Vapor phase Beckmann rearrangement of cyclohexanone oxime over different ferrierite zeolite catalysts

被引:20
作者
Anand, R
Khomane, RB
Rao, BS
Kulkarni, BD [1 ]
机构
[1] Natl Chem Lab, Div Chem Engn, Pune 411008, Maharashtra, India
[2] Natl Chem Lab, Catalysis Div, Pune 411008, Maharashtra, India
关键词
ferrierite; cyclohexanone oxime; Beckmann rearrangement; TPD; acetonitrile;
D O I
10.1023/A:1014949100543
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Ferrierite zeolite catalysts prepared using different procedures have been tested for their activity for vapor phase Beckmann rearrangement of cyclohexanone oxime to c-caprolactam. We report here the results of a study seeking the influence of temperature, nitrogen feed rate, oxime concentration and solvents on the catalyst performance. At low concentration of oxime (2.5 wt%), using acetonitrile as solvent the maximum in the conversion of oxime and selectivity to c-caprolactam has been obtained. The presence of weak, medium and strong acid sites as indicated by temperature-programmed desorption of NH3 corroborates well with the catalytic activities of various ferrierites shown here. Solvent polarity is found to significantly affect the conversion of cyclohexanone oxime.
引用
收藏
页码:189 / 194
页数:6
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