Journal ArticleDOI
Tertiary butylation of phenol over mesoporous H–FeMCM-41
Reads0
Chats0
TLDR
Trivalent-iron-substituted mesoporous molecular sieve catalysts (FeMCM-41) were synthesized hydrothermally and characterized systematically by various analytical and spectroscopic techniques as mentioned in this paper.Abstract:
Trivalent-iron-substituted mesoporous molecular sieve catalysts (FeMCM-41) were synthesized hydrothermally and characterized systematically by various analytical and spectroscopic techniques. Temperature-programmed desorption studies of ammonia of the protonated catalyst (H–FeMCM-41) indicate a broad distribution of the acid sites. Vapour-phase alkylation of phenol with t-butyl alcohol (2-methyl-2-propanol) was carried out over this solid acid catalyst and p-t-butyl phenol was obtained as the major product with high selectivity.read more
Citations
More filters
Journal ArticleDOI
Recent advances in processing and characterization of periodic mesoporous MCM-41 silicate molecular sieves
TL;DR: A critical review of the developments in these areas with particular emphasis on adsorption characteristics, progress in controlling the pore sizes, and a comparison of pore size distributions using traditional and newer models is provided in this article.
Journal ArticleDOI
Perspectives in catalytic applications of mesostructured materials
TL;DR: In this paper, a review paper deals with proven and potential applications of mesoporous molecular sieves in catalysis, and is divided into two parts, respectively, dedicated to the design of solid catalysts and catalyst supports and to some relevant examples of catalytic processes.
Journal ArticleDOI
para-Selective t-butylation of phenol over mesoporous H-AlMCM-41
TL;DR: In this article, a vapour phase alkylation of phenol with t-butyl alcohol (2-methyl-2-propanol) was carried out over mesoporous H-AlMCM-41 in the temperature range 448−498 K.
Journal ArticleDOI
The influence of aluminium sources on the acidic behaviour as well as on the catalytic activity of mesoporous H-AlMCM-41 molecular sieves
TL;DR: A series of mesoporous molecular sieves (AlMCM-41) were synthesized with varying silicon-to-aluminium ratios and using three different aluminium sources, viz., sodium aluminate, aluminium isopropoxide and aluminium sulphate as discussed by the authors.
Journal ArticleDOI
Regio- and Chemoselective Catalytic Transfer Hydrogenation of Aromatic Nitro and Carbonyl as Well as Reductive Cleavage of Azo Compounds over Novel Mesoporous NiMCM-41 Molecular Sieves
TL;DR: Regio- and chemoselective reduction of nitroarenes and carbonyl compounds and reductive cleavage of azo compounds, including bulkier molecules, was achieved by the catalytic transfer hydrogenation method (CTH) using a novel nickel-containing mesoporous silicate (NiMCM-41) molecular sieve catalyst.
References
More filters
Book
Molecular Sieves: Principles of Synthesis and Identification
TL;DR: A detailed survey of Zeolite and molecular sieve structures and compositions can be found in this paper, where the authors present an X-ray powder data for Zeolites and Molecular Sieve Structures and Compositions.
Journal ArticleDOI
Structure and reactivity of framework and extraframework iron in Fe-silicalite as investigated by spectroscopic and physicochemical methods
Silvia Bordiga,R. Buzzoni,Francesco Geobaldo,Carlo Lamberti,Elio Giamello,A. Zecchina,Giuseppe Leofanti,Guido Petrini,G. Tozzola,G. Vlaic +9 more
TL;DR: In this article, the application of IR, Raman, UV-visible, EPR, XANES, EXAFS, and TPR techniques to the determination of the Fe 3+ local environment in Fe-silicalite is described and discussed.
Journal ArticleDOI
Note on the Paramagnetic Resonance of Iron in Glass
TL;DR: In this article, a theory is proposed explaining the observed g value and the implications for the atomic surroundings of Fe++ + + are discussed, and it is also proposed that the g=6 resonance observed in glass by Sands is due to Fe+ ++ + plus.
Journal ArticleDOI
Characterization of Iron in Zeolites by X-band and Q-Band ESR, Pulsed ESR, and UV-Visible Spectroscopies
Journal ArticleDOI
Mesoporous redox molecular sieves analogous to MCM-41
TL;DR: In this paper, the MCM-41 analogue mesoporous metallosilicates with high specific surfaces, containing the redox active metals Ti, V, Cr, Mn, Fe, or Co, were synthesized under reflux.