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Keggin heteropolyacids Mo-based as catalysts in the green and selective oxidation of diphenyl sulfide
(Elsevier, 2013-03)
Heteropolyacids are used as redox catalysts due to their bifunctional properties. Some advantages over conventional catalysts, such as selectivity, easy isolation and reuse, are worth noting. In homogeneous conditions their ...
HYDRATION AND ACETYLATION OF LIMONENE: SUPPORTED HETEROPOLYACIDS
(Sociedad Chilena de Química, 2008)
Effect of the support on a new metanethole synthesis heterogeneously catalyzed by Keggin heteropolyacids
(Elsevier Science, 2006-02)
Keggin heteropolyacids, supported on solids of different nature and textural characteristics, were used in the reaction of anethole dimerization in order to obtain metanethole. The characterization by Fourier transform ...
Isomerization-cracking of N-octane on catalysts based on heteropolyacid H3PW12O40 and heteropolyacid supported on zirconia and promoted with Pt and Cs
(Sociedade Brasileira de Química, 2013-06)
Isomerization-cracking of n-octane was studied using H3PW12O40 (HPA) and HPA supported on zirconia and promoted with Pt and Cs. The addition of Pt and Cs to the supported HPA did not modify the Keggin structure. The Pt ...
Heteropolyacids with Keggin structure supported on silica-alumina
(Inderscience Enterprises, 2006-08-16)
The behaviour of molybdophosphoric acid, with Keggin structure, supported on different silica-alumina mixtures, obtained by sol-gel method, was studied. Different techniques were used to synthesise the supports. In one of ...
Etherification of Hydroxymethylfurfural with Preyssler Heteropolyacids Immobilized on Magnetic Composites
(Wiley Blackwell Publishing, Inc, 2018-05)
A thermodynamic study about the stability of intermediates in the reaction of 5-hydroxymethylfurfural (HMF) over Preyssler heteropolyacids (HPA-Preyssler) was performed to explain the self-etherification or oxidation of ...
Molecular Structure and Thermal Stability of Oxide-Supported Phosphotungstic Wells-Dawson Heteropolyacid
(Royal Society Of Chemistry, 2015-02-12)
We present, for the first time in literature, a systematic study of the molecular structure of the Wells-Dawson heteropolyacid H6P2W18O62.24H2O (HPA) dispersed on TiO2, SiO2, ZrO2 and Al2O3. The heteropolyacid-based ...
A suitable synthesis of azlactones (4-benzylidene-2-phenyloxazolin-5-ones and 4-alkylidene-2-phenyloxazolin-5-ones) catalyzed by silica-alumina supported heteropolyacids
(Elsevier Science, 2009-01)
Eleven examples of azlactones (4-benzylidene-2-phenyloxazolin-5-ones and 4-alkylidene-2-phenyloxazolin-5-ones) were prepared via an Erlenmeyer-type synthesis from aromatic aldehydes, hippuric acid and acetic anhydride was ...