硅铝层柱累托土的表征

以钠基累托土为原料，制备了硅铝层柱累托土，并采用XRD、NH₃-TPD、吡啶红外和BET进行了表征。结果表明，合成的材料主要以中强酸为主，有较强的L酸，没有B酸，Al与累托土最佳比例为6 mmol·g^-1。硅铝层柱累托土中除含有低于2 nm的微孔外，还含有大量（2~4） nm中孔,最可几孔径为（3.3~4.3） nm;硅铝层柱累托土微孔最可几孔径为0.5 nm，比较集中，硅、铝在片层间均匀分布。

Characterization of Si-Al-rectorite

Si-Al-Rectorite was synthesized using sodium rectorite as the raw material and characterized by XRD, NH3-TPD, pyridine adsorbed IR and BET. The results indicated that Si-Al-rectorite with the optimal ratio of Al to rectorite 6 mmol · g-1 mainly had mid-strong acid and strong Lewis acid without Brcnsted acid. Si-Al-Rectorite possessed not only lots of mesopores with （2 -4） nm pore diameter, but also micro- pores with pore diameter less than 2 nm. The most probable aperture distribution of mesoporous materials and microporous materials were （ 3.3 - 4.3 ） nm and 0.5 nm, respectively. The distribution of silicon and aluminium in Si-Al-rectorites layers was uniform.