【摘要】 为解决传统水热合成法中模板剂合成复杂、晶化周期长等问题，采用沸石转晶法将超稳Y型（USY）沸石作为Si和Al的主要来源，以少量的MCM-68作为晶种，成功合成了UZM-35分子筛。基于磷改性是改善Mobil sieves（MSE）分子筛催化裂解性能的有效手段，通过浸渍法将3-氨基丙基磷酸和磷酸三甲酯分别负载在UZM-35分子筛上，磷元素的引入降低了分子筛的酸强度，对分子筛的骨架结构起到保护作用。采用X-射线衍射（XRD）、扫描电子显微镜（SEM）、氮气物理吸附-脱附、固体核磁、氨气程序升温脱附（NH₃-TPD）、吡啶红外（Py-IR）等手段对不同磷源改性的分子筛形貌、孔道结构和酸强度进行了表征测定。采用固定床反应器进行正庚烷催化裂解性能评价实验。结果表明：在反应温度933 K、质量空速5 h^-1、磷负载质量分数1%的条件下，3-氨基丙基磷酸改性的UZM-35分子筛的乙烯+丙烯选择性为65.0%，比未改性的UZM-35-DeAl和磷酸三甲酯改性的UZM-35分别高出8.8百分点和7.5百分点，比ZSM-5分子筛高出12.6百分点。更多还原

【Abstract】 To solve the problems of complex synthesis of templating agent and long crystallisation period in the traditional hydrothermal synthesis method,UZM-35 zeolite was successfully synthesized by inter-zeolite transcrystallisation method using ultrastable Y-type （USY） zeolite as the main source of Si and Al,and a small amount of MCM-68 as the crystalline species.Based on the fact that phosphorus modification is an effective means to improve the catalytic cracking performance of Mobil sieves （MSE） zeolite,3-aminopropylphosphoric acid and trimethyl phosphate were loaded respectively on UZM-35 zeolite by impregnation method method;the introduction of phosphorus elements not only reduces the acid strength of the zeolite,but also plays a role in protecting its backbone structure.The morphology,pore structure and acid strength of zeolite modified with different phosphorus sources were characterised and determined using X-ray diffraction （XRD）,scanning electron microscopy （SEM）,nitrogen physical adsorption-desorption,solid-state nuclear magnetism,ammonia-programmed temperatureraising desorption （NH₃-TPD） and pyridine infrared （Py-IR）.The n-heptane catalytic cracking experiments were carried out using a fixed-bed reactor.The results show that:at a reaction temperature of 933 K,a mass hourly space velocity of 5 h^-1,and a phosphorus loading mass fraction of 1%,the 3-aminopropyl phosphate-modified UZM-35 zeolite has the ethylene and propylene selectivity of 65.0%,which is 8.8 percent point and 7.5 percent point higher than that of the pristine UZM-35-DeAl and trimethyl phosphate-modified UZM-35,respectively,and 12.6 percent point higher than that of commercial ZSM-5 zeolite.更多还原