综述高岭土合成Y型分子筛研究进展,分别从原位合成、纳米分子筛、高硅分子筛和其他合成方法进行评述,并分析各种合成方法的优缺点。原位合成Y型分子筛是合成性质优良Y型分子筛的重要方法,相关研究不断深化成熟,以此方法合成特殊性能的Y型分子筛成功应用于催化裂化催化剂。合成具有特殊形态和结构组成的分子筛如小晶粒Y型分子筛、高硅Y型分子筛是近年来的研究热点。分别从优化合成条件、加入分散剂和使用微波加热法介绍小晶粒Y型分子筛合成研究进展。高硅Y型分子筛的合成主要分为直接合成和二次改性方法,直接合成法反应条件苛刻,存在原料浪费等问题;二次改性方法工艺流程长,易导致合成成本增加。重点讨论具有特种性能的特种Y型分子筛合成研究进展,对离子液体合成Y型分子筛、干胶转化合成Y型分子筛和高岭土合成复合分子筛等新方法进行综述,并结合其他先进的分子筛合成方法,指出Y型分子筛合成的研究方向和前景。
The research advance in synthesis of Y zeolite from kaolin were reviewed. The synthesis of Y zeolite with different methods such as in-situ synthesis of Y zeolite by kaolin microsphere,the synthesis of nanosized molecular sieves,the synthesis of high silica Y zeolite,and other methods were introduced. The analysis and comparison of various raw materials and different synthetic methods were given. Y zeolite synthesized by in-situ crystallization technique from kaolin clay was the most important method for obtaining excellent FCC catalysts. Recent progress in in-situ crystallizing technique was also reviewed. The research on synthesis of special Y zeolite with excellent performance ,especially the synthesis of nanosized and high silica Y zeolite,was focused on. The methods for preparing nanosized Y zeolites,such as optimizing synthesis conditions,adding dispersant agents and microwave synthesis,were described. Y zeolites with high molar ratio of silica to alumina was synthesize
