Page 35 - 201906

第 36 卷第 6 期 精 细 化 工 Vol.36, No.6
201 9 年 6 月 FINE CHEMICALS June 2019

功能材料
蒸汽晶化法制备 EMT 分子筛及其烯烃净化性能

1*
周永贤 1,2 ，陈 伟 ，王鹏飞 1,2*
（1. 上海绿强新材料有限公司，上海 201806；2. 聚烯烃催化技术与高性能材料国家重点实验室 上海化
工研究院有限公司，上海 200062）

摘要：以 18-冠醚-6 为模板剂，运用蒸汽晶化法制备了六方晶型八面沸石类似物（EMT）分子筛（记为 SEMC-2）。
在 n(Na 2 O)∶n(Al 2 O 3 )=2.4∶1.0 时，重点考察了蒸汽晶化时间、蒸汽晶化温度对 EMT 分子筛晶型的影响。结果
表明，在晶化温度 110 ℃，晶化时间 6 d 时，制备得到了直径为 3~4 m，厚度为 300~400 nm 的六方晶型 SEMC-2
分子筛。与传统的水热晶化制备得到的 EMT 分子筛（记为 HEMC-2）类似，该 SEMC-2 分子筛能将氮气和乙烯
气体中初始摩尔分数为 0.02%和 0.10%的甲醇、丙醛两种极性含氧杂质深度脱除至摩尔分数 0.0001%以下，且穿
透时间及吸附容量均没有表现出明显差异。此外，该 SEMC-2 分子筛具备良好的结构稳定性及较长的使用寿命。
+
原位红外谱图表明，SEMC-2 分子筛主要是通过杂质自身氧中的孤电子对与分子筛中的 Na 间相互作用的物理吸
附过程来脱除甲醇、丙醛两种杂质。
关键词：EMT 分子筛；蒸汽晶化；烯烃深度净化；极性含氧化合物；功能材料
中图分类号：TQ170.1 文献标识码：A 文章编号：1003-5214 (2019) 06-1041-08

Preparation of EMT Zeolite and Its Purification Performance on
Olefins by Steam Crystallization

1,2
1*
ZHOU Yong-xian , CHEN Wei , WANG Peng-fei 1,2*
（1. Shanghai Luqiang New Materials Co., Ltd., Shanghai 201806, China; 2. State Key Laboratory of Polyolefin
Catalytic Technology and High Performance Materials, Shanghai Research Institute of Chemical Industry Co., Ltd.,
Shanghai 200062, China）

Abstract: Hexagonal EMT zeolite (denoted as SEMC-2) was successfully synthesized using 18-crown-6
ether as template by steam crystallization (SAC) method. The effects of both SAC time and temperature on
the crystal form were studied when the n(Na 2O)∶n(Al 2O 3) =2.4∶1.0. The regular hexagonal platelets of
3~4 μm in diameter and 300~400 nm in thickness were synthesized under crystallization temperature
110 ℃, crystallization time 6 days. Similar to EMT zeolite prepared by traditional hydrothermal
crystallization method (denoted as HEMC-2), SEMC-2 zeolite could also deeply purify the trace amounts of
polar methanol and propanal to below mole percent 0.0001% from gaseous olefins at an initial mole percent
0.02% or 0.10%. Moreover, there was no significant difference in breakthrough time and cumulative
adsorption amount for HEMC-2 and SEMC-2 zeolite. The regeneration experiment indicated that SEMC-2
zeolite had more stable structure and longer service life. In-situ FTIR spectra demonstrated the adsorption
processes of SEMC-2 zeolite for methanol and propanal were a physical adsorption mainly via interaction
+
among the lone pair electrons in the impurity's own oxygen and Na in SEMC-2 zeolite.
Key words: EMT zeolite; steam crystallization; olefins deeply purification; polar-oxygenated compounds;
functional materials
Foundation item: Shanghai Science and Technology Talent Project (15XD1522300)

收稿日期：2018-10-12; 定用日期：2019-01-18; DOI: 10.13550/j.jxhg.20180751
基金项目：上海市科技人才计划项目（15XD1522300）
作者简介：周永贤（1977—），女，高级工程师，博士生。联系人：陈 伟（1989—），男，工程师，E-mail：charrycechen@sina.cn，
电话：021-69577696。王鹏飞（1969—），男，教授级高工，E-mail：wpf@sh-lq.com，电话：021-69577696。