期刊
CATALYSIS TODAY
卷 107-08, 期 -, 页码 868-873出版社
ELSEVIER
DOI: 10.1016/j.cattod.2005.07.033
关键词
MCM-41; extraction; grafting; HS-MCM-41; HSO3-MCM-41
In this work, a systematic study of the acid extraction of the surfactant present in MCM-41 mesoporous materials was carried out. Two organic solvent/acid mixtures were used at various temperatures and for different periods of time. Propylthiol groups were subsequently grafted onto the surface by reacting the mesoporous silica with 3-mercaptopropyltrimethoxysilane. The resulting organic matter loading is compared with the one yielded by grafting of calcined samples. Acid catalysts were obtained by oxidation of the -SH groups to the -SO3H form. The catalysts were tested for alkylation of benzene with 1-dodecene. These materials were characterized by means of XRD, themogravimetric analysis, N-2 adsorption-desorption isotherms, organic elemental analysis and acid titration. The acid extraction of the surfactant allowed the preparation of catalysts with a high concentration of active centers. (c) 2005 Elsevier B.V. All rights reserved.
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