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Realumination of dealuminated zeolites Y

✍ Scribed by Z. Zhang; X. Liu; Y. Xu; R. Xu

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
581 KB
Volume
11
Category
Article
ISSN
0144-2449

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✦ Synopsis

H4EDTA-and SiCI4-vapor-dealuminated zeolite Y were realuminated with aqueous solutions of NaAIO2 and NaOH. The products were characterized by using XRD, MAS n.m.r., F-/3.r., and second-derivative F'/].r. techniques. The results clearly show that insertion of aluminum species into the frameworks of the zeolites occurs through the occupancy of the structural vacancies present in the dealuminated zeolites Y and/or through substitution of aluminum species for the framework silicon atoms. Effects of alkalinity of the solution and concentration of NaAIO2 on realumination were also investigated.

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