Superbasic sodium stannate as catalyst for dehydrogenation, Michael addition and transesterification reactions

Zhang, Shu Guo; Wei, Yu Dan; Yin, Shuang; Luo, Sheng; Au, Chak Tong

doi:10.1016/j.apcata.2011.08.015

Cited by 21 publications

(7 citation statements)

References 42 publications

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“…In the past two decades, there were many reports on solid superbases such as NaN 3 /c-Al 2 O 3 [4], Na/NaOH/c-Al 2 O 3 [5], K/MgO [6], Eu 2 O 3 /c-Al 2 O 3 [7], KNO 3 /c-Al 2 O 3 [8], KNO 3 /ZrO 2 [9], KOH/ZrO 2 [10], KF/c-Al 2 O 3 [11], and Ca(NO 3 ) 2 /SBA-15 [12]. Recently, we found that the solid superbases Na 2 SnO 3 [13,14] and KOH/La 2 O 3 -MgO [15] showed excellent catalytic efficiency towards some organic reactions at room temperature (RT). However, industrial application of solid superbases is limited because most of them are sensitive to O 2 and/or CO 2 , hence are difficult to prepare [1,2].…”

Section: Introductionmentioning

confidence: 94%

Novel MgO–SnO2 Solid Superbase as a High-Efficiency Catalyst for One-Pot Solvent-Free Synthesis of Polyfunctionalized 4H-pyran Derivatives

et al. 2012

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We report for the first time the hydrothermal synthesis of MgO-SnO 2 solid superbase using P123 as template. The basicity of the materials was determined by two approaches of Hammett indicators method and temperature-programmed desorption using CO 2 as adsorbate (CO 2 -TPD). It was found that Mg/Sn molar ratio has an effect on MgO-SnO 2 basicity, and superbasicity was observed only at Mg/Sn molar ratio of 1. With variation of Mg/Sn molar ratio, superbase strength (H -) was in the 26.5-33.0 range, showing superbasic value up to 0.939 mmol/g. The structure and texture of the as-prepared materials were studied by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and N 2 physioadsorption methods. We detected particles of spherical morphology having diameter of ca. 150 nm. N 2 adsorption-desorption results suggested that the materials are of mesoporous structure, having specific surface area of 115.2 m 2 /g and average pore diameter of 6 nm. The superbase was found to exhibit excellent catalytic activity towards the one-pot synthesis of polyfunctionalized 4H-pyrans through the condensation of aldehydes, malononitrile, and an active methylene compound. Its excellent catalytic efficiency is related to its superbasicity of the MgO-SnO 2 . The results provide a new route for the design and preparation of composite oxide superbases. Furthermore, the solid superbases will facilitate a strategy for high-efficiency synthesis of polyfunctionalized 4H-pyrans.

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Section: Introductionmentioning

confidence: 94%

Novel MgO–SnO2 Solid Superbase as a High-Efficiency Catalyst for One-Pot Solvent-Free Synthesis of Polyfunctionalized 4H-pyran Derivatives

et al. 2012

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“…Several studies have also reported the effect of the basicity of sodium-based catalysts [66][67][68][69][70]. Zhang et al [67] described the synthesis of a sodium stannate with a high concentration of basic sites and high catalytic activity in transesterification reactions of a cyclic carbonate with methanol. Marciniuk et al [68] reported the application of sodium titanate as a basic catalyst in the transesterification of ethyl acetate with ethanol.…”

Section: Transesterification Reactions Of Edible Non-edible and Wastmentioning

confidence: 99%

Metallo-stannosilicate heterogeneous catalyst for biodiesel production using edible, non-edible and waste oils as feedstock

Silva

Santisteban

Vasconcellos

et al. 2018

Journal of Environmental Chemical Engineering

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Edible and non-edible lipid feedstocks A B S T R A C TThis study reports the synthesis, physicochemical characterization by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and solid-state MAS NMR ( 1 H, 23 Na, 29 Si and 119 Sn MAS NMR) of a metallo-stannosilicate and its application as a heterogeneous catalyst for biodiesel production via ethanolysis and methanolysis routes using edible, non-edible an waste oils as feedstocks. XRD characterization of the metallo-stannosilicate has revealed a typical structure of mixed octahedral-pentahedral-tetrahedral material with an orthorhombic unit cell (a = 14.522 Ǻ, b = 12.469 Ǻ, and c = 10.654 Ǻ). 119 Sn single-pulse MAS NMR results presented two resonance lines, at δ 1 = -683.8 ppm and δ 2 = -690.9 ppm, which were assigned to the tin octahedrally coordinated in the metallo-stannosilicate structure. Heterogenous catalytic studies in the transesterification of refined edible, non-edible, and waste oils have resulted in high yields of FAMEs and FAEEs (fatty acid methyl and ethyl esters), nevertheless the highest FAMES (98.2%) and FAEEs (96.6%) yields were obtained for non-edible microalgae oil extracted from the genetically modified heterotrophic algal strain Prototheca moriformis. Catalytic studies also using non-edible macaw palm oil (Acrocomia aculeata) with a high content of free fatty acids (FFAs) demonstrated that the catalyst could simultaneously perform esterification and transesterification reactions. These findings indicate the potential application of this novel metallo-stannosilicate in the production of renewable and environmentally clean biofuels, like biodiesel, using different sources of lipids feedstocks, notably those that do not compete with food production.⁎ Corresponding author at: Rua Cristóvão Colombo 2265, São José do Rio Preto, SP,

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“…In Table 1, we have listed some recently investigated catalysts of particular industrial interest showing conversion values and CO 2 content percentages that were experimentally obtained by Covestro in the ROP of cEC. 19–22 These transition metal (vanadium) and main group element (phosphorous and tin) oxides are structurally simple, commercially available and efficient catalysts for the ROP of cEC. These properties make them highly interesting candidates for potential industrial implementation and trigger the need for a more fundamental understanding using computational methods.…”

Section: Introductionmentioning

confidence: 99%

A DFT-metadynamics study disclosing key properties of ring-opening polymerization catalysts to produce polyethercarbonate polyols from cyclic ethylene carbonate as part of an emerging CCU technology

Heshmat

Leven

Linker

et al. 2023

Phys. Chem. Chem. Phys.

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Superbasic sodium stannate as catalyst for dehydrogenation, Michael addition and transesterification reactions

Cited by 21 publications

References 42 publications

Novel MgO–SnO2 Solid Superbase as a High-Efficiency Catalyst for One-Pot Solvent-Free Synthesis of Polyfunctionalized 4H-pyran Derivatives

Novel MgO–SnO2 Solid Superbase as a High-Efficiency Catalyst for One-Pot Solvent-Free Synthesis of Polyfunctionalized 4H-pyran Derivatives

Metallo-stannosilicate heterogeneous catalyst for biodiesel production using edible, non-edible and waste oils as feedstock

A DFT-metadynamics study disclosing key properties of ring-opening polymerization catalysts to produce polyethercarbonate polyols from cyclic ethylene carbonate as part of an emerging CCU technology

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