Silica gel-based adsorbents prepared via homogeneous and heterogeneous routes: adsorption properties and recycling as heterogeneous catalysts

2017 ◽  
Vol 66 (12) ◽  
pp. 1913-1920 ◽  
Author(s):  
Jin Meng ◽  
Fu Rao ◽  
Sun Changmei ◽  
Qu Rongjun ◽  
Zhang Ying
Keyword(s):  
Silica Gel ◽  
Heterogeneous Catalysts ◽  
Adsorption Properties

Adsorption Properties of Mesoporous Silica Gel with β-Cyclodextrin as a Pore-Forming Agent Relative to Moxifloxacin

2018 ◽  
Vol 73 (4) ◽  
pp. 192-198
Author(s):  
A. A. Skuredina ◽  
M. R. Danilov ◽  
I. M. Le-Deygen ◽  
E. V. Kudryashova
Keyword(s):  
Mesoporous Silica ◽  
Silica Gel ◽  
Adsorption Properties ◽  
Mesoporous Silica Gel

scholarly journals The Prospective Approach for the Reduction of Fluoride Ions Mobility in Industrial Waste by Creating Products of Commercial Value

2019 ◽  
Vol 11 (3) ◽  
pp. 634 ◽  
Author(s):  
Valdas Rudelis ◽  
Tadas Dambrauskas ◽  
Agne Grineviciene ◽  
Kestutis Baltakys
Keyword(s):  
Liquid Medium ◽  
Silica Gel ◽  
Reaction Temperature ◽  
Industrial Waste ◽  
Adsorption Properties ◽  
Raw Material ◽  
Fluoride Ions ◽  
Dynamic Conditions ◽  
Stable Compound ◽  
Silica Gel Waste

In this work, we present the possibility to reduce the amount of fluoride ions in silica gelwaste by using different techniques or to immobilize these ions by creating products ofcommercial value. The leaching of fluoride ions from silica gel waste to the liquid medium wasdone under static and dynamic conditions. It was determined that the removal of fluoride ionsfrom this compound depends on various factors, such as dissociation, solubility, the w/s ratio,reaction temperature, leaching conditions, the adsorption properties of silica gel waste, and others.The obtained results showed that, by applying different techniques, the quantity of fluoride ionscan be reduced by 60%, while obtained water was neutralized by calcium hydroxide.Additionally, it was determined that silica gel waste is a promising raw material for thehydrothermal synthesis of a stable compound containing fluoride ions – cuspidine.

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.

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.

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.

Adsorption Properties of N2O on Zeolite 5A, 13X, Activated Carbon, ZSM-5, and Silica Gel

2019 ◽  
Vol 64 (8) ◽  
pp. 3473-3482 ◽  
Author(s):  
Tongbo Wu ◽  
Yuanhui Shen ◽  
Li Feng ◽  
Zhongli Tang ◽  
Donghui Zhang
Keyword(s):  
Activated Carbon ◽  
Silica Gel ◽  
Adsorption Properties ◽  
Zeolite 5A
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