Materials
Sodium metaaluminate (> 98.5% purity), cetyltrimethyl ammonium bromide (CTAB, > 99.0 % purity) and binder-containing zeolite X-I were purchased from Aladdin Industrial Co., Ltd (Shanghai, China). Sodium hydroxide (> 96.0% purity), ammonium chloride (> 99.5% purity) and binder-containing zeolite X-II were provided by Sinopharm Chemical Reagent Co., Ltd (Shanghai, China). Silica sol (solid content of 40 wt%) with average particle size of 20 nm, was obtained from Qingdao Fuso Refining & Processing Co., Ltd (Qingdao, China). n -Heptane (> 99.0 % purity), binder-containing zeolite X-III and all nitrates (> 99.0 % purity) were supplied by Shanghai Titan Scientific Co., Ltd (Shanghai, China). Binder-containing zeolite X-IV was acquired from Nankai University Catalysts Co., Ltd (Tianjing, China). 1-Hexene (> 99.0% purity) was provided by Huawei Ruike Chemical Industry Co., Ltd (Beijing, China). Deionized water was applied in all synthesis experiments. All chemicals were used without further purification.