Zeolite syntheses from superalkaline reaction mixtures
Zeolite syntheses from superalkaline reaction mixtures
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从超碱性反应混合物合成沸石
DOI：
10.1135/cccc19920788
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发表时间：
1992
影响因子：
--
通讯作者：
G. Fiedrich
中科院分区：
文献类型：
--
作者：
F. Fischer;M. Hadan;G. Fiedrich
介绍了由超碱性反应混合物合成八面沸石的方法。在H2O/（K2 O + Na 2 O）= 13 ~ 15的Na 2 O-Al 2 O3-SiO2-H2O体系中，K2 O组分的加入对体系的影响很大。在K2 O/（K2 O + Na 2 O）为0.07 ~ 0.5的范围内考察了反应过程.在所使用的条件下，分离八面沸石型沸石作为单晶相是完全可能的。红外光谱表明八面沸石骨架中SiO2/Al 2 O3比值较低，在2.0 ~ 2.1之间。低的SiO2/Al 2 O3比解释为随着羟基离子浓度的增加，Si-O-Al-键的稳定性高于Si-O-Si-键。
The synthesis of faujasite-type zeolite from superalkaline reaction mixtures are described. The contribution shows the influence of component K 2 O added in the system Na 2 O-Al 2 O 3 -SiO 2 -H 2 O with H 2 O/(K 2 O + Na 2 O) = 13-15. The reaction course was investigated in the range K 2 O/(K 2 O + Na 2 O) from about 0.07 to 0.5. Under used conditions it is quite possible to isolate faujasite-type zeolite as a single crystalline phase. By means of IR spectroscopy, low SiO 2 /Al 2 O 3 ratios from 2.0 to 2.1 in the faujasite framework have been indicated. The low SiO 2 /Al 2 O 3 ratios are interpreted by a higher stability of the Si-O-Al- than the Si-O-Si- bond with increasing hydroxyl ion concentration.