摘要
以氟化钠为矿化剂、六亚甲基亚胺为模板剂，在静态水热条件下考察了静态老化、动态老化及超声老化对合成MCM-22分子筛的影响．实验结果表明，三种老化方式对合成MCM-22分子筛均有促进作用，其中超声老化的促进作用最明显．采用超声老化的方法，在氟化物体系中使MCM-22分子筛可合成SiO2／Al2O3摩尔比范围扩大到20～100，合成时间缩短到48～62h，同时分子筛的形貌发生了改变．
Zeolite MCM-22 was synthesized hydrothermally under static conditions using NaF and hexamethyleneimine as the mineralizing agent and template, respectively. The effects of aging processes （static aging, stirred aging, and ultrasonic aging） on the synthesis of zeolite MCM-22 were investigated. All the above aging treatment methods accelerated the formation of MCM-22, and the ultrasonic aging showed the best effect. The aging treatment with ultrasound noticeably broadened the range of SiO2/Al2O3 molar ratio （the SiO2/Al2O3 molar ratio of the final gel was 20-100）, shortened the crystallization time to 48N62 h, and changed the morphology of MCM-22 in the fluoride system.
出处
《催化学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第7期585-590,共6页
基金
国家自然科学基金资助项目(20233030).
