钾长石碱法分解滤渣制W分子筛  

Synthesis of Zeolite W from Alkaline Leaching Residue of K-feldspar

作　　者：李彤彤[1] 陈华丹 陈佳伟[1] 饶悦晨 郭菊花[1] 童跃进[1] 

机构地区：[1]福建师范大学化学与化工学院,福建福州350007

出　　处：《广东化工》2015年第14期42-44,共3页Guangdong Chemical Industry

基　　金：福建省科技厅高校产学研重大项目(2013H6006);福建省教育厅资助项目(JB12047和JA14076);2014年国家级大学生创新创业训练计划项目资助(201410394009)

摘　　要：文章以钾长石碱法分解提钾后副产的硅铝质滤渣作为基础原料,通过补加KOH、Al(OH)3和H2O,水热合成W分子筛。利用SEM、XRD和FTIR表征手段,确认所合成产品为W分子筛并得到其最佳合成条件。结果表明,在最佳配比K2O/Si O2=1.0,Al2O3/Si O2=0.067,H2O/Si O2=45的条件下,经30℃下老化2 h,150℃下晶化24 h,可合成出形貌均一、结晶良好的W分子筛,其在模拟海水中的钾离子交换容量约为57 mg/g。Zeolite W was hydrothermally synthesized from alkaline leaching residue of K-feldspar with additional KOH, Al（OH）3 and H2 O. It was confirmed by XRD, SEM and FTIR that the product was Zeolite W and the optimum synthesis conditions were obtained. It was revealed that a batch of uniform and well crystallized zeolite W was produced under the aging temperature of 30 ℃ for 2 h, and crystallizing temperature of 150 ℃ for 24 h with the ratio of K2O/Si O2=1.0, Al2O3/Si O2=0.067, H2O/Si O2=45 in the reaction system. The K＋ exchange capacity of the product in the artificial simulated seawater is about 57 mg/g.

关 键 词：钾长石 水热合成 W分子筛 钾离子交换容量 

分 类 号：TQ424.25[化学工程]