Supported Heteropolyacids as Heterogeneous Catalysts for Propene Metathesis

1995 ◽  
Vol 60 (3) ◽  
pp. 443-450 ◽  
Author(s):  
Pavol Hudec ◽  
Katarina Prandová
Keyword(s):  
Surface Properties ◽  
Silica Gel ◽  
Heterogeneous Catalysts ◽  
Keggin Type

Catalysts containing tungsten or molybdenum in the form of Keggin type heteropolyacids, like H3PW12O40, H4SiW12O40 and H3PMo12O40, supported on silica gel were prepared. The acid and surface properties of heteropolyacids and their supported forms are discussed. Keggin type heteropolyacids supported on silica gel have been found active for propene metathesis, the activity was compared with those of the classical catalyst WO3/SiO2. The highest activity and selectivity for studied reaction showed catalyst prepared on the base of H3PW12O40.

Ionic Liquid [Bmim]OH Grafted Catalyst for Cycloaddition of Carbon Dioxide

2014 ◽  
Vol 989-994 ◽  
pp. 676-679 ◽  
Author(s):  
Xue Lan Zhang ◽  
Deng Feng Wang
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Silica Gel ◽  
Propylene Carbonate ◽  
Propylene Oxide ◽  
Heterogeneous Catalysts ◽  
Element Analysis ◽  
Mild Conditions ◽  
Adsorption Desorption

An ionic liquid 1-butyl-3-methylimidazolium hydroxide ([Bmim]OH) was grafted on silica gel by post-grafting method. Such grafted ionic liquids (GILs) which were verified by means of FTIR, element analysis N2adsorption-desorption and TG could be used as highly effective heterogeneous catalysts toward propylene carbonate synthesis through cycloaddition of carbon dioxide with propylene oxide under solventless and mild conditions.

Preparation and Activity of Ionic Liquid Catalysts Grafted on Hydrophobic Silica Gel

2012 ◽  
Vol 476-478 ◽  
pp. 2621-2624
Author(s):  
Xue Lan Zhang ◽  
Deng Feng Wang
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Silica Gel ◽  
Propylene Oxide ◽  
Heterogeneous Catalysts ◽  
N2 Adsorption ◽  
Mild Conditions ◽  
Hydrophobic Silica ◽  
Adsorption Desorption

An ionic liquid 1- (triethoxysilyl) propyl-3-methylimidazolium hydroxide ([Smim]OH) was grafted on three kinds of mesoporous hydrophobic silica gel by means of post-grafting under mild conditions. The catalysts were [Smim]OH/SiO2-MTES (methyltriethoxysilane), [Smim]OH/SiO2-TMCS (trimethylchlorosilane), [Smim]OH/SiO2-CPTEO (triethoxysilyl propyl chloride). Such grafted ionic liquids (GILs), which were characterized by means of FTIR and N2 adsorption-desorption could be used as effective heterogeneous catalysts toward propylene carbonate synthesis through cycloaddition of carbon dioxide with propylene oxide under solventless and mild conditions.

Keggin-type lacunary and transition metal substituted polyoxometalates as heterogeneous catalysts: A recent progress

2016 ◽  
Vol 58 (3) ◽  
pp. 337-370 ◽  
Author(s):  
Anjali Patel ◽  
Nilesh Narkhede ◽  
Sukriti Singh ◽  
Soyeb Pathan
Keyword(s):  
Transition Metal ◽  
Heterogeneous Catalysts ◽  
Recent Progress ◽  
Keggin Type

Surface Properties of Mesoporous Carbon–Silica Gel Adsorbents

2000 ◽  
Vol 223 (1) ◽  
pp. 112-125 ◽  
Author(s):  
R. Leboda ◽  
V.V. Turov ◽  
B. Charmas ◽  
J. Skubiszewska-Zieba ◽  
V.M. Gun'ko
Keyword(s):  
Surface Properties ◽  
Silica Gel ◽  
Mesoporous Carbon

Effects of thermal treatment on the surface properties of a wide pore silica gel

1978 ◽  
Vol 24 (2) ◽  
pp. 383-390 ◽  
Author(s):  
R.Sh. Mikhail ◽  
A.M. Khalil ◽  
S. Nashed
Keyword(s):  
Thermal Treatment ◽  
Surface Properties ◽  
Silica Gel

Surface properties of silica gel samples modified by selected proteins

2006 ◽  
Vol 86 (1) ◽  
pp. 85-91 ◽  
Author(s):  
D. Sternik ◽  
P. Staszczuk ◽  
J. Pękalska ◽  
G. Grodzicka ◽  
B. Gawdzik ◽  
...  
Keyword(s):  
Surface Properties ◽  
Silica Gel
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