ZSM-5分子筛生成中的模板效应Ⅵ.常用模板剂模板指数的测定

TEMPLATING EFFECT IN THE FORMATION OF ZSM-5 MOLECULAR SIEVE Ⅵ. DETERMINATION OF THE TEMPLATING INDEX FOR COMMON TEMPLATING AGENTS

在定义模板指数概念的基础上,测定了7种常用模板剂的模板指数,并对模板指数表征模板效应强弱的可信性给以验证。结果表明模板指数所表示的模板剂的模板效应的强弱次序与实验结果一致,也与前人工作的定性结果一致。从而提出了用简单方法定量评价和选择ZSM-5分子筛模板剂的新途径。

On the basis of defining a templating index K_t=λ(STA/TPA^+), where STA/TPA^+ represents the molar ratio of a secondary templating agent(STA) to tetrapropylammonium cation TPA^+,λ represents the ratio of the bond length of STA to the bond length of,TPA^+. The templating indexes for seven common templating agents (amines and alcohols) in the formation of ZSM-5 molecular sieve were determined. It is shown through synthesis experiments that the templating index can quantitatively describe the effect of templating agents.