期刊文献+

粉煤灰分步溶出硅铝制备纯沸石分子筛的研究 被引量:21

Synthesis of Pure Zeolites by Dissolved Silicon and Aluminium from Fly Ash by Stages
下载PDF
导出
摘要 研究了一种由粉煤灰合成纯沸石分子筛的新工艺,粉煤灰与碳酸钠混合焙烧生成硅酸钠和硅铝酸钠,用少量水浸取其中的硅酸钠,含硅铝酸钠的残余物用碱液浸取。实验发现,在碱溶过程中溶液中的硅铝存在过饱和现象,在过饱和期内实现固液分离,可提取粉煤灰中的硅铝用于合成X型、A型、P型纯沸石产品。1kg粉煤灰合成310~560g纯沸石。晶化导向剂和晶种对沸石晶型和晶化时间有很大影响。经仪器和化学分析方法对沸石产品从矿物组成和阳离子交换容量进行表征,制得产品的阳离子交换容量可达3.2~4.7meq/g,纯度较高。 In the method presented here, the activity of silicon and aluminum in coal fly ash was stimulated by calcination with sodium carbonate. The calcined product was treated by a method involving a desilication and hydrothermal process, and the silicon and aluminum eluted from coal fly ash was used for the synthesis of pure X, A, P type zeolites. Crystallization directing agents or crystal seeds have a promoting effect on the type of crystallization achieved. The products have been characterized in terms of mineralogical composition and cation exchange capacity (CEC). The results show that the pure zeolites exhibit high cation exchange capacities ranged from 3.2 to 4.7meq/g, and th.e yield from 310 to 560 g/ kg coal fly ash.
出处 《硅酸盐通报》 CAS CSCD 北大核心 2007年第1期19-24,共6页 Bulletin of the Chinese Ceramic Society
基金 北京市自然科学基金资助项目(No.8042015)
关键词 水热合成 纯沸石 阳离子交换容量 hydrothermal synthesis pure zeolites cation exchange capacity
  • 引文网络
  • 相关文献

参考文献13

  • 1Poole M C.A comparative study using two methods to produce zeolites from fly ash[J].Minerals Engineering 2004,17:167-173.
  • 2Kikuchi R.Application of coal ash to environmental improvement:Transformation into zeolite,potassium fertilizer,and FGD absorbent[J].Resources,Conservation and Recycling 1999,27:333-346.
  • 3Querol X.Umana J C,Plana F,et al.Synthesis of zeolites from fly ash at pilot plant scale.Examples of potential applications[J].Fuel,2001,80:857-865.
  • 4Steenbruggen G,Hollman G G.The synthesis of zeolites from fly ash and the properties of the zeolite products[J].J Geochemical Exploration,1998,62:305-309.
  • 5Murayama N,Yamamoto H,Shibata J.Mechanism of zeolite synthesis from coal fly ash by alkali hydrothermal reaction[J].Int J Miner Process,2002,64:1-17.
  • 6Shigemoto N,Sugiyama S,Hayashi H.Characterization of Na-X,Na-A,and coal fly ash zeolites and their amorphous precursors by IR,MAS NMR and XPS[J].J Mater Sci,1995,30:5777-5783.
  • 7Hollman G G,Steenbruggen G,Janssen-Jurkovicova M.A two-step process for the synthesis of zeolites from coal fly ash[J].Fuel,1999,78:1225-1230.
  • 8Tanaka H,Sakai Y,Hino R.Formation of Na-A and Na-X zeolites from waste solutions in conversion of coal fly ash to zeolites[J].Material Research bulletin,2002,37:1873-1884.
  • 9叶亚平,钱维兰,王明文,等,用粉煤灰制备白炭黑和纯沸石分子筛的方法[P].中国专利:200610112749.
  • 10朱翔.水中铝的吸光光度法测定[J].理化检验(化学分册),1992,28(5):314-317. 被引量:2

二级参考文献1

  • 1张铨昌,天然沸石离子交换性能及其应用,1986年

共引文献9

同被引文献278

引证文献21

二级引证文献135

;
使用帮助 返回顶部