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Attempts to Synthesize Zeolitic Composites from Stellerite

机译:尝试从恒辉石合成沸石复合材料

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摘要

A feasible method to synthesize NaA and NaY zeolite from stellerite, the very cheap raw material found in China, was reported in this article to reduce the cost of zeolite synthesis for the first time. After stellerite is calcined above 973 K with sodium carbonate, this natural zeolite can be slowly dissolved in alkali solution and partly forms the gels, then transforms to zeolite NaA or NaY by structural rearrangement. The effect of synthetic conditions such as the ratio of different cation used in the reactive mixture on the resulting zeolite is examined. Furthermore, a new NaA/MCM-41 composite possessing both micropore and mesopore is synthesized by adding the NaA zeolite into the synthetic system, and the impact of zeolite additive on the pore structure of final porous composite is also explored.
机译:本文报道了一种可行的方法,该方法可从恒星石(一种在中国发现的非常便宜的原料)合成NaA和NaY沸石的方法,从而首次降低了沸石的合成成本。在用碳酸钠将钟盘石煅烧至973 K以上后,可以将这种天然沸石缓慢溶于碱溶液并部分形成凝胶,然后通过结构重排转化为NaA或NaY沸石。检查了合成条件,例如反应性混合物中使用的不同阳离子的比例对所得沸石的影响。此外,通过在合成体系中加入NaA沸石,合成了同时具有微孔和中孔的新型NaA / MCM-41复合材料,并探讨了沸石添加剂对最终多孔复合材料孔结构的影响。

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