NDLI: Catalytic liquid phase oxidation of p-xylene using transition metal substituted polyoxometalates

Content Provider	CSIR - National Institute of Science Communication and Policy Research (NISCPR)
Author	Gopinathan, Sarada Alekar, Nirupa A. Gopinathan, C.
Abstract	Liquid phase oxidation of p-xylene has been carried out in the presence of potassium salts of monosubstituted heteropoly compounds with tungsten as the addenda atom and having the general formulae [XW11MLO39]8-n.x H2O where X = P and Si , Mn+ = Co2+, Cu2+ and Mn2+ and L = H2O. The reactions are carried out in a halide free environment using air as the oxidant and water as the solvent at a temperature of 180°C. High values of p-xylene conversion to the order of 70% are obtained using K6[SiW11Co(H2O)O39].14 H2O as catalyst The silicotungstate derivatives have been found to be more efficient catalysts than the phosphotungstate analogues for the oxidation of p-xylene. The product obtained is mainly p-toluic and terephthalic acids with minor quantities of p-tolualdehyde and p-methyl benzylalcohol. Influence of reaction parameters such as temperature, solvents and catalyst concentration on the oxidation reaction and its effect on product distribution have been examined.
Ending Page	441
Starting Page	439
ISSN	03764710
e-ISSN	09750975
Journal	Indian Journal of Chemistry -Section A (IJC-A)
Issue Number	04
Volume Number	39A
Language	English
Publisher	CSIR-NISCAIR, India
Publisher Date	2000-04-01
Access Restriction	Open
Rights License	CC Attribution-Noncommercial-No Derivative Works 2.5 India
Subject Keyword	Research Journal Chemistry
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry Physical and Theoretical Chemistry

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