【摘要】 用水热晶化法合成了ＡｌＰＯ４－５和ＳＡＰＯ－５分子筛，借助ＸＲＤ、ＩＲ、吸附吡啶的ＩＲ及ＮＨ３－ＴＰＤ等手段对其进行了表征，并通过间二甲苯异构化反应对其催化性能进行了评价．将其催化性能与表征结果相关联得出：Ｂ酸中心是间二甲苯异构化的活性中心，ＳＡＰＯ－５的Ｂ酸中心多，其间二甲苯异构化的活性（４５．８％）和选择性（６３．２４％）也高．异构化的选择性还与Ｂ酸中心的强度有关．更多还原

【Abstract】 AlPO 4 5 and SAPO 5 molecular sieves were synthesized by hydrothermal method, and characterized by XRD,IR, pyridine adsorption IR and NH 3 TPD. Their catalytic performance was evaluated by the reaction of m xylene isomerization. By correlating the catalytic performance with the result of characterization it is shown that Br[AKo¨D〗nsted acid is the active center of m xylene isomerization; more Br[AKo¨D〗nsted acid centers exist in SAPO 5, so it has higher isomerization activity (45.8%) and selectivity (63.24%). There is a relation between the strength of Br[AKo¨D〗nsted acid center and the isomerization selectivity.更多还原