Sulfonated Styrene–Dimethacrylate Resins with Improved Catalytic Activity

Silva, V. F. L.; Penariol, J. L.; Dias, J. R.; Theodoro, T. R.; Carpegiani, J. A.; Aguiar, Leandro G.

doi:10.1134/s0023158419050112

Cited by 8 publications

(7 citation statements)

References 24 publications

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“…Playing a catalytic role in many reactions, sulfonated styrene–DVB resins from commercial lines such as Amberlyst, Amberlite, Purolite, , Dowex, and Lewatit, among others, have been extensively studied. Recently, modified resins composed of styrene cross-linked with alternative divinyl monomers such as ethylene glycol dimethacrylate (EGDMA) and triethylene glycol dimethacrylate (TEGDMA) have been synthesized and tested in esterification reactions. − These resins presented promising catalytic activity, indicating that the properties of the polymer matrix and the consequent accessibility to catalytic sites should be better explored. The catalytic efficiency of sulfonated resins depends not only on their porosity, specific surface, and ion exchange capacity but also on their degree of cross-linking and consequent swelling indexes.…”

Section: Introductionmentioning

confidence: 99%

Modeling the Effect of Cross-Link Density on Resins Catalytic Activities

Aguiar

Godoy

Nápolis

et al. 2021

Ind. Eng. Chem. Res.

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Two mathematical models were coupled to quantitatively assess the effect of cross-link density on the catalytic activity of sulfonated styrene−divinylbenzene (DVB) resins: (I) a copolymerization model comprised of the mass balances of species and sequences, which is used to quantify inaccessible catalytic sites, and (II) a second-order pseudohomogeneous kinetic model to describe the catalyzed reactions. The fraction of inaccessible sites ranged from 10% to 72% of the total sites for resins with 4% and 20% DVB, respectively. It was found that chain segments with six or less monomer units between cross-links contain inaccessible sites for the catalyzed reactions studied herein. The mathematical approach was validated with 53 catalysis experiments from the literature and provided good agreements. A linear correlation for the fraction of inaccessible sites as a function of sequences distribution was proposed and validated, providing R 2 = 0.992. These results can represent a valuable tool to improve the performance of styrene−DVB-based catalysts.

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Section: Introductionmentioning

confidence: 99%

Modeling the Effect of Cross-Link Density on Resins Catalytic Activities

Aguiar

Godoy

Nápolis

et al. 2021

Ind. Eng. Chem. Res.

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“…Silva et al. [ 15 ] studied this reaction and found promising results for the PS‐EGDMA resin in comparison with Amberlyst 36. The same system was studied using 3 g L −1 of catalyst with an acetic acid/isoamyl alcohol molar ratio of 2:1 at 80°C, and an alcohol conversion of 87% was achieved in 2 h of reaction.…”

Section: Introductionmentioning

confidence: 99%

“…[ 16 ] Resins with ethylene glycol dimethacrylate have a relatively high swelling index, which can favor the accessibility of the catalytic sites. [ 15 ]…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Sulfonated Poly[Styrene‐co‐(Trimethylolpropane Triacrylate)] and Application in the Catalysis of Glycerol Acetylation

Godoy

Castro

Nápolis

et al. 2020

Macromolecular Symposia

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The purpose of this study is the synthesis of a sulfonated resin of styrene cross‐linked with trimethylolpropane triacrylate (PS‐TMPTA) and its application as a catalyst in glycerol acetylation. The process for obtaining the resins is an aqueous suspension copolymerization at 80°C followed by a sulfonation with sulfuric acid at 57.5°C. Resin characterizations are performed regarding characteristics such as ion exchange capacity and swelling index. The ion exchange capacity (IEC) found for PS‐TMPTA (4.4 mmol g−1) is lower compared to those of commercial resins, for example, Amberlyst 36 (5.4 mmol g−1). Despite the low IEC (lower number of catalytic sites), PS‐TMPTA presents a relatively high swelling index (2.4) and a higher turnover number (TON = 62.3 h−1) in comparison with the resin Amberlyst 36 (TON = 51.1 h−1) in glycerol acetylation at 80°C with excess of acetic acid.

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“…. Estudos recentes comumente mencionam o uso extensivo da resina Amberlyst em processos de acetilação, assim como o estudo das resinas de estireno sulfonado reticuladas com dimetacrilato de trietilenoglicol (TEGDMA), dimetacrilato de etileno glicol (EGDMA) e triacrilato de trimetilolproprano (TMPTA) (PENARIOL et al, 2019;SILVA et al, 2019;SILVA et al, 2019;CARPEGIANI et al, 2020;GODOY et al, 2020;GODOY et al, 2021;GODOY et al, 2022).…”

Section: Lista De Figurasunclassified

“…Esse processo possui como produtos principais: mono-acetil-glicerol (monoacetina), di-acetil-glicerol (diacetina) e tri-acetil-glicerol (triacetina), sendo que os dois primeiros possuem conjuntos de isômeros que dependem da posição em que o ácido esterificou o glicerol (MELERO et al, 2007). A quantidade desses isômeros pode variar de acordo com as condições experimentais, com a prevalência de 1-monoacetina e PENARIOL et al, 2019;SILVA et al, 2019CARPEGIANI et al, 2020GODOY et al, 2020;GODOY, 2021;GODOY et al, 2021;GODOY et al, 2022).…”

Section: Esterificação Do Glicerolunclassified

Estudo da modelagem matemática da acetilação do glicerol catalisada por diferentes resinas poliméricas

Carpegiani¹

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por prover tanto o código do programa quanto a solução para a comparação entre os modelos.Aos colegas de pós-graduação, em especial ao William M. Godoy pela parceria e prestatividade no projeto.A CAPES, pelo suporte financeiro através da concessão de bolsa de estudo.A todos meus amigos e família, pelo apoio durante a redação desse presente trabalho.À minha mãe, Marcia, e aos meus avós maternos, Vanda e David, sem limites de gratidão por tudo que fizeram e ainda fazem por mim.Aprender é a única coisa de que a mente nunca se cansa, nunca tem medo e nunca se arrepende. Leonardo da VinciRESUMO CARPEGIANI, J. A. Estudo da modelagem matemática da acetilação do glicerol por diferentes resinas poliméricas. 2022. 152 p. Dissertação (Mestrado em Ciências) -

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Sulfonated Styrene–Dimethacrylate Resins with Improved Catalytic Activity

Cited by 8 publications

References 24 publications

Modeling the Effect of Cross-Link Density on Resins Catalytic Activities

Modeling the Effect of Cross-Link Density on Resins Catalytic Activities

Synthesis of Sulfonated Poly[Styrene‐co‐(Trimethylolpropane Triacrylate)] and Application in the Catalysis of Glycerol Acetylation

Estudo da modelagem matemática da acetilação do glicerol catalisada por diferentes resinas poliméricas

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