Role of Lewis and Brønsted acid sites in resorcinol <i>tert</i>-butylation over heteropolyacid-based catalysts

Pezzotta, Chiara; Marakatti, Vijaykumar S.; Gaigneaux, Éric M.

doi:10.1039/d0cy01030h

Cited by 4 publications

(2 citation statements)

References 35 publications

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“…Solid acid catalysts composed of transition metals have in their structure groups of atoms called Bronsted bases or Lewis acids [12] . According to Tao et al [13] , the acid and base sites present on the catalyst surface directly affect the synthesis of biodiesel.…”

Section: Introductionmentioning

confidence: 99%

Copper molybdate synthesized by sonochemistry route at room temperature as an efficient solid catalyst for esterification of oleic acid

Silva

Nobre

Freitas

et al. 2021

Ultrasonics Sonochemistry

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Highlights Easy obtention of Cu 3 (MoO 4 ) 2 (OH) 2 by sonochemistry route at room temperature. Urchin-like morphology was obtained in aqueous solution using the sonochemistry method for copper molybdate. High conversion rate in the esterification of oleic acid using the Cu 3 (MoO 4 ) 2 (OH) 2 as a solid catalyst.

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Section: Introductionmentioning

confidence: 99%

Copper molybdate synthesized by sonochemistry route at room temperature as an efficient solid catalyst for esterification of oleic acid

Silva

Nobre

Freitas

et al. 2021

Ultrasonics Sonochemistry

View full text Add to dashboard Cite

show abstract

“…5). Decomposition of the Keggin-ion starts over 460 °C, therefore the temperature region above it cannot be taken into consideration [65].…”

Section: Synthesis and Characterization Of The Catalystsmentioning

confidence: 99%

Continuous Flow Friedel–Crafts Alkylation Catalyzed by Silica Supported Phosphotungstic Acid: An Environmentally Benign Process

et al. 2021

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Six silica-supported phosphotungstic acid catalysts (PTA/SiO2) of different composition (20–70 wt% PTA content) have been synthesized and characterized by elemental analysis, BET, BJH, NH3-TPD methods, FT-IR spectroscopy of adsorbed pyridine and 1H MAS NMR techniques. The new composite catalysts were first applied in the Friedel–Crafts alkylation of toluene with 1-octene as a benchmark process under batch conditions in order to screen their activity and recyclability. The combined analytical techniques together with the catalytic studies enabled the identification of the main factors affecting the activity of the catalysts. Based on these preliminary experiments, the best performing catalyst system (50 wt% PTA/SiO2) was investigated in continuous flow mode using an in-house-made flow reactor. The thorough screening of the reaction conditions (temperature, toluene/1-octene molar ratio and flow rate) provided firm evidence that the 50 wt% PTA/SiO2 composite is highly active, selective and stable catalyst under mild reaction conditions even at elevated flow rate. Additionally, the catalyst used in the flow mode could successfully be regenerated and reused in the alkylation process.

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Polyoxymethylene dimethyl ethers synthesis from methanol and formaldehyde solution over one-pot synthesized spherical mesoporous sulfated zirconia

Wang

et al. 2022

Chinese Journal of Chemical Engineering

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Role of Lewis and Brønsted acid sites in resorcinol tert-butylation over heteropolyacid-based catalysts

Abstract: Investigating Keggin heteropolyacid embedded in SiO2, TiO2 and ZrO2 showed that both Brønsted (B) and Lewis (L) acid sites are needed to achieve the alkylation of resorcinol with MTBE. An optimum B to L site ratio allows maximizing the performance.

Cited by 4 publications

References 35 publications

Copper molybdate synthesized by sonochemistry route at room temperature as an efficient solid catalyst for esterification of oleic acid

Copper molybdate synthesized by sonochemistry route at room temperature as an efficient solid catalyst for esterification of oleic acid

Continuous Flow Friedel–Crafts Alkylation Catalyzed by Silica Supported Phosphotungstic Acid: An Environmentally Benign Process

Polyoxymethylene dimethyl ethers synthesis from methanol and formaldehyde solution over one-pot synthesized spherical mesoporous sulfated zirconia

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