在极浓体系中合成中孔(MESOPOROUS)Si-MCM-41分子筛及其性质

SYNTHESIS AND PROPERTIES OF MESOPOROUS MOLECULAR SIEVE MCM41 FORM EXTREMELY DENSE SYSTEM

由无定形凝胶体系Ｎａ２Ｏ－ＳｉＯ２－ＣＴＡＢ（十六烷基三甲基溴化铵）－Ｈ２Ｏ，在控制Ｈ２Ｏ／Ｓｉ≤５．０的极浓条件下，研究了Ｓｉ－ＭＣＭ－４１分子筛的合成条件。在Ｈ２Ｏ／Ｓｉ＝１．０－５．０，ＣＴＡＢ／Ｓｉ＝０．０１２５－０．１２５；Ｎａ／Ｓｉ＝０．０５－０．１５时，均可合成Ｓｉ－ＭＣＭ－４１分子筛。该体系特点是ＣＴＡＢ消耗明显降低。ＸＲＤ、ＳＥＭ、ＴＧ－ＤＴＡ和Ｎ２吸附性质表征了合成的ＭＣＭ－４１分子筛，证明本法合成产物具有典型的ＭＣＭ－４１分子筛特性。

? In extremely dense system controlling H 2O/Si≤5 from amorphous gel Na 2OSiO 2CTAB (cetyltrimethylammonium bromite)H 2O, the synthesis conditions of mesoporous molecular sieve SiMCM41 have been studied. Molecular sieve SiMCM41 have been prepared in H 2O/Si=1.05.0, CTAB/Si=0.01250.125, Na/Si=0.05-0.15. The characteristic of the method is clearly decreasing consumption amount of CTAB. Assynthesized samples have been characterized by XRD, SEM, TGDTA and N 2 adsorption isothermals. These demonstrated that products possess typical properties of molecular sieve MCM41.