Selective benzoylation of biphenyl to 4-phenylbenzophenone over zeolite H-beta

Chidambaram, Mandan; Venkatesan, C.; Moreaub, P; Finiels, Annie; Ramaswamy, A.V.; Singh, Anand

doi:10.1016/s0926-860x(01)00781-5

Cited by 21 publications

(16 citation statements)

References 23 publications

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“…omethoxybenzophenone and ester were formed in almost equal concentrations and represented less than 4% of the total reac- tion products. The observed results are in good agreement with those reported by different authors in the literature [30]. Previous catalytic tests performed in our group with BEA zeolites synthesized in the same conditions but presenting Si/Al ratios between 12.5 and 100 have shown that, for the benzoylation of anisole, the acidity of the zeolite has neither influence on the conversion nor on the deactivation rate [31].…”

Section: Catalytic Activitysupporting

confidence: 92%

Beta zeolite supported on a β-SiC foam monolith: A diffusionless catalyst for fixed-bed Friedel–Crafts reactions

Winé

Tessonnier

Rigolet

et al. 2006

Journal of Molecular Catalysis A: Chemical

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Section: Catalytic Activitysupporting

confidence: 92%

Beta zeolite supported on a β-SiC foam monolith: A diffusionless catalyst for fixed-bed Friedel–Crafts reactions

Winé

Tessonnier

Rigolet

et al. 2006

Journal of Molecular Catalysis A: Chemical

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“…21 The resulted NH 4 + type zeolite was further converted to H + type by calcination in air at 550 C for 6 h. 21 The resulted NH 4 + type zeolite was further converted to H + type by calcination in air at 550 C for 6 h.…”

Section: Treatment Of the Support (Hb)mentioning

confidence: 99%

Efficient synthesis of biodiesel over a recyclable catalyst comprising a monolacunary silicotungstate and zeolite Hβ

Narkhede

Patel

2014

RSC Adv.

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This paper presents a study of esterification of oleic acid as well as transesterification of soybean oil with methanol over a solid acid catalyst comprising a monolacunary silicotungstate anchored to zeolite Hb.The optimization of the reaction parameters were carried out to get the maximum conversion. The 3.5 wt% catalyst charge at 60 C showed 82% conversion of oleic acid with a 1 : 20 mole ratio of acid to alcohol in 10 h whereas the 4 wt% catalyst charge at 65 C showed 96% conversion of soybean oil with a ratio of oil to alcohol of 1 : 4 (w/w) in 8 h. The catalyst was found to be readily reusable and exhibited consistency in activity upon reuse four times without appreciable loss in the conversion.

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“…Among the various types of zeolites, beta, Y, mordenite, MCM-22 and ZSM-5 are widely used catalysts for Friedel-Crafts acylation reactions [7][8][9][10][11][12][13][14]. It is reported that, the activity of zeolite in the liquid-phase acylations largely depends on their structural features and the activity increases from medium to large pore and from mono to three dimensional channel systems [7].…”

Section: Catalysis By Zeolitesmentioning

confidence: 99%

“…Because of the above advantages, major research efforts have been directed toward the development of shape selective solid catalyst for the synthesis of acylated aromatics over the past decade. A number of heterogeneous catalysts based on zeolites [7][8][9][10][11][12][13][14], metal oxides + R-CO-X H CO -R (Z) p (Z) p Catalyst + HX q Dedicated to Professor Seitaro Namba on the occasion of his 64th birthday. *To whom correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Advances in liquid-phase Friedel-Crafts acylation of aromatics catalyzed by heterogeneous solids

Jana

2006

Catal Surv Asia

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In the last few decades, significant improvements toward the development of environmentally benign processes have been achieved in the liquid-phase Friedel-Crafts acylation reactions. Many efforts have been devoted to the research on solid catalysts adequate to substitute homogeneous protonic acids or Lewis acids as traditionally employed catalysts in the acid-catalyzed FriedelCrafts acylation processes. This short article describes the recent developments on catalysis by gallium (Ga), indium (In) and thallium (Tl) based novel heterogeneous solids for the liquid-phase Friedel-Crafts acylation of aromatics by acyl halide. The above heterogeneous catalysts are efficient for Friedel-Crafts acylation reaction and exhibited superior activity than the traditionally employed strongly acidic solid catalysts. Unlike conventional acidic catalyst, the acylation activity of Ga, In and Tl based solids, additionally having redox functions, does not depend solely on their acidic properties, even present. These solids in their non-acidic or basic form also show high acylation activity. Based on the catalytic results over these novel solids a plausible reaction mechanism for the acylation is proposed.

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Selective benzoylation of biphenyl to 4-phenylbenzophenone over zeolite H-beta

Cited by 21 publications

References 23 publications

Beta zeolite supported on a β-SiC foam monolith: A diffusionless catalyst for fixed-bed Friedel–Crafts reactions

Beta zeolite supported on a β-SiC foam monolith: A diffusionless catalyst for fixed-bed Friedel–Crafts reactions

Efficient synthesis of biodiesel over a recyclable catalyst comprising a monolacunary silicotungstate and zeolite Hβ

Advances in liquid-phase Friedel-Crafts acylation of aromatics catalyzed by heterogeneous solids

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