Comparison of different Lewis acid supported on hydroxyapatite as new catalysts of Friedel–Crafts alkylation

Sebti, Saı̈d M.; Tahir, Rachid; Nazih, Rachid; Boulaajaj, Saïd

doi:10.1016/s0926-860x(01)00599-3

Cited by 88 publications

(33 citation statements)

References 19 publications

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“…), benzyl chloride 0.32 g, catalyst 0.05 g, t = 45 min, T = 80°C a Ref. [12a], the reaction of benzene (3.9 g) with benzyl chloride (0.64 g) at the temperature of 80°C in 1 mL ionic liquid of BmimCl-FeCl 3 (the molar ratio of FeCl 3 to BmimCl is 2 (d & 1.48 g/cm 3 ), ionic liquid/benzyl chloride = 58.9 mol.%), t = 120 min, T = 80°C Such results agree well with the mechanism of carbenium ion involved in Friedel-Crafts alkylation reaction [21].…”

Section: Catalytic Testssupporting

confidence: 78%

Immobilized Chloroferrate Ionic Liquid: An Efficient and Reusable Catalyst for Synthesis of Diphenylmethane and its Derivatives

Wang

Lin

et al. 2008

Catal Lett

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Chloroferrate ionic liquid was immobilized on mesoporous silica of MCM-41 via a two-steps process involving the synthesis of 1-trimethoxysilylpropyl-3-methylimidazolium chloride-FeCl 3 and successively grafting it onto siliceous MCM-41. In comparison with the 1-butyl-3-methylimidazolium chloride-FeCl 3 (BmimClFeCl 3 ), the obtained catalyst showed much higher efficiency in Friedel-Crafts benzylation reaction. More importantly, such immobilized ionic liquid could be reused without significant loss of catalytic activity.

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Section: Catalytic Testssupporting

confidence: 78%

Immobilized Chloroferrate Ionic Liquid: An Efficient and Reusable Catalyst for Synthesis of Diphenylmethane and its Derivatives

Wang

Lin

et al. 2008

Catal Lett

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“…Owing to its unique acid-base properties, hydroxyapatite attracted much attention as solid catalyst more recently for various reactions such as dehydration and dehydrogenation of alcohols [8,9], oxidation of alkanes [10,11], Knoevenagel condensation [12], Friedel-Crafts alkylation [13], and Michael addition [14] and WGS reaction [15]. Hydroxyapatite is also used as a catalyst support for transition metal catalysts in various types of oxidation and carbon-carbon bond forming reactions [16].…”

Section: Introductionmentioning

confidence: 99%

Novel Silver Loaded Hydroxyapatite Catalyst for the Selective Catalytic Reduction of NOx by Propene

Kumar

Maddigapu

et al. 2008

Catal Lett

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A novel and high performance silver loaded hydroxyapatite (HAp) catalyst for the selective catalytic reduction (SCR) of NO x by propene is reported for the first time. The catalysts with variable silver contents have been prepared and characterized extensively by different techniques such as XRD, XPS, BET-surface area, TPR, TPD and ICP analyses. The DeNO x activities of these catalysts are measured at reaction temperature ranged from 250 to 500°C. The 1.5 wt.% Ag/HAp is found to be best among all the catalysts studied showing about 70% conversion and 60% selectivity towards N 2 formation at 375°C in oxygen rich atmosphere.

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“…The reaction is in the order o-xylene > toluene > benzene. Sebti et al [31] reported similar results over different Lewis acids supported on hydroxyapatite for benzylation reaction. The observed order of reactivity is exactly the same as the order of electron-releasing effect of the substituting group in the benzene ring.…”

Section: The Effect Of Substratementioning

confidence: 72%

Environmentally benign Friedel-Crafts benzylation over nano-TiO2/SO42-

2013

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During the past decade, much attention has been paid to the replacement of homogeneous catalysts by solid acid catalysts. Friedel-Crafts benzylation of toluene with benzyl chloride (BC) in liquid phase was carried out over highly active, nano-crystalline sulfated titania systems. These catalysts were prepared using the sol gel method. Modification was done by loading 3% of transition metal oxides over sulfated titania. Reaction parameters such as catalyst mass, molar ratio, temperature, and time have been studied. More than 80% conversion of benzyl chloride and 100% selectivity are shown by all the catalysts under optimum conditions. Catalytic activity is correlated with Lewis acidity obtained from perylene adsorption studies. The reaction appears to proceed by an electrophile, which involves the reaction of BC with the acidic titania catalyst. The catalyst was regenerated and reused up to four reaction cycles with equal efficiency as in the first run. The prepared systems are environmentally friendly and are easy to handle.

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Comparison of different Lewis acid supported on hydroxyapatite as new catalysts of Friedel–Crafts alkylation

Cited by 88 publications

References 19 publications

Immobilized Chloroferrate Ionic Liquid: An Efficient and Reusable Catalyst for Synthesis of Diphenylmethane and its Derivatives

Immobilized Chloroferrate Ionic Liquid: An Efficient and Reusable Catalyst for Synthesis of Diphenylmethane and its Derivatives

Novel Silver Loaded Hydroxyapatite Catalyst for the Selective Catalytic Reduction of NOx by Propene

Environmentally benign Friedel-Crafts benzylation over nano-TiO2/SO42-

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