The alkylation of benzene with long chain α-olefins is a crucial process in the production of fine chemicals, which requires the upgrading from traditional homogeneous catalysis to heterogeneous catalysis involving zeolites. However, the application of zeolite catalysts has been limited by their fast deactivation due to constrained diffusion resulting from the sole micropores. To address this challenge, a desilication and secondary-crystallization strategy has been employed to fabricate hierarchically structured mesoporous Beta zeolites. The resultant mesoporous Beta zeolites demonstrate excellent catalytic activity and stability in the alkylation of benzene with 1-dodecene, arising from the exposed acid sites and enhanced internal diffusion. Importantly, the internal diffusion limitations for these mesopore Beta zeolites are negligible, which significantly extends their lifetime and improves their regeneration performance. To achieve these benefits, the degree of mesopores must be deliberately controlled. Overall, this approach provides a promising solution for achieving efficient and environmentally friendly alkylation processes.

中文翻译：

---

苯和 1-十二碳烯在介孔 Beta 沸石上烷基化合成十二烷基苯

苯与长链α-烯烃的烷基化是精细化学品生产中的关键过程，需要从传统的均相催化升级到涉及沸石的多相催化。然而，沸石催化剂的应用因其单一微孔导致的受限扩散而快速失活而受到限制。为了应对这一挑战，采用脱硅和二次结晶策略来制造分级结构的介孔 Beta 沸石。所得的介孔β沸石在苯与1-十二碳烯的烷基化反应中表现出优异的催化活性和稳定性，这是由于暴露的酸性位点和增强的内部扩散所致。重要的是，这些中孔 Beta 沸石的内部扩散限制可以忽略不计，这显着延长了它们的使用寿命并提高了它们的再生性能。为了实现这些好处，必须刻意控制中孔的程度。总体而言，该方法为实现高效且环境友好的烷基化过程提供了一种有前途的解决方案。