The aluminosilicate zeolite SAPO-34 with CHA topology was synthetized by hydrothermal synthesis method using aluminum isopropoxide as aluminum source ,phosphoric acid as phosphorus source ,TEOS as silicon source and triethylamine as the template.The effects of reaction conditions such as the metal kinds and contents on zeolite crystal synthesis and crystal morphology were studied. The synthesized zeolite was characterized by XRD ,SEM and TG-DTA methods.The results showed that doping Co was benefit to the generation of SAPO-34 ,which could improve the crystallinity and decrease the crystal size. The amount of Co-doped could affect the morphology.Doping a small amount of metal Ti is beneficial to the formation of target products.%采用水热合成法,以异丙醇铝为铝源,磷酸为磷源,正硅酸乙酯为硅源,三乙胺为模板剂,合成出一种具有CHA拓扑结构的硅铝酸盐分子筛SAPO-34.通过掺杂过渡金属(Co和Ti),研究了金属的种类及其含量等反应条件对分子筛晶体合成和晶貌的影响.采用XRD、SEM和TG-DTA等表征手段对合成的分子筛进行表征.结果表明,掺杂金属Co元素有利于目标产物的生成,使结晶度提高且晶体尺寸减小,改变掺杂Co的量对分子筛的形貌也有影响;掺杂少量金属T i利于目标产物的生成.
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