Silica supported
Silica-supported HClO4 and KHSO4 as reusable green catalysts for sulfonation of aromatic compounds under solvent-free conditions
... mm silica gel 60 F-254 plates. Merck silica gel 60 (230-400 mesh) was used to perform Column ...of Silica supported catalysts (SiO 2 /KHSO 4 and SiO 2 /HClO 4 ) is the same as reported in our ...
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Silica supported-boron sulfonic acid: a versatile and reusable catalyst for synthesis of bis(indolyl)methane in solvent free and room temperature conditions
... also Silica Boron Sulfonic Acid were used as catalyst in Similar multi-component reactions (MCRs) ...using silica supported-boron sulfonic acid as a new and versatile and reusable catalyst at solvent ...
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Synthesis and Characterization of Tetrasubstitued Imidazole by Using Silica Supported Catalysis
... Our synthetic journey started with the commercially available diphenylacetylne (1a), substituted aldehydes (1b) and aromatic amines or aliphatic amines (1c). The first step was to oxidize alkyne by using formic acid in ...
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Time Resolved XANES Studies on Used Silica Supported Cobalt Catalysts
... used silica supported cobalt catalyst was investigated using the temperature programmed oxidation (TPO) technique (TPDO/MS 1100 at The Petroleum And Petrochemical College, Chulalongkorn University, Bangkok, ...
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Silica Supported Titania–Zirconia Nanocomposites: Structural and Morphological Characteristics in Different Media
... In the present study, highly disperse silica-supported titania–zirconia nanocomposites were synthesized by a liquid-phase method. The samples were examined using a set of techniques after their calcination ...
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The use of Silica Supported Nickel-Copper Oxide Catalyst for Photodegradation of Methylene Blue
... Photodegradation is a safe and low cost methods to clean water bodies from some organic pollutants. The method has been developed in term of increasing the efficiency of the degradation capacity of photocatalyst. The ...
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Direct and practical synthesis of 2 Arylbenzoxazoles promoted by Silica supported sodium hydrogen sulphate
... that Silica supported sodium hydrogen sulphate is highly efficient catalyst 20-24 for synthesis of substituted benzoxazoles through the reaction of aldehydes and 2-amino phenols under reflux in dioxane ...
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Synthesis and characterization of tetraazamacrocyclic complexes using silica supported perchloric acid (HClO4:SiO2) as catalyst
... metal salts. Chandra et al. [12] have reported synthesis of macrocyclic complexes using condensation reaction of ethylenediamine and glyoxal in presence of chloride salts of transition metal ions using traditional reflux ...
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Dependence of Spectroscopic Properties of Copper Oxide Based Silica Supported Nanostructure on Temperature
... Cu-doped silica gels in the form of xerogels, coatings and powders have been extensively studied ...porous silica gels treated at different temperatures have also been studied ...
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Investigation of Hexagonal Mesoporous Silica Supported Composites for Trace Moisture Adsorption
... on the corresponding calcined silica. They deduced the layer of surface alkyl chains that played an important role in enhancing the dispersion of PEI and decreasing the diffusion resistance. Kuwahara et al. [25] ...
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Silica-Supported Silver Nitrate as a Highly Active Dearomatizing Spirocyclization Catalyst : Synergistic Alkyne Activation by Silver Nanoparticles and Silica
... the supported reagent. This was confirmed by TEM imaging of the supported catalyst; crystalline Ag-NPs were observed (Figure 4) and the electron diffraction pattern enabled the identification of a cubic ...
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IN SITU SILICA SUPPORTED METALLOCENE CATALYSTS FOR ETHYLENE POLYMERIZATION
... The results presented in Table 2 show the dependence of polymerization behavior on reaction temperature and monomer concentra- tion. The low activities at temperatures above 60 °C can be attributed to the increase of ...
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Silica-Supported Palladium-Based Catalysts for Clean Synthesis102-110
... imise this problem, we have thoroughly pretreated our catalysts to remove any loosely bound physisorbed salts or complexes. Additionally, the ligand system should be capable o[r] ...
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Hydroconversion of Furfural over Cu-Cr/SiO2 Nanocatalysts: A Comparative Study
... nano-sized silica-supported catalyst without chromium promoter was more efficient than that on the bulk-type silica particularly in terms of FF conversion and FFA ...the ...
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Synthesis And Characterization Of Organic Silicates Using Appropriate Catalysts
... using silica or alumina supported copper oxide ...novel silica and alumina supported copper oxide catalysts for this reaction shows that silica supported copper oxide and alumina ...
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The use of Copper Oxides Supported Onto Biogenic Silica from the Leaves of Dendrocalamus Asper for Degradation of Congo Red
... A combination of SEM and EDX methods were used to establish the distribution of Cu in the biogenic silica supported samples. The SEM micrographs of CuOx@SiO 2 (CuOx=0.00%, 0.25% and 0.50%) are depicted in ...
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Silica gel Supported Boric tri-Sulfuric Anhydride (SiO2-BTSA): an Efficient Catalytic System for the Synthesis of Phloroglucide analogs as Antimicrobial Agents
... excellent chemical synthesis of materials (1). For example, applications of solid acids have been extensively studied and have been revealed to be highly efficient catalysts in organic synthesis (2). These catalysts ...
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Vapor Phase Decarbonylation of Furfural to Furan over Nickel Supported on SBA 15 Silica Catalysts
... Therefore, one of the goals of this study was to find a catalyst that was able to produce furan while suppress- ing the formation of alcohol furfuryl. In the present work, we have investigated the conversion of furfural ...
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Influence of Mesoporous Silica Properties on Cyclic Carbonate Synthesis Catalysed by Supported Aluminium(Salen) Complexes
... mesoporous silica-supported complex was tested as a catalyst for the conversion of various epoxides into their corresponding cyclic ...(of supported bimetallic aluminium-complex) of each catalyst ...
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Monoestolides Synthesis From Ricinoleic-Oleic Acids Using Silicotungstic Acid Sol-Gel Catalyst
... Sol-gel silica-supported hydrated silicotungstic acid (STA sol-gel), prepared by incorporating hydrated silicotungstic acid (STA) into silica via sol-gel technique, was used as an efficient ...
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