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晶化母液介质中制备多级孔TS-1分子筛
PREPARATION OF HIERARCHICAL TS-1 IN RECYCLED MOTHER LIQUID
【摘要】 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。
【Abstract】 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.
【Key words】 recycled mother liquid; TS-1 zeolite; hierarchical pores; cyclohexanone ammoximation;
- 【文献出处】 石油炼制与化工 ,Petroleum Processing and Petrochemicals , 编辑部邮箱 ,2019年06期
- 【分类号】O643.36
- 【被引频次】1
- 【下载频次】182