以内蒙古地区的高铝煤矸石为原料合成4A分子筛

摘要

研究了以内蒙古地区的煤矸石为原料,利用盐酸酸浸法、烧碱碱浸法和水热合成法制备4A分子筛,设计了工艺流程,考察了反应条件对4A分子筛结构和形貌的影响,并利用X射线衍射仪(XRD)、电镜扫描仪(SEM)及傅里叶转换红外光谱仪(FT-IR)等测试手段对其进行了表征.结果表明最佳条件为煤矸石煅烧温度为720℃,煅烧时间为1h,酸浸时间为2.5h,转速为220 r/min,水浴温度为95℃,烧碱碱浸时间为5h,碱浸温度为25℃,合成4A分子筛的陈化温度为25℃,陈化时间为1h,晶化温度为100℃,晶化时间为14 h,进行比较后得到了符合结构、形貌较优的4A分子筛产品.%4A-type zeolite molecular sieve was synthesized by the hydrothermal method, hydrochloric acid leaching and caustic soda alkaline leaching of coal gangue of Inner Mongolia. 4A- type zeolite molecular sieve was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FT-IR). The optimum conditions were: roasting temperature 720 ℃, roasting time 1 h, acid leaching time 2.5 h, rotating speed 220 r/min, water bath temperature 95 ℃, aging temperature 25℃, aging time 30min, crystallization temperature 100℃, crystallization time 14 h.