Book ChapterDOI
Acidity dependence of isopropylation activity over zeolites of different structures and si/al ratios
Shankar Narayanan,Asima Sultana +1 more
Reads0
Chats0
TLDR
In this article, the effect of acidity on alkylation activity is discussed and H-mordenite was found to be the most acidic and active catalyst for alkylations of benzene with isopropyl alcohol.Abstract:
Vapour phase alkylation of benzene with isopropyl alcohol over HX, HY, HZSM-5 and H-mordenite is reported. The influence of temperature, mole ratio, feedrate and space velocity has been studied. The effect of acidity on alkylation activity is discussed. Among the different zeolites studied H-mordenite was found to be the most acidic and active catalyst for alkylation of benzene with isopropylalcohol. Zeolite HY and HZSM-5 possess same number of medium plus strong acid sites and show same level of conversion. Medium and strong acid sites play a role in alkylation reaction.read more
Citations
More filters
Journal ArticleDOI
Aniline alkylation over solid acid catalysts
TL;DR: In this article, a mechanism for aniline alkylation, with alcohol as alkylating agent, involving both the Bronsted and Lewis acid sites has been proposed.
Journal Article
Methylation of Aniline over Mn-Cu Ferrites Catalysts
TL;DR: In this article, the structural and catalytic properties of the mixed spinel ferrite system Mn1-xC uxFe2O4 (x = 0, 0.75, 1.2 h-1.0) have been investigated by X-Ray diffraction, Mossbauer spectra showed the presence of Fe 3+ a t both octahedral and tetrahedral sites.
References
More filters
Journal ArticleDOI
Mechanism of some conversions over ZSM-5 catalyst
TL;DR: In this article, it was suggested that the ZSM-5-catalyzed conversion of methanol to hydrocarbons involves electrophilic methylation of olefinic intermediates as the main propagation reaction for carbon-carbon bond formation.
Journal ArticleDOI
Periodic trends in the hydrodenitrogenation activity of carbon-supported transition metal sulfide catalysts
TL;DR: In this paper, the authors have chosen the HDN of quinoline at moderately high pressure as a model reaction, and they have used the same carbon-supported transition metal sulfide catalysts studied by Vissers et al.
Journal ArticleDOI
Benzene alkylation with ethylene and propylene over H-mordenite as catalyst
TL;DR: In this paper, it was shown that the catalytic selectivity of H-mordenite is due to the special pore structure of this zeolite, and that the catalyst exhibits optimum activity at an activation temperature of 450 °C. The relatively low apparent activation energy of 10 kcal/mole for the conversion to ethylbenzene was discussed.
Journal ArticleDOI
Alkylation of benzene with isopropanol over zeolite beta
TL;DR: In this article, the isopropylation of benzene with propene over Al-, B- and Ga-beta zeolites is reported and the influence of the SiO 2 /Al 2 O 3 ratio, space velocity, temperature and reactants mole ratios are discussed.
Journal ArticleDOI
Shape-selective reactions with zeolite catalysts: VI. Alkylation of benzene with propylene to produce cumene
TL;DR: In this paper, benzene was alkylated with propylene over HZSM-5 zeolite catalysts to produce cumene with 88-94% selectivity.