中文摘要：

通过正交实验，研究了硅源（记为SiO2）、铝源（记为Al2O3）、磷源（记为P2O5）、模板剂（记为R）和水对SAPO-18分子筛合成的影响，根据极差分析得到各因素对SAPO-18分子筛合成的影响顺序为：P2O5〉Al2O3〉R〉H2O〉SiO2。结合单因素实验，确定合成SAPO-18分子筛初始凝胶的最优摩尔比为：0．9P2O5：0．8Al2O3：1．8R：50H2O：0.6SiO2。利用XRD、SEM和FTIR等检测技术对样品进行表征，并考察样品对甲醇制烯烃（MTO）反应的催化活性。结果表明，所得SAPO-18分子筛样品纯净，并具有优良的催化性能，在甲醇转化率100％的情况下，总低碳烯烃选择性为86．97％，而且产物中C2～C4烷烃以及C5＋选择性较低。

英文摘要：

The influence of five actors （SiO2, Al2O3, P2O5, template denoted R, H2O） on the synthesis of SAPO-18 zeolite were studied via orthogonal experiment. The primary and secondary factors have been analyzed via the method of range analysis, and the sequence is P2O5 〉 Al2O3 〉 R 〉 H20 〉 SiO2. Based on the single factor experiment, the synthesis gel with optimum molar composition of 0.9 P2O5 ： 0.8 Al2O3 ： 1.8 R ： 50 H2O ： 0.6 SiO2 was determined to produce SAPO-18. The synthesized SAPO-18 was characterized by XRD, SEM, FTIR and so on. The catalytic activity of SAPO-18 was evaluated for methanol to olefins reaction. The results showed that the pure SAPO-18 products were synthesized and the selectivity of light olefins （86.97%） was high and the selectivities of C2-C4 alkanes and C5＋ were low in the MTO process.