采用二次生长法在四通道α-Al₂O₃中空纤维支撑体上制备T型分子筛膜，系统优化了合成温度、合成时间、合成液碱含量。结果表明，当合成液摩尔组成为n（SiO₂）：n（Al₂O₃）：n（Na₂O）：n（K₂O）：n（H₂O）=1：0.05：0.26：0.09：17、合成温度为105℃时，水热合成35 h可制备出高性能的T型分子筛膜；用于90%乙醇/水混合体系脱水，在75℃下，膜分离因子可达6 500；在pH=5.5、含水70%的DMAC/水体系中，经分子筛膜脱水后产品水含量降为0.52%，渗透液平均COD仅为4 400 mg/L。

T-type molecular sieve membrane is synthesized on four-channel α-Al₂O₃ hollow fiber support by a secondary growth method.Synthesis temperature,synthesis time,and alkalinity in synthesis solution are systematically optimized.The results show that high performance T-type zeolite membrane can be obtained when n(SiO₂):n(Al₂O₃):n(Na₂O):n(K₂O):n(H₂O)=1:0.05:0.26:0.09:17,and the synthesis has performed at 105℃ for 35 h.Its separation factor can achieve 6 500 when it is used for a 90 wt.% ethanol/water mixing system at 75℃.Water content drops from 70 wt.% to 0.52 wt.% for the dehydration of DMAC/H₂O with a pH value of 5.5,and the average COD in the permeate side is only 4 400 mg·L^-1.