摘要
原位晶化工艺就是利用偏高岭土和高岭土中具有化学反应活性的SiO_2和Al_2O_3,作为合成NaY分子筛的硅源和铝源,在碱性条件下水热合成Y型分子筛。通过对碱抽提高岭土组分特性变化的研究,对原位晶化过程中的物料迁移进行了探讨。研究表明,晶化开始时,固相中的活性SiO_2和Al_2O_3快速向液相中迁移,但氧化钠却由液相向固相迁移;随着晶化时间的延长,液相中的硅、铝和钠逐渐减少。
In-situ crystallization is a way for utilization of chemically-active SiO2 and Al2O3 in Kaolin as the source for synthesis of NaY zeolite. The transfer of species in the in-situ crystallization was investigated via base extraction of Kaolin constituents. The results showed that in the initial stage, active silica and alumina in the solid phase rapidly transferred to the liquid while sodium oxide transferred to the solid; silicon, aluminum and sodium in the liquid decreased with crystallization time.
出处
《工业催化》
CAS
2009年第1期19-21,共3页
Industrial Catalysis
