Abstract: This paper reports a high silicon submicron molecular sieve with MFI structure. The molecular sieve preparation process is simple，low-cost and environment friendly. The vapor phase Beckmann rearrangement catalytic effect of MS1 zeolite catalytic cyclohexanone oxime(CHO) to caprolactam has been studied. The influences of vaporization temperature，reaction temperature，CHO concentration and WHSV of CHO on the vapor phase Beckmann rearrangement of CHO were investigated. 99.5% of the cyclohexanone oxime conversion rate and 95% of the caprolactam were achieved with better catalyst stability. The results show that MS1 zeolite catalyst has a good potential in industrial application.

Key words: caprolactam, cyclohexanone oxime, Beckmann-rearrangement, MFI Si-molecular sieve

摘要： 报道了一种具有MFI结构的高硅亚微米级分子筛MS1，该分子筛制备工艺简便、成本低、环境友好。研究了MS1分子筛催化环己酮肟气相Beckmann重排制备己内酰胺的催化效果，考察了汽化温度、反应温度、环己酮肟浓度及质量空速（WHSV）等反应条件对环己酮肟气相Beckmann重排反应的影响；在优化的反应条件下环己酮肟转化率≥99.5%，己内酰胺选择性达95%，且催化剂稳定性较好；结果表明，MS1分子筛催化剂具有良好的工业化应用前景。

关键词: 己内酰胺, 环己酮肟, Beckmann重排, MFI硅分子筛