【摘要】 在K⁺体系下研究了新型无模板剂无晶种法合成ZSM-35分子筛,并考察了SiO₂/Al₂O₃、KOH/SiO₂、H₂O/SiO₂、晶化时间、晶化温度对合成的影响。采用XRD（X射线衍射仪）、SEM（扫描电子显微镜）、XRF（X射线荧光衍射仪）等手段对分子筛的晶体结构和形貌进行表征。结果表明,初始凝胶SiO₂/Al₂O₃=37.3～45,KOH/SiO₂=0.23～0.41,H₂O/SiO₂=24.1～34.2,晶化温度为160～170℃,晶化时间为4～8 d可以合成出ZSM-35分子筛。当温度在160℃下合成7 d所得样品的相对结晶度最高,当温度在170℃下合成4 d为最佳合成条件。而且使用该方法合成出的ZSM-35分子筛形貌呈花瓣球状,片状花瓣大小介于358 nm～2.87μm。更多还原

【Abstract】 The ZSM-35 zeolite was synthesized by a novel method without organic template and seeding under K⁺ system. The effects of SiO₂/Al₂O₃, KOH/SiO₂, H₂O/SiO₂, crystallization time and crystallization temperature on the synthesis were investigated. The crystal structure, morphology of the zeolite were characterized by XRD（X-ray diffractometer）, SEM（scanning electron microscope） and XRF（X-ray fluorescence diffractometer）. The results show that, ZSM-35 zeolite is synthesized when the initial gel SiO₂/Al₂O₃ is 37.3-45, KOH/SiO₂ is 0.23-0.41, H₂O/SiO₂ is 24.1-34.2, the crystallization temperature is 130-170 ℃, the crystallization time is 2-8 d. The relative crystallinity of the sample synthesized within 7 d at 160 ℃ is the highest, and the synthesis is carried out at a temperature of 170 ℃ for 4 d as the optimum synthesis condition. Moreover, the ZSM-35 zeolite synthesized by this method has a spherical shape like a petal, and the size of the flaky petals is between 358 nm and 2.87 μm.更多还原