摘要
在极低的n（H2O）／n（SiO2）条件下成功地合成了纯相、高结晶度的MCM-22分子筛。具体的合成条件为：n（HMI）／n（SiO2）为0．08～0．6，n（H2O）／n（SiO2）为5～10，n（SiO2）／n（Al2O3）为30～80。该合成体系为典型的极浓体系。与n（H2O）／n（SiO2）=35条件下合成的MCM-22分子筛相比，低n（H2O）／n（SiO2）极浓体系条件下合成的MCM-22分子筛具有更高的结晶度，且其比表面积和孔容均有所增加。极浓体系下合成的MCM-22分子筛大大降低了HMI和NaOH的用量，这不仅有利于降低MCM-22的合成成本，而且可减少对环境的污染。
Zeolite MCM-22 with pure phase and good crystallinity was prepared successfully under low n（H2O）/ n（SiO2 ）. The typical crystallization conditions were n（HMI）/n（SiO2） of 0.08-0. 6, n（H2O）/n（SiO2 ）of 5-10, n（SiO2）/n（Al2O3 ） of 30-80, with which the synthesis system was called the extremely dense system. Zeolite MCM-22 obtained from this system had higher crystallinity than those prepared under high n（H2O）/n （SiO2） （n（H2 O）/n（SiO2 ） = 35）. Correspondingly, its BET surface area and micropore volume increased. In this method the consumption of HMI and NaOH could be effectively decreased, which was beneficial to the reduction of synthesis cost and the protection of environment.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2006年第B10期103-106,共4页
Acta Petrolei Sinica(Petroleum Processing Section)
