Hierarchical zeolites consisting of Beta nanoparticles (15 – 40 nm) were obtained via hydrothermal treatment of a concentrated zeolite gel-precursor (H₂O/Si = 2.5 – 14) without utilization of complex SDAs. The proposed approach is based on the formation of a large number of zeolite nuclei under particular crystallization conditions, followed by their agglomeration resulting in the dense packing of the particles preventing their further growth. The micelles of cetyltrimethylammonium bromide (CTAB) can be used to additionally limit the growth of zeolite nanoparticles during hydrothermal treatment of concentrated reaction mixtures. Such deceleration of crystallization promotes the formation of highly porous X-ray amorphous nanosized aluminosilicate. Due to the developed mesoporosity and increased accessibility to the acid sites for the molecules of a large size, hierarchical Beta zeolites obtained in the presence of CTAB demonstrate high catalytic activity in the reaction of bulky alcohols (1-octadecanol and 1-adamantanemethanol) with 3,4-dihydro-2H-pyran.

通过对浓缩的沸石凝胶前体（H ₂）进行水热处理，可以得到由β纳米粒子（15 – 40 nm）组成的分层沸石。O / Si = 2.5 – 14），而无需使用复杂的SDA。所提出的方法是基于在特定的结晶条件下形成大量沸石核，随后它们的附聚导致颗粒的密集堆积，从而阻止了它们的进一步生长。十六烷基三甲基溴化铵（CTAB）的胶束可用于额外限制浓缩反应混合物的水热处理过程中沸石纳米颗粒的生长。这种结晶的减速促进了高度多孔的X射线无定形纳米铝硅酸盐的形成。由于中孔的发展和大分子对酸位的可及性增加，H-吡喃。