Acylation of aromatics over a HBEA zeolite. Effect of solvent and of acylating agent

Jayat, François; Picot, María José Sabater; Rohan, D.; Guisnet, M.

doi:10.1016/s0167-2991(97)80892-0

Cited by 9 publications

(2 citation statements)

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“…[27] Sulfolane is compatible with Lewis acid catalyzed alkylation,i nexpensive, solvates aromaticsw ell, hasahigh boiling point, and has been recommended as ac omparatively sustainable solvent. [28] It has been used in related Friedel-Crafts acylationr eactions with SbCl 5 ,T iCl 4 ,f luorides, fluoroborates, Nafion-silica composites, and zeolites as catalysts at temperatures up to 190 8C, [29][30][31][32][33][34][35][36] and in intramolecular Friedel-Crafts alkylationsa nd acylations with polyphosphoric acid as catalyst at reaction temperatures up to 130 8C. [37] Although sulfolane has been recommended in comparison with other solvents, its toxicityi sn ow under investigation.…”

Section: Resultsmentioning

confidence: 99%

Highly Porous Hypercrosslinked Polymers Derived from Biobased Molecules

Björnerbäck

Hedin

2019

ChemSusChem

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FredrikB jçrnerbäck andN iklas Hedin* [a] Highly porousa nd hyper-cross-linked polymers (HCPs) have a range of applications and are typicallys ynthesized in an unsustainable manner.H erein, HCPs were synthesized from abundant biobased or biorelatedc ompounds in sulfolane with iron(III) chloride as Lewis acid catalyst. As reactants, quercetin, tannic acid, phenol, 1,4-dimethoxybenzene, glucose, and a commercial bark extract wereu sed. The HCPs had high CO 2 uptake (up to 3.94 mmol g À1 at 0 8Ca nd 1bar), total pore volumes (up to 1.86 cm 3 g À1 ), and specific surfacea reas (up to 1440 m 2 g À1 ). 1 HNMR, 13 CNMR, and IR spectroscopy,w ideangle X-ray scattering, elementala nalysis, and SEM revealed, for example, that the HCPs consisted of amorphous and crosslinked aromatic and phenolic structures with significant contents of aliphatics, oxygen, and sulfur.[a] Dr.

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Section: Resultsmentioning

confidence: 99%

Highly Porous Hypercrosslinked Polymers Derived from Biobased Molecules

Björnerbäck

Hedin

2019

ChemSusChem

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“…Various three-dimensional solid acid catalysts such as mesoporous silica, − heteropolyacids, , H-MFI, H-FAU, H-BEA, − and H-MOR , have been extensively examined for catalytic activity studies on acylation of anisole under various ranges of process parameters in the batch reactor. Among the solid acid catalysts mentioned above, zeolite beta (BEA) is considered as a prominent catalyst for the acylation of anisole because of its divertive strong acidity originating from a structural framework constituted by two polymorphs and interconnecting channels with a high concentration of structural defects, − which provides a higher level of anisole conversion, and also its pore topology oriented toward the regioselective formation of 4-MAP. − Synthesis of organic compounds over solid acid catalysts often suffers from rapid catalytic deactivation because of their strong interaction with oxygenated products, dealumination, and trapping of heavier molecular weight products in micropores/mesopores or on the intercrystalline surfaces because of their diffusion limitation. ,,,− A deactivated catalyst always needs to undergo catalyst regeneration, which triggers an increase in the process economics and yield loss and imposes technical complexities.…”

Section: Introductionmentioning

confidence: 99%

Nanocrystallite Zeolite BEA for Regioselective and Continuous Acetyl Functionalization of Anisole Using Acetic Anhydride: Catalyst Deactivation Studies

Naresh,

Madhu Krushna,

Kondaiah

et al. 2023

ACS Omega

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Ultrasonic pretreatment of gel composition followed by hydrothermal synthesis produces the nanocrystallite zeolite beta (ZB) with crystal sizes of 10.3, 22.6, and 9.1 nm for ZB-1, ZB-2, and ZB-3, respectively. The effect of ultrasonic pretreatment and the (SiO2/Al2O3) ratio of gel composition on physical, textural properties, and also on the catalytic activity of ZB catalysts with increasing time on stream (TOS) was investigated. The specific surface area and mesopore volume for ZB-1, ZB-2, and ZB-3 are 438, 380, and 429 m2/g and 0.17, 0.05, and 0.14 cm3/g, respectively. The activity studies of ZB-1 and ZB-3 catalysts were confirmed that the anisole conversion initially increased with TOS until it attained the maximum value and then started decreasing further with TOS due to the deactivation of the catalyst caused by the strong interaction of the product with the acidic sites in the mesopore region. However, in the case of ZB-2, the anisole conversion (>45%) was sustained for a longer TOS due to its smaller particle size, low mesopore volume, and more acidic sites in the micropore volume that are inclusively made for retardation in the catlytic deactivation rate. The CHNS and TGA analysis of the spent catalysts confirm that ZB-1 and ZB-3 catalysts are susceptible for a significant coke formation attributed due to strong product retention in their large mesopore volume, which lead to the catalytic deactivation.

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Solid‐acid Catalysis: Rearrangement and Isomerization

Sheldon

Bekkum

2000

Fine Chemicals Through Heterogeneous Catalysis

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Acylation of aromatics over a HBEA zeolite. Effect of solvent and of acylating agent

Cited by 9 publications

References 5 publications

Highly Porous Hypercrosslinked Polymers Derived from Biobased Molecules

Highly Porous Hypercrosslinked Polymers Derived from Biobased Molecules

Nanocrystallite Zeolite BEA for Regioselective and Continuous Acetyl Functionalization of Anisole Using Acetic Anhydride: Catalyst Deactivation Studies

Solid‐acid Catalysis: Rearrangement and Isomerization

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