Influences of synthesis conditions on the growth and catalytic performance of the Ti-MWW zeolite membrane are investigated in this work. Medium crystallization time, crystallization temperature, molar ratios of the precursor synthesis gels (TiO₂/SiO₂, H₂O/SiO₂ and B₂O₃/SiO₂) are crucial to prepare the compact and good catalytic performance Ti-MWW zeolite membranes. High crystallization temperature and long crystallization time cause a hetero zeolite phase membrane on the mullite support. Excessive titanium in the precursor synthesis gel could easily arise TiO₂ particles and non-framework TiO₆ species on the membrane surface, which are greatly decreased the catalytic performance of the Ti-MWW zeolite membrane. Dilute precursor synthesis gel is not favor for preparing dense Ti-MWW zeolite layer. The as-synthesized Ti-MWW zeolite membrane is applied as catalytic membrane reactor for phenol hydroxylation by pervaporation in this study, the phenol conversion and benzenediol selectivity are 41.42% and 98.33%.

本文研究了合成条件对Ti-MWW分子筛膜生长和催化性能的影响。中等结晶时间，结晶温度，前体合成凝胶的摩尔比（TiO ₂ / SiO ₂，H ₂ O / SiO ₂和B ₂ O ₃ / SiO ₂）对于制备致密且良好的催化性能的Ti-MWW沸石至关重要。膜。较高的结晶温度和较长的结晶时间在莫来石载体上形成杂沸石相膜。前体合成胶中过量的钛很容易产生TiO ₂颗粒和无骨架的TiO ₆膜表面上的各种杂质，大大降低了Ti-MWW沸石膜的催化性能。稀释的前驱体合成凝胶不利于制备致密的Ti-MWW沸石层。本研究以合成的Ti-MWW分子筛膜为渗透蒸发酚羟基化的催化膜反应器，其苯酚转化率和苯二醇选择性分别为41.42％和98.33％。