Citation: ZHAO Dong-Pu, ZHANG Yan, LI Zhuo, YU Jian-Qiang. High Efficient Seeding Synthesis of LSX Molecular Sieve with Low Si-Al Ratio[J]. Chinese Journal of Inorganic Chemistry, ;2016, 32(11): 1995-2002. doi: 10.11862/CJIC.2016.255 shu

High Efficient Seeding Synthesis of LSX Molecular Sieve with Low Si-Al Ratio

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Faculty of Chemistry and Chemical Engineering, Collaborative Innovation Center for Marine Biomass Fiber Materials and Textiles of Shandong Province, Qingdao University, Qingdao, Shandong 266071, China

Corresponding author: ZHANG Yan,
Received Date: 10 July 2016
Available Online: 21 September 2016
Fund Project:

Influencing factors for the synthesis of LSX molecular sieve, such as LSX seed, nK/nNa and crystallization conditions were investigated in detail. The products were characterized by XRD, SEM, XRF, FTIR and N₂ adsorption-desorption. The results revealed that the addition of LSX seed could accelerate the rates of crystal nucleation and growth, and inhibit the formation of A type and sodalite zeolites. Furthermore, too high or too low value of n_K/n_Na in the synthesis gel would obtain A type and sodalite impurities. Crystallization at high temperature directly would lead the conversion of metastable LSX zeolite into more thermodynamically stable zeolite phase. The Si-Al ratio, the surface area and N₂ adsorption capacity of the end product decreased with the extending of aging time and the increasing of crystallization temperature.
- LSX molecular sieve;seeding method;low-cost;high efficiency
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沈阳化工大学材料科学与工程学院沈阳 110142