粉煤灰提取硫酸铝的残渣制备4A分子筛  

PREPARATION 4A-MOLECULAR SIEVE WITH SULFATE RESIDUE FROM FLY ASH EXTRACTION OF ALUMINUM

作　　者：白光辉[1] 徐鹏[1] 滕玮[1] 王香港[1] 邢远清[1] 

机构地区：[1]西安建筑科技大学理学院,西安副教授710055

出　　处：《煤炭转化》2009年第2期79-82,共4页Coal Conversion

基　　金：中煤能源公司和山西省朔州市政府企业自主创新科技资助项目(YFZX(08)04)

摘　　要：利用粉煤灰酸法提取硫酸铝的残渣为原料,采用固相合成法进行4A分子筛的合成.并对其制备工艺条件和产品性能进行了实验研究,得到相应的较佳工艺条件为:粉煤灰酸渣∶氢氧化铝∶氢氧化钠=10∶4∶15;焙烧温度800℃~860℃,焙烧时间2 h^3 h;凝胶形成温度为55℃,时间2 h;晶化温度90℃~95℃,时间4 h^6 h.并对产品进行了XRD,SEM及IR等结构表征,与标准4A分子筛进行比较,结果显示所合成的产品为4A分子筛.The paper studies the process of preparation of 4A-molecular sieve with sulfate residue as raw material from fly ash extraction of aluminum, using solid-phase synthesis method to compose 4A-molecular sieve. The paper also studies the better corresponding conditions of preparation and performance is fly ash acid residue ： aluminum hydroxide ： sodium hydroxide= 10 ： 4 ： 15; baking temperature is 800 ℃-860 ℃, baking time 2 h-3 h; gel formation temperature is 55 ℃, time 2 h; crystallization temperature is 90 ℃-95 ℃, time 4 h to 6 h. The products structural characterization tested by XRD, SEM, IR and so on. Comparison with standard 4A-molecular sieve, the results showed that the synthetic product is the 4A-zeolite.

关 键 词：4A分子筛 粉煤灰 固相反应 XRD SEM 

分 类 号：TQ536.4[化学工程—煤化学工程]