富硅超稳八面沸石研究——制备、表征、稳定性、羟基酸性及催化活性  

Studies of Ultrastable Faujasites Enriched in Silicon--Preparation, Characterization, Stability, Hydroxyl Acidity andcatalytic Activity

作　　者：王秋莹[1] 盛芬玲[1] 菅盘铭[1] 朱超[1] 许言和 阎子峰 车飚 

机构地区：[1]兰州大学化学系分析测试中心,兰州730000

出　　处：《高等学校化学学报》1992年第5期571-575,共5页Chemical Journal of Chinese Universities

摘　　要：用(NH_4)_2SiF_6二次合成法制备了Si/Al=4.2～7.1、结晶度大于94％的系列八面沸石(FSY样品),再于500℃水热处理得到相应的US-SY样品。XRD、DTA及IR研究发现US-SY样品较FSY样品有更高的热稳定性、骨架稳定性和酸强度,其裂解、歧化活性也优于FSY样品。Faujasiste zeolites(FSY) with different Si/Al ratios(4. 2-7.1) are prepared by secondary synthesis with (NH4)2SiF6. The corresponding US-SYC4. 2-7.1) samples are also prepared by the stabilization treatment of FSY samples at 500℃ hydrothermal condition. The XRD, DTA and IR studies show that the thermal stability and framework stability and acid strength of US-SY samples are higher than that of FSY samples. The catlalytic activity of USSY samples for the cumene cracking, toluene disproportionation and dealkylation actirity are superior to that of FSY samples.

关 键 词：富硅Y沸石 超稳八面沸石 催化活性 

分 类 号：TQ426.7[化学工程]