Synthesis of lacunary polyoxometalate encapsulated into hexagonal mesoporous silica and their catalytic performance in esterification

Wu, Naijin; Li, Baoshan; Ma, Wei; Han, Chunying

doi:10.1016/j.micromeso.2013.12.006

Cited by 30 publications

(11 citation statements)

References 52 publications

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“…Thus, exploration of novel superacidic catalysts with high activity is highly conceived and desired for the indirection hydration process. Recently, polyoxometalate-based ionic liquids (ILs) serving as solid acid materials have received considerable attention owing to their unique properties of combining ILs and heteropolyacids, including strong acidity, high thermal stability, negligible volatility, and virtually unlimited tunability. − Several acidic polyoxometalate-based ionic hybrids exhibited superior catalytic performance in many acid-catalyzed reactions such as esterification, , transesterification, and alkylation, demonstrating that they would show great potential application in indirect hydration of olefin to alcohol.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, polyoxometalatebased ionic liquids (ILs) serving as solid acid materials have received considerable attention owing to their unique properties of combining ILs and heteropolyacids, including strong acidity, high thermal stability, negligible volatility, and virtually unlimited tunability. 14−24 Several acidic polyoxometalate-based ionic hybrids exhibited superior catalytic performance in many acid-catalyzed reactions such as esterification, 15,17 transesterification, 21 and alkylation, 22 demonstrating that they would show great potential application in indirect hydration of olefin to alcohol. Herein, we prepared a series of novel superacidic polyoxometalate-based ionic hybrids by grafting polyoxometalate and sulfonic acid group on 4,4′-bipyridine and 1,10phenanthroline as highly efficient catalysts for indirect hydration of olefin to alcohol.…”

Section: ■ Introductionmentioning

confidence: 99%

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Highly Efficient Indirect Hydration of Olefins to Alcohols Using Superacidic Polyoxometalate-Based Ionic Hybrids Catalysts

Cao

Zhao

et al. 2018

Ind. Eng. Chem. Res.

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Improving the catalytic efficiency in the hydration of olefins to alcohols is an important yet challenging issue in acid catalysis. Herein, a series of novel superacidic polyoxometalate-based ionic hybrids were prepared and employed as catalysts for highly efficient indirect hydration of olefins to corresponding alcohols. Several characterization techniques such as FT-IR spectra, XRD, SEM, and 31 P MAS NMR spectroscopy were performed to characterize the structures of these superacid hybrids and their acid properties. The results show that the catalytic performances of ionic hybrids were closely related to their acidic strength. The superacidic ionic hybrid [BPy-SO 3 H-OTf]PW was found to be the best active catalyst to obtain the corresponding alcohols with good yields. The catalytic efficiency in indirect hydration process using superacidic ionic hybrid catalysts is obviously superior to that of direct hydration, which thus opens up a new way to improve the efficiency of the current hydration process.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Highly Efficient Indirect Hydration of Olefins to Alcohols Using Superacidic Polyoxometalate-Based Ionic Hybrids Catalysts

Cao

Zhao

et al. 2018

Ind. Eng. Chem. Res.

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“…[115] Among all mentioned catalysts, phosphotungstic acid (PTA) shows the highest activity, but its poor stability and high solubility in the reaction solution hinder its large‐scale application [116] . A viable strategy for improving the performance of PTA is to incorporate them into solid carriers, such as silica, [117] molecular sieves, [118] and metal oxides [119] . Metal‐organic frameworks (MOFs), a kind of novel crystalline porous material, has been considered as a candidate for the catalyst carriers owing to its high surface areas, modifiable compositions and easy functionalization [120] .…”

Section: Preparation Of Adipic Acid From Phenolic Compoundsmentioning

confidence: 99%

Sustainable Routes for the Synthesis of Renewable Adipic Acid from Biomass Derivatives

Lang

2021

ChemSusChem

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Adipic acid (AA) is a key industrial dicarboxylic acid intermediate used in nylon manufacturing. Unfortunately, the traditional process technology is accompanied by serious environmental pollution. Given the growing demand for adipic acid and the desire to reduce its negative impact on the environment, considerable efforts have been devoted to developing more green and friendly routes. This Review is focused on the latest advances in the sustainable preparation of AA from biomassbased platform molecules, including 5-hydroxymethylfufural, glucose, γ-valerolactone, and phenolic compounds, through biocatalysis, chemocatalysis, and the combination of both.Additionally, the development of state-of-the-art catalysts for different catalytic systems systematically is discussed and summarized, as well as their reaction mechanisms. Finally, the prospects for all preparation routes are critically evaluated and key technical challenges in the development of green and sustainable processes for the manufacture of AA are highlighted. It is hoped that the green adipic acid synthesis pathways presented can provide insights and guidance for further research into other industrial processes for the production of nylon precursors in the future.

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“…In this approach, heteropoly acids such as phosphotungstate decompose in the presence of excessive hydrogen peroxide into a peroxide metal complex W(O 2 ) n , providing an active site for oxidative desulfurization [ 3 , 4 ]. For catalyst separation and recycling, it is desirable to load the heteropoly acids onto support materials [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Oxidative Desulfurization Catalyzed by Phosphotungstic Acid Supported on Hierarchical Porous Carbons

Wang

Kang

2021

Nanomaterials

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A hierarchical porous carbon material (HPC) with an ultra-high specific surface area was synthesized with sisal fiber (SF) as a precursor, and then H3PW12O40•24H2O (HPW) was immobilized on the support of SF−HPC by a simple impregnation method. A series characterization technology approved that the obtained SF−HPC had a high surface area of 3152.46 m2g−1 with micropores and macropores. HPW was well-dispersed on the surface of the SF−HPC support, which reduced the loading of HPW to as low as 5%. HPW/SF-HPW showed excellent catalytic performance for oxidative desulfurization, and the desulfurization rate reached almost 100% under the optimal reaction conditions. The desulfurization rate of HPW/SF-HPW could be maintained at above 94% after four recycles.

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Synthesis of lacunary polyoxometalate encapsulated into hexagonal mesoporous silica and their catalytic performance in esterification

Cited by 30 publications

References 52 publications

Highly Efficient Indirect Hydration of Olefins to Alcohols Using Superacidic Polyoxometalate-Based Ionic Hybrids Catalysts

Highly Efficient Indirect Hydration of Olefins to Alcohols Using Superacidic Polyoxometalate-Based Ionic Hybrids Catalysts

Sustainable Routes for the Synthesis of Renewable Adipic Acid from Biomass Derivatives

Oxidative Desulfurization Catalyzed by Phosphotungstic Acid Supported on Hierarchical Porous Carbons

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