An improved methodology for adsorption characterization of unmodified and modified silica gels

2003 ◽  
Vol 266 (1) ◽  
pp. 168-174 ◽  
Author(s):  
J. Choma ◽  
M. Kloske ◽  
M. Jaroniec
Keyword(s):  
Silica Gels ◽  
Modified Silica ◽  
Modified Silica Gels

Chromatographic characterization of surface-modified silica gels

1973 ◽  
Vol 87 (1) ◽  
pp. 35-48 ◽  
Author(s):  
Shubhender Kapila ◽  
Walter A. Aue ◽  
Joseph M. Augl
Keyword(s):  
Silica Gels ◽  
Modified Silica ◽  
Chromatographic Characterization ◽  
Surface Modified ◽  
Modified Silica Gels

Structural Characterization of Gels Prepared from Co-Hydrolysis of Tetraethoxysilane and Dimethyldiethoxysilane.

1992 ◽  
Vol 271 ◽  
Author(s):  
Florence Babonneau ◽  
Laurence Bois ◽  
Jacques Livage
Keyword(s):  
Structural Characterization ◽  
Silica Gels ◽  
Condensation Process ◽  
Modified Silica ◽  
Polymeric Gels ◽  
Organically Modified ◽  
Organically Modified Silica ◽  
Hydrolysis Of ◽  
Modified Silica Gels

ABSTRACTThis work is part of a more general study on the structural characterization of organically modified silica gels that are usually prepared from tetrafunctional, trifunctional and difunctional alkoxides. The systems that were investigated in this paper are gels prepared from co-hydrolysis of dimethyldiethoxysilane (DEDMS) and tetraethoxysilane (TEOS). The condensation process was followed by 29Si and 17O liquid NMR and shows clearly evidence for co-condensation reactions. Gels with various DEDMS/TEOS ratios were studied by 29Si and 1H MAS-NMR. The results are clearly correlated to the change in physical properties of the materials, from flexible polymeric gels at high DEDMS content to crosslinked brittle networks at low DEDMS content.

ChemInform Abstract: New Ionic Liquid-Modified Silica Gels as Recyclable Materials for L-Proline- or H-Pro-Pro-Asp-NH2-Catalyzed Aldol Reaction.

ChemInform ◽  
2008 ◽  
Vol 39 (16) ◽  
Author(s):  
Carmela Aprile ◽  
Francesco Giacalone ◽  
Michelangelo Gruttadauria ◽  
Adriana Mossuto Marculescu ◽  
Renato Noto ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Aldol Reaction ◽  
Silica Gels ◽  
Modified Silica ◽  
Modified Silica Gels

Catalytic Activity of Alumina-Modified Silica Gels in Methanol Conversion to Dimethyl Ether

2021 ◽  
Vol 94 (5) ◽  
pp. 576-585
Author(s):  
Z. A. Temerdashev ◽  
A. S. Kostina ◽  
A. V. Rudenko ◽  
I. A. Kolychev ◽  
A. M. Vasil’ev
Keyword(s):  
Catalytic Activity ◽  
Dimethyl Ether ◽  
Methanol Conversion ◽  
Silica Gels ◽  
Modified Silica ◽  
Modified Silica Gels
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