采用两步法在α-Al_2O_3载体上合成了致密连续的beta分子筛膜。首先,晶种层在无氟碱性体系中生长并交联形成致密的beta膜;然后,在含氟的近中性体系中再次生长形成具有(h0l)取向的分子筛膜,膜厚度约为3μm。在450℃高温脱除模板剂以后,将膜进行单组分渗透蒸发实验。实验结果表明采用两步法合成的beta分子筛膜几乎无缺陷。 A dense and continuous beta zeolite membrane was synthesized on α-Al 2 O 3 support by a two-step method. First, the seed layer grows and crosslinks in a fluorine-free basic system to form a dense beta membrane; then, a molecular sieve membrane having a (hOl) orientation is grown again in a fluorine-containing near-neutral system with a film thickness of about 3 [mu] m . After removing the templating agent at a high temperature of 450 ° C, the membrane was subjected to one-component pervaporation experiments. The experimental results show that the two-step synthesis of zeolite beta membrane almost no defects.