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Preparation of 4A zeolite molecular sieve from coal gangue of Inner Mongolia

MA Zhaofei,BAI Jie,LI Chunping,ZHANG Yongfeng,JIANG Yu   

  1. School of Chemical Engineering,Inner Mongolia University of Technology,Huhhote 010051,Inner Mongolia,China
  • Online:2013-03-05 Published:2013-03-05

以内蒙古地区的高铝煤矸石为原料合成4A分子筛

马兆菲,白 杰,李春萍,张永锋,江 宇   

  1. 内蒙古工业大学化工学院,内蒙古 呼和浩特 010051

Abstract: 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 30 min,crystallization temperature 100 ℃,crystallization time 14 h.

Key words: 4A-type zeolite molecular sieve, coal gangue, hydrothermal method, hydrochloric acid leaching, caustic soda alkaline leaching

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1 h,酸浸时间为2.5 h,转速为220 r/min,水浴温度为95 ℃,烧碱碱浸时间为5 h,碱浸温度为25 ℃,合成4A 分子筛的陈化温度为25 ℃,陈化时间为1 h,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。

关键词: 4A分子筛, 煤矸石, 酸浸法, 碱浸法, 水热法

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