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- W64173002 abstract "Three methods have been developed in order to enlarge the pore size of the micropore-type zeolite into a mesopore type: (a) 0.2N HCl acid treatment at 80$spcirc$C from which the time of exposure to the acid medium has a great influence on the pore size distribution of the resulting materials. (b) A hydrothermal treatment followed by a mild acid treatment that can unblock the pore openings. (c) Finally, a treatment with 0.5M (NH$sb4$)$sb2$SiF$sb6$. The two first methods provided mesopores of 3.5-4.5 nm while the last one produced larger mesopores of ca. 14 nm. Several physico-chemical techniques were used to characterize the reaction products: BET measurements, XRD, AA Spectrophotometry, hydrophobicity measurement, bulk density, $sp{29}$Si- and $sp{27}$Al-NMR." @default.
- W64173002 created "2016-06-24" @default.
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- W64173002 date "1992-01-01" @default.
- W64173002 modified "2023-09-23" @default.
- W64173002 title "Preparation and characterization of mesoporous aluminosilicates from Ca-A zeolite" @default.
- W64173002 hasPublicationYear "1992" @default.
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