Acid catalysis by heteropoly acids

MN Timofeeva - Applied Catalysis A: General, 2003 - Elsevier
The achievements in the field of acid catalysis by heteropoly acids having different structures
HxPW11LO40 (L= ZrIV, TiIV, ThIV), HxZW12O40 (Z= SiIV, PV, BIII, CoIII, GeIV) …

The state of the art on Wells–Dawson heteropoly-compounds: A review of their properties and applications

LE Briand, GT Baronetti, HJ Thomas - Applied Catalysis A: General, 2003 - Elsevier
The scientific literature concerning the structure, hydrolytic stability in solution, thermal
stability in the solid state, redox-acid properties and applications of heteropoly-compounds …

Catalytic upgrading of levulinic acid to ethyl levulinate using reusable silica-included Wells-Dawson heteropolyacid as catalyst

G Pasquale, P Vázquez, G Romanelli… - Catalysis …, 2012 - Elsevier
In this paper we report, for the first time, the direct incorporation of a heteropolyacid (HPA)
with Wells-Dawson structure during the synthesis of silica by the sol–gel technique, in acidic …

Ionic liquids: Green catalysts for alkene-isoalkane alkylation

S Singhal, S Agarwal, M Singh, S Rana, S Arora… - Journal of Molecular …, 2019 - Elsevier
Alkylation of isoalkane and alkene owns a note-worthy position among octane improving
chemical conversions. Widely adopted catalysts (H 2 SO 4 and HF) for alkylation at industrial …

Recent progress on catalyst technologies for high quality gasoline production

HD Velázquez, R Cerón-Camacho… - Catalysis …, 2023 - Taylor & Francis
The growing demand for clean and efficient fuels in the world reflects the rapid growth in
automotive vehicles and more stringent environmental regulations. Hence, the refining …

Theoretical Predictions of 31P NMR Chemical Shift Threshold of Trimethylphosphine Oxide Absorbed on Solid Acid Catalysts

A Zheng, H Zhang, X Lu, SB Liu… - The Journal of Physical …, 2008 - ACS Publications
The 31P NMR chemical shifts of adsorbed trimethylphosphine oxide (TMPO) and the
configurations of the corresponding TMPOH+ complexes on Brønsted acid sites with varying …

The role of water in the catalysis on solid heteropolyacids

A Micek-Ilnicka - Journal of Molecular Catalysis A: Chemical, 2009 - Elsevier
Heteropolyacids (HPAs) are used as catalysts for many acid reactions in both homogeneous
and heterogeneous systems. For such systems water, as a vapour and/or the crystallization …

Wells–Dawson heteropolyacid supported on silica: a highly efficient catalyst for synthesis of 2, 4, 5-trisubstituted and 1, 2, 4, 5-tetrasubstituted imidazoles

AR Karimi, Z Alimohammadi, MM Amini - Molecular diversity, 2010 - Springer
Abstract Heteropolyacid H 6 P 2 W 18 O 62· 24H 2 O (WD) supported on silica (WD/SiO 2)
has been used as an effective catalytic system for the synthesis of various 1, 2, 4, 5 …

Graphite-like polyoxometalate-based metal–organic framework as an efficient anode for lithium ion batteries

X Yang, P Zhu, X Ma, W Li, Z Tan, J Sha - CrystEngComm, 2020 - pubs.rsc.org
A new polyoxometalate (POM) pillared metal–organic framework (POMOF),[Cu24 (Trz) 16
(H2O) Cl4 (HPMo12O40)](Cu-POM, Trz= 1, 2, 3-triazole), was synthesized and …

Ionic liquid enhanced alkylation of iso-butane and 1-butene

P Cui, G Zhao, H Ren, J Huang, S Zhang - Catalysis Today, 2013 - Elsevier
The alkylation of iso-butane with 1-butene was catalyzed by triflic acid (TFOH) coupled with
a series of protic ammonium-based ionic liquids (AMILs), and the addition of the AMILs …