Page 42 - 201906

·1048· 精细化工 FINE CHEMICALS 第 36 卷

术成功地制备出六方晶型 EMT 分子筛。晶化温度 48-58.
110 ℃、晶化时间 6 d 时，制备得到的 SEMC-2 分子 [4] Tao Haixiang (陶海祥). Synthesis and catalytic performance of
筛直径为 3~4 μm，厚度为 300~400 nm。 hierarchical zeolites [D]. Shanghai: East China University of Science
and Technology (华东理工大学), 2013.
（2）在 n(Na 2 O)∶n(Al 2 O 3 )=2.4∶1.0 时，蒸汽晶
[5] Zheng J W, Jin D L, Liu Z T, et al. Synthesis of nanosized SAPO-34
化温度低于 135 ℃时能得到纯的 EMT 分子筛。
via an azeotrope evaporation and dry gel conversion route and its
（3）含甲醇、丙醛两种极性含氧杂质的氮气和 catalytic performance in chloromethane conversion [J]. Industrial &
乙烯原料气吸附净化实验表明，蒸汽晶化制备得到 Engineering Chemistry Research, 2018, 57 (2): 548-558.
的 EMT 分子筛与水热晶化制备得到 EMT 分子筛均 [6] Wang Junfen (王俊芬), Liu Xuguang (刘旭光), Zhang Pingping (张
能使甲醇、丙醛两种杂质降至摩尔分数 0.0001%以 萍萍). Synthesis of continuous and dense TAPO-5 molecular sieve
membranes by steam-assisted gel conversion method [J]. Journal of
下，且具备相似的甲醇、丙醛深度吸附净化性能。
Inorganic Materials (无机材料学报), 2013, 28 (6): 589-593.
（4）在氮气体系中，水热晶化及蒸汽晶化制备 [7] Wong S F, Awala H, Vincente A, et al. K-F zeolite nanocrystals
得到的 EMT 分子筛的吸附穿透时间分别为 73.0 和 synthesized from organic-template-free precursor mixture [J].
73.4 h，二者对甲醇、丙醛的累积吸附容量分别为 Microporous and Mesoporous Materials, 2017, 249: 105-110.
55.99、113.93 mg/g 和 56.35、116.88 mg/g。在乙烯 [8] Ng E P, Lim G K, Khoo G L, et al. Synthesis of colloidal stable linde
type J (LTJ) zeolite nanocrystals from rice husk silica and their
为原料气时，二者的吸附穿透时间分别为 22.84 和
catalytic performance in knoevenagel reaction [J]. Materials
23.60 h，对甲醇、丙醛的累积吸附容量分别为 98.17、
Chemistry and Physics, 2015, 155: 30-35.
171.64 mg/g 和 101.44、180.34 mg/g。 [9] Ng E P, Awala H, Ghoy J P, et al. Effects of ultrasonic irradiation on
（5）蒸汽晶化制备得到的 EMT 分子筛通过物 crystallization and structural properties of EMT-type zeolite
理吸附过程脱除甲醇和丙醛，其脱除机理为极性含 nanocrystals [J]. Materials Chemistry and Physics, 2015, 159: 38-45.
氧化合物自身氧中的孤电子对与 SEMC-2 分子筛中 [10] Lohse U, Pitsch I, Schreier E, et al. Cubic and hexagonal faujasites
with varying Si/Al ratios I. synthesis and characterization [J].
+
的 Na 或分子筛晶格氧之间的相互作用。
Applied Catalysis A: General, 1995, 129(2): 189-202.
下一步将采用蒸汽晶化法制备 EMT 分子筛膜
[11] Rep M, Palomares A E, Eder-Mirth G, et al. Interaction of methanol
及研究其烯烃中极性含氧化合物深度净化性能。 with alkali metal exchanged molecular sieves. 1. IR spectroscopic
study [J]. Journal of Physical Chemistry B, 2000, 104: 8624-8630.
参考文献：
[12] Mirth G, Lercher J A, Anderson M W, et al. Adsorption complexes of
[1] Zhou Y X, Chen W, Wang P F, et al. EMT-type zeolite for deep methanol on zeolite ZSM-5 [J]. Journal of the Chemical Society,
purification of trace polar-oxygenated compounds from light olefins Faraday Transactions 1: Physical Chemistry in Condensed Phases,
[J]. Microporous and Mesoporous Materials, 2018, 271: 273-283. 1990, 86: 3039-3044.
[2] Guo Juhua (郭菊花), Chen Huadan (陈华丹), Xia Zheng (夏峥). [13] Herzberg G. Molecular spectra and molecular structure.Ⅱ. Infrared
Synthesis of zeolite W by steam assisted-conversion method [J]. and Raman spectra of polyatomic molecules [M]. D Van Nostrand
Journal of Synthetic Crystals ( 人工晶体学报 ), 2016, 45(12): Company Inc Princeton, 1964: 334-335.
2871-2877. [14] Forester T R, Howe R F. In situ FTIR studies of methanol and
[3] Zhao Tianbo (赵天波), Wang Jia (王佳), Xu Xin (徐鑫). Preparation dimethyl ether in ZSM-5 [J]. Journal of the American Chemical
of hierarchically trimodal-porous ZSM-5 composites through steam- Society, 1987, 109 (17): 5076-5082.
assisted conversion of macroporous aluminosilica gel with two [15] Kazansky, V B. State and properties of ion-exchanged cations in
different quaternary ammonium hydroxides [J]. China Petroleum and zeolites: 2. IR spectra and chemical activation of adsorbed methane
Petrochemical Technology (中国炼油与石油化工), 2015, 17(1): [J]. Kinetika i Kataliz, 2014, 55: 737-747.