关键词: 拟薄水铝石, 分子筛, ZSM-22, 水热合成, 无机碱

Abstract:

In the proposed boehmite as aluminum source, synthesis conditions investigated alumina ratio, the amount of seed, inorganic bases, crystallization time, crystallization temperature, water and other by hydrothermal crystallization method for the synthesis of zeolite ZSM-22 affected. Using XRD (X-ray diffraction), SEM (scanning electron microscope) and other characterization methods for the synthesis of the samples were characterized. Experimental results show that the crystallization temperature of 413-433 K, the crystallization time is 48 h, the seed addition amount of 1 500 μg/g, SiO2/Al2O3 mole ratio of 70-130, (1,6-hexanediamine) DAH/SiO2 is 0.3, H2O/SiO2 from 35-50, no inorganic base crystallinity can be synthesized ZSM-22 zeolite good.

Key words: pseudo boehmite, zeolite, ZSM-22, hydrothermal synthesis, alkali