以磷酸铝为铝源和磷源用水热合成法制备了具有CHA骨架结构的SAPO-34分子筛，采用XRD、BET、NH₃-TPD和SEM等手段对分子筛进行了表征。以甲醇裂解制取低碳烯烃(MTO)为模型反应，采用固定床反应装置，对制备的分子筛进行了催化性能评价。结果表明，合成的分子筛具有SAPO-34结构，酸性较强，在MTO反应中几乎只有乙烯生成，对乙烯的选择性达到90%以上，再生性能(热稳定性)较好，与按照传统方法合成的SAPO-34分子筛相比，催化性能更好。

A SAPO-34 molecular sieve with the CHA framework was synthesized by a hydrothermal method using aluminum phosphate as the source of aluminum and phosphorus, and characterized by XRD, BET, NH₃-TPD and SEM techniques. The catalytic performance of the molecular sieve was experimentally evaluated by taking methanol-to-olefins (MTO) as a model reaction in a fixed-bed reactor. The results showed that the molecular sieve only generated ethylene in the MTO reaction and the selectivity to ethylene was over 90%. Furthermore, the molecular sieve was found to have good regenerativity (or thermostability). Compared with SAPO-34 molecular sieves prepared by conventional methods, our product has a better catalytic performance, and thus it has good prospects for industrial application.