New synthesis route of hydrocalumite-type materials and their application as basic catalysts for aldol condensation

被引：27

作者：

Cota, Iuliana ^{[2
]}

Ramirez, Eliana ^{[2
]}

Medina, Francisco ^{[2
]}

Sueiras, Jesus E. ^{[2
]}

Layrac, Geraldine ^{[1
]}

Tichit, Didier ^{[1
]}

机构：

[1] Ecole Natl Super Chim Montpellier, Inst Charles Gerhardt, ENSCM, CNRS,UMR 5253,UM2,UM1, F-34296 Montpellier 5, France

[2] Univ Rovira & Virgili, Escola Tecn Super Engn Quim, Tarragona 43007, Spain

来源：

APPLIED CLAY SCIENCE | 2010年 / 50卷 / 04期

关键词：

Hydrocalumite; Layered double hydroxide; Aldolisation; Bronsted catalysts; FRIEDELS SALT; POLYMER DERIVATIVES; THERMAL-BEHAVIOR; MG; HYDROTALCITES; KATOITE;

D O I：

10.1016/j.clay.2010.09.019

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An attempt was made to directly synthesize a Bronsted-type catalyst based on the hydrocalumite-like structure by controlled hydrolysis of calcium and aluminium alkoxides Solids belonging to the AFm and hydrogrossular families were obtained by dissolution of calcium methoxide and aluminium triethoxide precursors in water at a molar ratio [Ca2+]/[Al3+] = 20 followed by an aging of the precipitate at different temperatures At 273 K. a mixture of gibbsite layered hydrocalumite-like phase and 3 dimensional cubic Si-free katoite compounds was obtained At 298 K the XRD pattern reveals the presence of hydrocalumite-like phases intercalated by OH- and CO32- species respectively as confirmed by IR spectroscopy This as-prepared sample behaved as an efficient Bronsted-type catalyst able to perform the condensation reaction of benzaldehyde and acetone into benzylideneacetone At 333 K the catalytically inactive katoite phase alone was formed (C) 2010 Elsevier B V All rights reserved

引用

页码：498 / 502

页数：5

共 36 条

[1] Aldol condensations over reconstructed Mg-Al hydrotalcites:: Structure-activity relationships related to the rehydration method [J].