Tubular oriented silicalite-1 membranes were prepared on the inner surface of α-alumina tubes by secondary (seeded) growth. Membrane microstructures including orientation, thickness and defect densities which affected membrane performance could be regulated by synthesis optimization for butane isomer separation. Synthesis parameters such as synthesis temperature, synthesis time and solution composition were modified. Membrane orientation was greatly affected by synthesis temperature. Two typical membranes of highly (h 0 h)-oriented and mixed (h 0 h)&c-oriented membranes were obtained after synthesis optimization. Four highly (h 0 h)-oriented silicalite-1 membranes prepared under optimized synthesis conditions showed ideal H₂/SF₆ selectivities of 1325 ± 35, which was much higher than that of mixed (h 0 h)&c-oriented membrane M3 (3 0 0), indicating that the former membranes had fewer boundary defects. These highly (h 0 h)-oriented membranes displayed n-butane permeances and separation factors were (2.26 ± 0.23) × 10⁻⁷ mol (m² s Pa)⁻¹ and 32.7 ± 2.5 for an equimolar n-butane/i-butane mixture at 333 K, respectively. The low deviations in permeance and selectivity indicate that membrane synthesis had a good reproducibility. This average n-butane permeance for these highly (h 0 h)-oriented membranes was 4 times higher than that of mixed (h 0 h)&c-oriented membrane M3. Both kinds of highly (h 0 h)- and (h 0 h)&c- silicalite-1 membranes displayed the similar trend with test temperature and pressure.

通过二次（种子）生长在α-氧化铝管的内表面上制备管状取向的silicalite-1膜。膜的微结构，包括取向，厚度和缺陷密度等会影响膜性能的因素，可以通过合成优化进行丁烷异构体分离来调节。修改了合成参数，如合成温度，合成时间和溶液组成。膜的取向受合成温度的影响很大。经过合成优化，获得了两种典型的高度（h 0 h）取向和混合（h 0 h）＆c取向膜的膜。在优化的合成条件下制备的四种高度（h 0 h）取向的silicalite-1膜显示理想的H₂ / SF ₆选择性为1325±35，远高于混合（h 0 h）和c取向膜M3（3 0 0），表明前者的膜具有较少的边界缺陷。这些高度（H 0 H ^）取向的膜显示Ñ丁烷渗透率和分离系数分别为（2.26±0.23）×10 ^-7 摩尔（米² 小号帕）^-1和32.7±2.5的等摩尔Ñ丁烷/我-丁烷混合物的温度分别为333K。渗透率和选择性的低偏差表明膜合成具有良好的重现性。这个平均值n这些高度（h 0 h）取向的膜的丁烷渗透率比混合（h 0 h）和c取向的膜M3的渗透率高4倍。两种高度（h 0 h）-和（h 0 h）＆c -silicalite-1膜在测试温度和压力下均显示出相似的趋势。