Liquid-phase synthesis of isoprene from MTBE and formalin using cesium salts of silicotungstic acid

Songsiri, Nattaporn; Rempel, Garry L.; Prasassarakich, Pattarapan

doi:10.1016/j.mcat.2017.06.002

Cited by 18 publications

(12 citation statements)

References 33 publications

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“…20,21 To avoid the disadvantages, loading HPAs onto a certain support has been proved to be an effective strategy for high catalytic activity and excellent stability. [22][23][24] Among all current supports, hexagonal boron nitride (h-BN) is one of the most favorable ones because of the high specic surface areas, layered structure, excellent thermal stability and so on. [25][26][27][28][29][30][31][32][33] However, all current reported h-BN supported catalysts were gained by impregnation process, leading to the poor dispersion and agglomeration during the catalytic performance, especially in liquid phase reactions such as oxidative desulfurization, leading to the poorer recycling performance.…”

Section: Introductionmentioning

confidence: 99%

Phosphomolybdic acid immobilized on ionic liquid-modified hexagonal boron nitride for oxidative desulfurization of fuel

Lan

et al. 2017

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Phosphomolybdic acid immobilized on ionic liquid-modified hexagonal boron nitride for oxidative desulfurization of fuel

Lan

et al. 2017

RSC Adv.

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“…4b). Pure STA [15,26,27]. These bands appear also in the FTIR spectra of the CS/STA complex structures, so that the Keggin structure of the heteropolyacid is preserved even after the ionotropic gelation fabrication process.…”

Section: X-ray Diffraction and Ftir Spectroscopymentioning

confidence: 99%

Performance of H2-fed fuel cell with chitosan/silicotungstic acid membrane as proton conductor

et al. 2020

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Composite organic-inorganic proton exchange membranes for H 2 -O 2 fuel cells were fabricated by ionotropic gelation process combining a biopolymer (chitosan) with a heteropolyacid (silicotungstic acid). According to scanning electron microscopy analysis, compact, homogeneous and free-standing thin layers were synthesized. X-ray diffraction proved the crystallinity of the fabricated membranes and showed the presence of Chitosan Form I polymorph soon after the reticulation step and of the Form II polymorph after the functionalization step. Fourier-transform infrared spectroscopy demonstrated that the Keggin structure of the heteropolyacid is maintained inside the membrane even after the fabrication process. These membranes worked properly as proton conductors in a low-temperature (25 °C) fuel cell apparatus using hydrogen as fuel recording a promising power density peak of 268 mW cm −2 with a Pt loading of 0.5 mg cm −2 .

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“…Moreover, additional studies on the synthesis of isoprene by alternative routes have been reported. Songsiri et al [72,73] synthesized isoprene using heteropolyacids as catalysts in a liquid-phase system under moderate conditions in which carbon deposits can be inhibited. Methyl tertiary-butyl ether (MTBE) was used as the source of isobutene.…”

Section: Synthesis Of Isoprenementioning

confidence: 99%

Synthesis of 1,3-Butadiene and Its 2-Substituted Monomers for Synthetic Rubbers

Liu

et al. 2019

Catalysts

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Synthetic rubbers fabricated from 1,3-butadiene (BD) and its substituted monomers have been extensively used in tires, toughened plastics, and many other products owing to the easy polymerization/copolymerization of these monomers and the high stability of the resulting material in manufacturing operations and large-scale productions. The need for synthetic rubbers with increased environmental friendliness or endurance in harsh environments has motivated remarkable progress in the synthesis of BD and its substituted monomers in recent years. We review these developments with an emphasis on the reactive routes, the products, and the synthetic strategies with a scaling potential. We present reagents that are primarily from bio-derivatives, including ethanol, C4 alcohols, unsaturated alcohols, and tetrahydrofuran; the major products of BD and isoprene; and the by-products, activities, and selectivity of the reaction. Different catalyst systems are also compared. Further, substituted monomers with rigid, polar, or sterically repulsive groups, the purpose of which is to enhance thermal, mechanical, and interface properties, are also exhaustively reviewed. The synthetic strategies using BD and its substituted monomers have great potential to satisfy the increasing demand for better-performing synthetic rubbers at the laboratory scale; the laboratory-scale results are promising, but a big gap still exists between current progress and large scalability.

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Liquid-phase synthesis of isoprene from MTBE and formalin using cesium salts of silicotungstic acid

Cited by 18 publications

References 33 publications

Phosphomolybdic acid immobilized on ionic liquid-modified hexagonal boron nitride for oxidative desulfurization of fuel

Phosphomolybdic acid immobilized on ionic liquid-modified hexagonal boron nitride for oxidative desulfurization of fuel

Performance of H2-fed fuel cell with chitosan/silicotungstic acid membrane as proton conductor

Synthesis of 1,3-Butadiene and Its 2-Substituted Monomers for Synthetic Rubbers

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