heteropoly acid


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heteropoly acid

[‚hed·ə′räp·ə·lē ′as·əd]
(inorganic chemistry)
Complex acids of metals, whose specific gravity is greater than 4, with phosphoric acid; an example is phosphomolybdic acid.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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As an example, Showa Denko of Japan commercialized a process using palladium-based heteropoly acid catalysts for ethylene oxidation to acetic acid in 1997 [2].
Wang, "Hydrolysis of cellulose by the heteropoly acid [H.sub.3]P[W.sub.12][O.sub.40]," Cellulose, vol.
Dutta, "Activated clay supported heteropoly acid catalysts for esterification of acetic acid with butanol," Applied Clay Science, vol.
Gusevskaya, "Isomerization of styrene oxide to phenylacetaldehyde over supported phosphotungstic heteropoly acid," Applied Catalysis A, vol.
In this regard an inorganic heteropoly acid salt of zirconium based compound will be synthetized in nanoscale using the sol-gel preparation technique.
Summary: TEHRAN (FNA)- Iranian researchers waterproofed building materials with very high efficiency by using the green and noncorrosive heteropoly acid catalyst.
Heteropoly acid is the general term for oxygen acid composed of heteroatomic and multiatomic molecules through an oxygen atom bridging ligand [12-14].
Inorganic heteropoly acid reduces electroosmotic drag effectively and retains proton conductivity as much as possible by creating pathway for water molecules [15].
Heteropoly acid (HPA) has been extensively studied as acid or oxidation catalyst for a wide range of reactions [16,17].
Mixed matrix membranes of poly(vinyl alcohol) (PVA), loaded with phosphomolybdic heteropoly acid (HPA) and cross-linked with glutaraldehyde prepared by the solution casting technique.