caa a22 4500 467888558 CHVBK 20180406152741.0 cr unu---uuuuu 170328e20060801xx s 000 0 eng 10.1007/s11144-006-0075-6 doi (NATIONALLICENCE)springer-10.1007/s11144-006-0075-6 Acid-base properties of alumina prepared from a hydrated product of centrifugal thermal activation of hydrargillite (cta-product) [Elektronische Daten] [Eugenia V. Kul'ko, Aleksandra S. Ivanova, Anna A. Budneva, Evgenii A. Paukshtis] Summary: Acid-base properties of aluminas prepared by thermal treatment of a hydrated CTA-product at 600°C were studied. The CTA-oxides, representing γ-Al2O3, were shown to contain terminal and bridged OH-groups. The concentration of the terminal OH-groups in the CTA-oxides was found to exceed their concentration in γ-Al2O3 prepared by dehydration of the "precipitated” pseudoboehmite, whereas the concentration of the bridged OH-groups in the CTA-oxides was lower than that in γ-Al2O3 prepared from pseudoboehmite. The total concentration of the surface Lewis acid sites in CTA-oxides varies within the limits of 2.80-4.14 mmol/m2 and is essentially above that in g-Al2O3 (2.25 mmol/m2). The distinctive feature of the CTA-oxides is that their surface contains strong Lewis acid sites with nCO = 2220 and 2238 cm-1. The total concentration of basic sites in the CTA-oxides is lower than that in g-Al2O3, however, in contrast to g-Al2O3,they contain strong basic sites with nCDCl3 = 2200 cm-1. Springer-Verlag/Akadémiai Kiadó, 2006 alumina nationallicence acid-base properties nationallicence CTA-product nationallicence Kul'ko Eugenia V. Boreskov Institute of Catalysis, Novosibirsk 630090, Russia aut Ivanova Aleksandra S. Boreskov Institute of Catalysis, Novosibirsk 630090, Russia aut Budneva Anna A. Boreskov Institute of Catalysis, Novosibirsk 630090, Russia aut Paukshtis Evgenii A. Boreskov Institute of Catalysis, Novosibirsk 630090, Russia aut Reaction Kinetics and Catalysis Letters Kluwer Academic Publishers 88/2(2006-08-01), 381-390 0133-1736 88:2<381 2006 88 11144 https://doi.org/10.1007/s11144-006-0075-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11144-006-0075-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kul'ko Eugenia V. Boreskov Institute of Catalysis, Novosibirsk 630090, Russia aut NATIONALLICENCE 700 1- Ivanova Aleksandra S. Boreskov Institute of Catalysis, Novosibirsk 630090, Russia aut NATIONALLICENCE 700 1- Budneva Anna A. Boreskov Institute of Catalysis, Novosibirsk 630090, Russia aut NATIONALLICENCE 700 1- Paukshtis Evgenii A. Boreskov Institute of Catalysis, Novosibirsk 630090, Russia aut NATIONALLICENCE 773 0- Reaction Kinetics and Catalysis Letters Kluwer Academic Publishers 88/2(2006-08-01), 381-390 0133-1736 88:2<381 2006 88 11144 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer