摘要
采用工业氢氧化铝废渣和水玻璃为原料 ,直接合成 4A沸石。研究了原料配比、晶化温度和晶化时间对产品性能的影响 ,探索了 4A沸石的合成机理。结果表明 ,最佳合成条件为n (SiO2 ) /n (Al2 O3) =2 1～ 2 9,晶化温度为 10 0℃ ,晶化时间为 3h ,产品钙交换量为w (CaCO3) 30 2 % (干 ) ,粒度≤ 4 μm (>90 % ) ,白度为 91% ,pH <10 9,质量超过我国轻工部日化原字第 152号 (87)关于合成 4A沸石质量的参考标准。
A zeolite has been prepared with industrial aluminum dregs and water glass. The forming mechanism of 4A zeolite and influence on sample capability of precausors , crystallization temperature and time have been studied. The experimental results show the best conditions are n (SiO 2)/ n (Al 2O 3) ratio of 2 1～2 9, crystallization temperature of 100℃ and time of 3 h, and the exchange capacity of calcium is w (CaCO 3)30 2%(dry), the relative whiteness is 91%, and parthcla-size≤4 μm(>90%), pH<10 9, which surpass the 4A zeolite standard(1987) of Department of Light Industry in China.
出处
《桂林工学院学报》
2000年第1期53-56,共4页
Journal of Guilin University of Technology
关键词
氢氧化铝废渣
4A沸石
合成机理
沸石
industrial aluminum dregs
4A zeolite
synthesizing mechanism
