for the rearrangement reaction. When the boria loading is 26 9% and the catalyst is calcined at 600 ℃, the B 2O 3/ZrO 2 shows the best performance, and it has been one of the best solid catalysts for the gas phase Beckmann rearrangement so far.

Zirconia with high surface area (247 m(2)/g) obtained by digesting sol gel of hydrous zirconia was used as a carrier of the B2O3/ZrO2 catalyst for the gas-phase Beckmann rearrangement of cyclohexanoneoxime to form caprolactam. Effects of boria loading and activation calcination temperature on the catalyst performance were investigated. The optimization of the boria loading and the calcination temperature leads to a highly stable and regenerable B2O3/ZrO2 catalyst for the rearrangement reaction. When the boria loading is 26.9% and the catalyst is calcined at 600 degreesC, the B2O3/ZrO2 shows the best performance, and it has been one of the best solid catalysts for the gas-phase Beckmann rearrangement so far.