摘要
水热法合成4A沸石的实验是在不同的碱度、不同的液固比、不同的晶化温度和不同的晶化时间条件下进行的,并进行了实验结果和各种合成因素的分析及研究。实验结果分析表明在加碱煅烧及合成沸石的过程中,使用NaOH的效果比使用Na2CO3和KOH,加入适量的晶种能缩短晶化反应时间并能提高合成沸石的质量。在碱度为2.5 ～4.0M、液固比6:1 ～8:1、晶化温度90 ～103℃以及晶化时间为3 ～5h的实验条件下,采用苏州高岭土合成了4A沸石。文中还采用X射线衍射仪和扫描电镜对合成的沸石样品进行了表征。
The experiments with hydrothermal method to synthesize 4A-type zeolite have been carried on in different conditions of alkalinity, liquid solid ratio, the temperature and time of crystallization and the experimental results and synthetical factors were analyzed and researched. Analysis and experimental results indicate that NaOH has more effect than Na2CO3 and KOH in the process of synthesizing zeolites and alkali calcination, proper crystal seeds can cut down the time of crystallization and improve quality of synthesized zeolites. In the conditions of alkalinity 2.5-4.0M, liquid/solid ratio 6：1-8：1, temperature of crystallization 90-103℃ and time of crystallization 3-5h, 4A-type zeolite can be synthesized from SZT. The synthetical zeolites are characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2007年第5期1197-1201,共5页
Journal of Synthetic Crystals
基金
The project supported by Henan Outstanding Youth Science Fund(No.0612002400)
关键词
高岭土
4A沸石
预处理
水热法
kaolin
4A-type zeolite
pretreatment
hydrothermal method
