阳离子表面活性剂对4A沸石晶化过程的影响

Influence of Cationic Surfactants on the Crystallization of Zeolite 4A

研究了阳离子表面活性剂加入量对4A沸石晶化速度以及阳离子表面活性剂的碳氢链长对4A沸石晶化速度和粒度的影响。结果表明,添加少量的阳离子表面活性剂,即阳离子表面活性剂与氧化铝的摩尔比不大于0 1,4A沸石晶化速度随阳离子表面活性剂的加入量及碳氢链长的增加而增加,可使4A沸石晶化时间缩短20%,并使4A沸石的平均粒度减小,粒度分布变窄。

Influences of the quantity of cationic surfactants on the crystallization rate of zeolite 4A and the length of hydrocarbon chain of cationic surfactants on the crystallization rate and particle size distributions of zeolite 4A were studied.The results indicated that,adding a small amount of cationic surfactants(mole ratio of cationic surfactants to alumina less than 0.1),the crystallization rate increased with the quantity and the length of hydrocarbon chain of the cationic surfactants,and the crystallization time of zeolite 4A could be reduced by 20%.Moreover,addition of a small amount of cationic surfactants led to a reduced mean size and narrower size distribution of zeolite 4A.