晶化母液介质中制备多级孔TS-1分子筛

将微孔TS-1分子筛晶化过程中产生的母液回收处理后用于多级孔TS-1分子筛制备,考察回收母液作为介质的体系中,模板剂碱体系和碱浓度等因素对多级孔TS-1制备的影响。结果表明:所制备的多级孔TS-1分子筛在保留 MFI结构的同时,产生了较多的介孔,使其在环己酮氨肟化反应中显示出更好的催化性能,在较低的催化剂浓度下(1.6 g/L),环己酮转化率为94%,环己酮肟选择性为99%;将回收晶化母液用于多级孔TS-1分子筛的制备,降低了纯水用量,减少了废液排放,符合绿色化学的发展要求。

PREPARATION OF HIERARCHICAL TS-1 IN RECYCLED MOTHER LIQUID

The mother liquid of microporous TS-1 crystallization process was recycled and used as the medium for the preparation of hierarchical TS-1 zeolites. In the system of recycled mother liquid as medium, the effects of the template agent and alkali on the preparation of hierarchical TS-1 were investigated, respectively. The results showed that while retaining the MFI structure, the prepared hierarchical TS-1 formed more mesoporous pores and exhibited superior catalytic activity in the cyclohexanone ammoximation. At a lower catalyst concentration (1.6 g/L), the cyclohexanone conversion rate was 94% and the cyclohexanone-oxime selectivity was 99%. The recycled mother liquid reduced the consumption of water and the discharge of waste liquid, and agreed with the development requirements of green chemistry.