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条形TRBS-1催化剂的主要组成为Silicalite-1分子筛,该分子筛属于具有MFI拓扑学结构的无铝全硅分子筛,是ZSM-5型结构分子筛家族中组成最简单的一种分子筛,其骨架仅含有硅原子和氧原子,基本结构单元为SiO4四面体。本文制备了条形TRBS-1催化剂用于环己酮肟气相Beckmann重排反应生产ε-己内酰胺。运用XRD、N2吸附-脱附、TEM等技术,对条形TRBS-1催化剂进行了表征。结果显示,条形TRBS-1催化剂具有MFI结构特征;BET比表面积达到360m2/g,非微孔比表面积为30m2/g,孔体积和微孔体积分别为0.48mL/g和0.15mL/g,N2吸附-脱附等温线在p/p0=0.45～0.98范围存在滞后环;条形TRBS-1催化剂的颗粒尺寸为200～300nm,大小均匀,其表面存在大量20～50nm小颗粒的黏结剂。环己酮肟在条形TRBS-1催化剂上的气相Beckmann重排反应具有很高的环己酮肟转化率和ε-己内酰胺选择性,且催化剂稳定性和再生性能良好。
The main component of the bar-shaped TRBS-1 catalyst is Silicalite-1 molecular sieve, which belongs to the all-aluminum molecular sieve with MFI topology and is the simplest molecular sieve of ZSM-5 type molecular sieve family. Contains silicon atoms and oxygen atoms, the basic structural unit of SiO4 tetrahedron. In this paper, a strip-shaped TRBS-1 catalyst was prepared for the gas-phase Beckmann rearrangement of cyclohexanone oxime to produce ε-caprolactam. The strip-shaped TRBS-1 catalyst was characterized by XRD, N2 adsorption-desorption and TEM. The results showed that the bar-shaped TRBS-1 catalyst possessed the MFI structure characteristics. The BET specific surface area reached 360m2 / g, the non-microporous surface area was 30m2 / g, the pore volume and micropore volume were 0.48mL / g and 0.15mL / The N2 adsorption-desorption isotherm has a hysteresis loop in the range of p / p0 = 0.45-0.98. The particle size of the stripe-shaped TRBS-1 catalyst is 200-300 nm with uniform size and a large amount of binder with small particles of 20-50 nm exists on the surface. The gas phase Beckmann rearrangement reaction of cyclohexanone oxime on the stripe TRBS-1 catalyst has high cyclohexanone oxime conversion and ε-caprolactam selectivity, and the catalyst has good stability and regeneration performance.