PREPARATION OF A COMPLETE SERIES OF SINGLE-PHASE HOMOGENEOUS SOL-GELSOF AL2O3 AND MGO FOR BASIC CATALYSTS

Citation
T. Lopez et al., PREPARATION OF A COMPLETE SERIES OF SINGLE-PHASE HOMOGENEOUS SOL-GELSOF AL2O3 AND MGO FOR BASIC CATALYSTS, Materials letters, 32(5-6), 1997, pp. 325-334
Citations number
23
Categorie Soggetti
Material Science","Physics, Applied
Journal title
ISSN journal
0167577X
Volume
32
Issue
5-6
Year of publication
1997
Pages
325 - 334
Database
ISI
SICI code
0167-577X(1997)32:5-6<325:POACSO>2.0.ZU;2-W
Abstract
Homogeneous single phase sol-gels of magnesia and alumina were prepare d using magnesium and aluminum alkoxides as precursors. The gels were formed through a hydrolysis reactions followed by condensation. These materials behave as basic catalysts and, therefore, are superb anionic interchangers. The solids obtained were characterized by infrared spe ctroscopy, thermogravimetric analysis and anionic interchange tests. N o evidence for the presence of the individual binary oxides was found. An important effect on the dehydroxylation of the surface and on the anionic exchange was found as a function of alumina content in the mag nesia matrix. The best sample was the one containing 50% MgO-50% Al2O3 .