原料配比对水热体系合成A/X复合沸石的影响

Influence of the ratio of raw material on Synthesizing of Composite A/X Zeolites by Hydrothermal Method

摘要:

无模板剂条件下，采用水热体系合成出A/X复合沸石。用XRD粉末衍射法研究了原料配比（硅铝比、水钠比及钠硅比）对合成A/X复合沸石的影响，表明A/X复合沸石在较窄范围内生成。TEM照片显示合成样品分散性好。A/X复合沸石的钙离子交换值达到与4A沸石同水平，镁离子交换值远远高于4A沸石，且随X型沸石含量的升高而增大。

Abstract:

The composite zeolites A/X was synthesized by hydrothermal method from one synthesis gel without template. The effects of the ratio of raw material(SiO2:Al2O3、H2O:Na2O、Na2O:SiO2)on the synthesis of composite zeolite A/X were studied by means of X-ray diffraction, the results showed that the zeolites A and X were co-crystallized in a narrow range. TEM analyses indicated that the as-synthesized composite zeolite dispersal well. The calcium ion exchange capacity of the composite zeolites A/X was quite high as zeolite 4A, the magnesium ion exchange capacity of the products was much better than 4A zeolite and the ion exchange capacity for magnesium was increase with increasing content of zeolite X.