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.
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References in periodicals archive ?
Pimerzin, Investigation of Co-Effect of 12-Tungstophosphoric Heteropolyacid, Nickel Citrate and Carbon-Coated Alumina in Preparation of NiW Catalysts for HDS, HYD and HDN Reactions, Appl.
PCL that was obtained by the ring-opening polymerization of [epsilon]-caprolactone using enzymatic, organic, metal catalyst systems [19], clay [20], heteropolyacid [21], and hydrated lanthanide halides in the presence of a microwave condition [22].
According to GreenMantra's patent, "the catalyst is prepared by binding a ferrous-copper complex to an alumina support and reacting it with heteropolyacid to obtain the final catalyst.
SDK's production process technology, which uses a solid heteropolyacid catalyst developed by SDK, adds ethylene directly to acetic acid, enabling efficient production of high-quality ethyl acetate, the company explained.
The new process technology uses a solid heteropolyacid catalyst developed by SDK.
Recent progress in the practical applications of heteropolyacid and perovskite catalysts: Catalytic technology for the sustainable society, Catalysis Today: 144, 285-291 (2009).
04 mol/L solutions of the heteropolyacid in a methanol-chloroform mixture (1:1, by volume) were used for the investigation of the interaction between the polymer and the heteropolyacid.
Most methods of phosphorus determination are based on the reaction of P with an acidified molybdate reagent to yield a phosphomolybdate heteropolyacid, which is then reduced to an intensely-coloured blue compound and determined spectrophotometrically (Murphy & Riley, 1962; McKelvie et al.
Yadav and Mehta (1994) also proved that Amberlyst 15 was more active than sulphated zirconia, heteropolyacid and concentrated sulphuric acid.
SDK) has received the Chemical Society of Japan (CSJ) Award for Technical Development for 2007 for the company's development of ethyl acetate/acetic acid manufacturing processes using solid heteropolyacid catalysts.
Wang, One-pot hydrothermal preparation of SBA-15 supported Keggin-type 12-tungstophosphoric heteropolyacid mesoporous material and its bifunctional catalytic performance.
Alternatives such as cationic exchangers like heteropolyacids supported on carbon [3], Si[O.