Four-channel hollow fiber supported CHA zeolite membranes with relatively higher Si/Al ratios (3.6–3.9) were successfully synthesized using cheap choline chloride (CC) as structure directing agent. The influence of synthesis parameters, such as precursor composition, crystallization temperature and duration, on the composition and dehydration performance of CHA zeolite membranes was extensively investigated. TG, EDX and FT-IR results indicated that the template decomposed during membrane synthesis which generated some residue in CHA framework. Interestingly, no thermal treatment was necessary to open water permeating channels of the as-prepared CHA zeolite membranes. The SiO₂/Al₂O₃ ratio and CC content in the precursor significantly affected the separation performance. High-quality CHA zeolite membranes with the Si/Al ratio between 3.6 and 3.9 was prepared from precursor 28 SiO₂: 0.58 Al₂O₃: 4.7–5.7 CC: 11.78 Na₂O: 1260 H₂O at 413 K for 10 h. The as-synthesized membranes showed water permeation flux of 4.7–5.6 kg m⁻² h⁻¹ and separation factor of >2000 for pervaporation (PV) dehydration of 90 wt% ethanol/water mixture at 348 K. Moreover, the membrane showed long-term (>35 h) stability for the acetic acid dehydration.

使用便宜的氯化胆碱（CC）作为结构导向剂成功地合成了具有相对较高的Si / Al比（3.6-3.9）的四通道中空纤维支撑的CHA沸石膜。广泛研究了前驱体组成，结晶温度和持续时间等合成参数对CHA分子筛膜组成和脱水性能的影响。TG，EDX和FT-IR结果表明模板在膜合成过程中分解，在CHA骨架中产生了一些残基。有趣的是，不需要热处理来打开所制备的CHA沸石膜的水渗透通道。SiO ₂ / Al ₂ O ₃前驱体中的比率和CC含量显着影响分离性能。由前体28 SiO ₂：0.58 Al ₂ O ₃：4.7–5.7 CC：11.78 Na ₂ O：1260 H ₂ O在413 K下制备10 h ，制得Si / Al比在3.6和3.9之间的高质量CHA沸石膜。。合成后的膜在348 K下对90 wt％的乙醇/水混合物进行全蒸发（PV）脱水时，水的渗透通量为4.7–5.6 kg m ^-2  h ^-1，分离系数> 2000。乙酸脱水的长期（> 35小时）稳定性。