Mordenite zeolites with diffusion-restricted access to the acid sites located in mono-dimensional 12-ring channels and 8-ring side pockets have found broad applications as catalysts for hydroisomerisation of linear C₅ and C₆ alkanes and other highly relevant acid-catalysed processes. The accessibility of the porous structure of mordenite (MOR) zeolite is traditionally enhanced by dealumination, but this is invariably connected with a dramatic reduction in the aluminium content and corresponding concentration of the acid sites in the zeolites. Here we describe the preparation of MOR zeolite with high micropore volume, three-dimensional supermicropores (d ∼ 7.5 Å) and good acid site accessibility by concurrent extraction of Si and Al using postsynthesis fluorination-alkaline-acid treatment. The concurrent extraction of Si and Al enables formation of more developed supermicroporous structure and preservation of the molecular Si/Al. The procedure yields MOR with a crystalline structure in which the Si/Al ratio and the micropore volume can be tailored (Si/Al from ∼ 6, V_MI up to 0.25 cm³.g⁻¹) by the chemical conditions of the treatment. The Al-rich 3D supermicroporous structure with accessible Brønsted and Lewis active sites provides strongly enhanced activity, selectivity and long-term catalytic stability in the transformation of n-hexane into the corresponding branched isomers.

具有扩散限制地进入位于一维12环通道和8环侧袋中的酸性位点的丝光沸石已被广泛用作线性C ₅和C _6的加氢异构化催化剂烷烃和其他高度相关的酸催化方法。传统上通过脱铝提高丝光沸石（MOR）沸石的多孔结构的可及性，但这总是与铝含量的大幅降低和沸石中酸位的相应浓度有关。在这里，我们描述了通过合成后氟化-碱性酸处理同时萃取Si和Al来制备具有高微孔体积，三维超微孔（d〜7.5Å）和良好的酸位可及性的MOR沸石的方法。同时提取Si和Al使得能够形成更发达的超微孔结构并保存分子Si / Al。该程序产生的MOR具有晶体结构，其中可以调整Si / Al比例和微孔体积（Si / Al约为6，V根据处理的化学条件，_MI最高可达0.25 cm ³ .g ^-1）。配有无障碍布朗斯德和刘易斯的活性位点的铝丰富的3D supermicroporous结构提供大力加强活性，选择性和长期稳定的催化中的转型ñ正己烷到相应的支化异构体。