Abstract

Approaches to the development of submicron and nanocrystalline silicate materials of MFI structure in a fluorinated surfactant medium were studied with perfluorononanoic acid as an example. In fluorinated surfactants, the crystal structure of the zeolite framework is formed more slowly than in the case of silicalite-1 because of the presence of aluminum atoms. The fractions of the formed Brønsted and Lewis acid sites in zeolites are independent of the amount of aluminum introduced into the reaction mixture. In oligomerization of light alkenes, the activity and operation stability of the synthesized zeolite with lower concentration of Brønsted acid sites and smaller crystal size are similar to those of the commercially available catalyst.

中文翻译：

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MFI结构的纳米晶材料：含氟表面活性剂介质中的合成和酸度表征

摘要

以全氟壬酸为例，研究了在氟化表面活性剂介质中开发具有MFI结构的亚微米和纳米晶硅酸盐材料的方法。在氟化表面活性剂中，由于铝原子的存在，沸石骨架的晶体结构形成比硅沸石-1 慢。沸石中形成的布朗斯台德和路易斯酸位点的分数与引入反应混合物中的铝量无关。在轻质烯烃的低聚反应中，所合成的具有较低布朗斯台德酸位浓度和较小晶体尺寸的沸石的活性和操作稳定性与市售催化剂相似。