中文摘要：

以农业废弃物稻壳经酸化处理、焙烧所得的稻壳灰为硅源,通过水热法未经老化过程及添加晶种直接合成了P型分子筛。采用钙交换能力、XRD和SEM对所合成产物的晶体结构、表面形貌和离子交换性能进行了表征。研究结果表明,该工艺合成P型分子筛的最佳条件为：n（Na2O）/n（SiO2）=1.2,n（SiO2）/n（Al2O3）=7.0,n（H2O）/n（Na2O）=25,于85℃反应10 h,在此条件下合成的P型分子筛产品具有较高的结晶度,无杂相且晶粒精细,其钙交换能力达到每克P型分子筛可吸收305.4 mg碳酸钙。

英文摘要：

Synthesis of zeolite P by hydrothermal method using rice husk ash as silicon source was optimized.It was found that the maximum calcium exchange ability of zeolite P is 305.4 mg/g when synthesis was carried out at 1.2 of n（Na2O）/n（SiO2） molar ratio,7.0 of n（SiO2）/n（Al2O3） molar ratio,25 of n（H2O）/n（Na2O） and 85℃ of crystallizing temperature for 10 h.analysis by X ray diffraction and SEM suggested the better characteristic peak and the narrower grain-size distribution.