Toluene disproportionation catalysed by various zeolites

Beltrame, P.; Beltrame, Pier Luigi; Carniti, P.; Forni, L.; Zuretti, Giovanni

doi:10.1016/0144-2449(85)90134-4

Cited by 24 publications

(40 citation statements)

References 17 publications

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“…The toluene conversion by the acid zeolite alone is less than 50%, with a product distribution that corresponds to the disproportionation of toluene to give C6's (includes benzene) and xylenes. Similar results have been reported previously for H-ZSM-5 at temperatures above 400°C [25][26][27][28].…”

Section: Catalytic Testing Resultssupporting

confidence: 92%

High Performance Ni Based Catalyst for Toluene Hydrocracking

et al. 2009

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The one step hydrocracking of toluene to n-paraffins was successfully carried out using a Ni-based bifunctional catalyst supported on H-ZSM-5 zeolite. Two methods of catalyst preparation were compared and a quantifiable difference in selectivity was identified depending on the preparation method. Additionally, a high C 2? n-alkane selectivity of *75% was obtained with both catalysts, which is comparable to previous work using Pd. Both catalysts generated a toluene conversion of 100%.

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Section: Catalytic Testing Resultssupporting

confidence: 92%

High Performance Ni Based Catalyst for Toluene Hydrocracking

et al. 2009

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“…Addition of higher amounts of La 2 O 3 results in a decrease in the active acid sites on the external surface as well as blockage of the ZSM5 pores. The deposition of the modifier within the ZSM5 channels and/or at the pore mouth induces an increased diffusive resistance which favours p-xylene formation [29]. The p-xylene formed has the lowest kinetic diameter and diffuses out faster than the other two isomers.…”

Section: Reaction Studies With Zsm5 Coated Monolithsmentioning

confidence: 99%

Disproportionation of Toluene on Monoliths Washcoated with Metal Oxide Modified ZSM5

Mitra

Kunzru

2011

Catal Lett

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Monoliths washcoated with ZSM5 and metal oxide (MgO, CaO, La 2 O 3 or CeO 2 ) modified ZSM5 were prepared, characterized and studied for toluene disproportionation. An improvement in the yield of the desired p-xylene isomer was obtained by using monoliths coated with metal oxide-modified ZSM5. The enhancement in p-xylene yield depended on the type of modifier, metal loading and the washcoat thickness on the monolith. The 10% LaZSM5 coated monolith having an average washcoat thickness of 23 lm showed the highest p-xylene yield.

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“…The PEA concentration was varied adding small quantities of PEA (50 lL, 0.15 M) to the recirculating solution. Details on the method and operative conditions have been given elsewhere [48][49][50]. The collected data allowed to draw adsorption isotherms.…”

Section: Materials and Characterizationmentioning

confidence: 99%

“…Particles between 25 and 35 mesh, obtained as reported in Ref. [49], were used for the catalytic tests.…”

Section: Materials and Characterizationmentioning

confidence: 99%

Direct Green Iodination of Phenol over Solid Acids

2010

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Examination of several solid acid catalysts of different nature (acid resins, zeolites, mixed oxides, Nboxide, and Nb-phosphate) was performed for the direct iodination reaction of phenol by using molecular iodine. The experiments were carried out in mild and green conditions (50°C at ambient pressure) in methanol in the presence of H 2 O 2 as oxidant agent. Iodine was introduced in reduced amount, stoichiometric for the formation of diiodinated phenol, to obtain information on the regioselectivity of the iodination reaction. The catalysts proved to be all efficient for the introduction of iodine into the aromatic substrate, yielding mono-, di-, and tri-iodo derivates. Different selectivity distributions to the iodo-compound formed were observed over the different catalysts. Catalysts could be grouped into distinct families on the basis of their ortho/para orientation.

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Toluene disproportionation catalysed by various zeolites

Cited by 24 publications

References 17 publications

High Performance Ni Based Catalyst for Toluene Hydrocracking

High Performance Ni Based Catalyst for Toluene Hydrocracking

Disproportionation of Toluene on Monoliths Washcoated with Metal Oxide Modified ZSM5

Direct Green Iodination of Phenol over Solid Acids

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