环己酮肟在RBS-1催化剂上的气相Beckmann重排反应

VAPOR PHASE BECKMANN REARRANGEMENT OF CYCLOHEXANONE OXIME OVER RBS-1 CATALYST

研究了370℃时环己酮肟在RBS-1催化剂上转化为己内酰胺的气相Beckmann重排反应。结果表明,该反应具有很高的环己酮肟转化率(99.5％以上)和ε-己内酰胺选择性(95％左右),且催化剂具有良好的稳定性。RBS-1催化剂具有MFI结构特征,BET比表面积达460 m^2/g,外比表面积达60 m^2/g,N_2吸脱附在分压比为0.45～0.98范围存在滞后环,显示中孔结构特征。

The vapor phase Beckmann Rearrangement of cyclohexanone oxime (CHO) to cap-rolactam (CPL) has been studied over RBS-1 catalyst with MFI-type structure at 370℃. The results in-dicated that the catalyst exhibited high CHO conversion (99.9％), high CPL selectivity (95％) and goodreaction time-on-stream. The catalyst with high specific surface area (460m^2/g) and high micropore spe-cific surface area (60m^2/g) showed the hysteresis loop at a P/P_0 range of 0.45—0.98 over nitrogen ad-sorption/desorption isothems, being characteristic of well-developed mesoporous texture.