fulltext.study @t Gmail

Grafted non-ordered niobium-silica materials: Versatile catalysts for the selective epoxidation of various unsaturated fine chemicals

Paper ID Volume ID Publish Year Pages File Format Full-Text
54676 47020 2014 9 PDF Available
Title
Grafted non-ordered niobium-silica materials: Versatile catalysts for the selective epoxidation of various unsaturated fine chemicals
Abstract

•Mesoporous Nb(V)-silica catalysts prepared via dry impregnation or grafting technique.•Used as catalysts with aqueous H2O2 for the epoxidation of unsaturated terpenes.•Robust in the presence of water and versatile with various alkene substrates.•High yields (up to 73%) and excellent selectivities to epoxides (up to 98%).

Two kinds of niobium(V)-silica catalysts for the selective epoxidation were synthesised by post-synthesis modification of non-ordered mesoporous silica supports, starting from niobocene dichloride via solvent-less organometallic precursor dry impregnation or conventional liquid-phase grafting technique. Grafted Nb/SiO2 solids were used as catalysts, in the presence of aqueous H2O2, for the epoxidation of unsaturated cyclic and terpenic compounds of interest for fine and specialty chemistry, in particular: cyclohexene, 1-methylcyclohexene, limonene, carveol, α-terpineol, isopulegol, carvotanacetol, carvone, as well as squalene and isopulegyl acetate. These catalysts showed high yields (up to 73%) and excellent chemoselectivities to the desired epoxides (up to 98%), also in short reaction times (down to 1 h).

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (130 K)Download as PowerPoint slide

Keywords
Sustainable epoxidation; Hydrogen peroxide; Heterogeneous catalyst; Niobium-silica catalyst; Grafted catalyst; Unsaturated terpenes
First Page Preview
Grafted non-ordered niobium-silica materials: Versatile catalysts for the selective epoxidation of various unsaturated fine chemicals
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 235, 15 October 2014, Pages 49–57
Authors
, , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us