Topic
Phosphotungstic acid
About: Phosphotungstic acid is a research topic. Over the lifetime, 1925 publications have been published within this topic receiving 38059 citations. The topic is also known as: Phosphowolframic acid.
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TL;DR: In this article, the feasibility of total reducing sugar (TRS) yield through the composition analysis and catalytic biomass hydrolysis was examined for five different biomass feedstocks, namely, miscanthus, sugarcane leaves, switchgrass, sunflower seeds, and bamboo leaves.
18 citations
TL;DR: In this paper, a new magnetically separable CoFe 2 O 4 nanoparticles were prepared and used as a support for the immobilization of 12-tungstophosphoric acid.
18 citations
TL;DR: In this article, anion exchange membranes (AEMs) based on polybenzimidazole (PBI) and 1-butyl-3-methyl imidazolium phosphotungstate (PWA-IL) have been prepared.
18 citations
TL;DR: In this article, a structural analysis of Preyssler-type phosphotungstic acid, H14[P5W30O110Na], using 183W NMR, 31P NMR and IR spectroscopy, as well as complete elemental analysis revealed that H14·44H2O was obtained in pure form.
Abstract: Full structural analysis of Preyssler-type phosphotungstic acid, H14[P5W30O110Na], using 183W NMR, 31P NMR, and IR spectroscopy, as well as complete elemental analysis revealed that H14[P5W30O110Na]·44H2O was obtained in pure form. H14[P5W30O110Na] started to decompose by heating at 373 K and was less stable than Keggin-type phosphotungstic acid, H3PW12O40·6H2O, which was stable even after heating at 673 K. Acidic strength measurements using trimethyl phosphine oxide (Me3P=O) as a probe molecule indicated that the acidic strength of H14[P5W30O110Na] was greater than that of H3PW12O40 on the basis of the amount of acid in an aqueous solution. H14[P5W30O110Na] was less active than H3PW12O40 for hydrolysis of alkyl acetates on the basis of acid amount. However, H14[P5W30O110Na] was more active than H3PW12O40 for hydrolysis of alkyl acetates with small alkyl groups on the basis of catalyst weight because acid amount per weight of H14[P5W30O110Na] was about two times higher than that of H3PW12O40.
18 citations
TL;DR: A hybrid heterogeneous catalyst with both Bronsted and Lewis acidity can efficiently promote the conversion of dibenzyl ether, the self-condensation product of benzyl alcohol, to the benzylation products, as well restrain the polybenzylation of aromatics as discussed by the authors.
18 citations