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Journal of the Mexican Chemical Society

versão impressa ISSN 1870-249X

Resumo

ANGELES-BELTRAN, Deyanira et al. Titanium-modified MCM-41 Prepared by Ultrasound and by Hydrothermal Treatment, Catalysts for Acetylation Reactions. J. Mex. Chem. Soc [online]. 2008, vol.52, n.3, pp.175-180. ISSN 1870-249X.

Mesoporous materials type Ti-MCM-41 prepared by hydrothermal and ultrasound-assisted techniques were characterized by XRD, SEM, TEM, nitrogen physisorption, ammonia TPD, UV-vis and FT-IR. Both showed the MCM-41 characteristic structure. Hydrothermal treatment allowed obtaining a well ordered material and ultrasound procedure gave a better titanium distribution. Electronic microscopy images revealed Ti dispersion zones as well as the quantity of metal in the structure. The catalytic activity of these materials were tested by acetylation of aromatic and steroidal alcohols to afford the corresponding esters in good yields.

Palavras-chave : Ti-MCM-41; ultrasound technique; hydrothermal technique; mesoporous materials; acetylation.

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