Polymer anchored catalysts for oxidation of styrene using TBHP and molecular oxygen / Sweta Sharma in Industrial & engineering chemistry research, Vol. 51 N° 26 (Juillet 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 26 (Juillet 2012) . - pp. 8806-8814 Titre : Polymer anchored catalysts for oxidation of styrene using TBHP and molecular oxygen Type de document : texte imprimé Auteurs : Sweta Sharma, Auteur ; Shishir Sinha, Auteur ; Shri Chand, Auteur Année de publication : 2012 Article en page(s) : pp. 8806-8814 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Oxidation Catalyst Résumé : Catalytic oxidation of styrene was investigated for polymer anchored Cu(II) and Mn(II) complexes prepared by Schiff base tridentate ligand. The effect of different oxidants, tert-butyl hydroperoxide (TBHP) under atmospheric pressure and molecular oxygen (O2) at high pressure in a batch reactor, were studied for maximum conversion of styrene and selectivity of styrene oxide product. The effect of various reaction parameters such as temperature, styrene to TBHP mole ratio, and catalyst amount were studied using TBHP as oxidant. The maximum conversion of styrene (87.3%) was obtained using Cu(II) complex, with maximum selectivity to styrene oxide (76.2%) at styrene to TBHP mole ratio of 1:3, 70 °C, and 25 mg catalyst The O2 oxidant showed maximum conversion of 45.5% at 80 °C and 0.5 MPa pressure, with a styrene oxide selectivity of 22.4%. The catalytic activity was improved to 70.0% by addition of TBHP as initiator during the use of O2 oxidant. The Cu(II) catalyst showed better catalytic activity in comparison to Mn(II) catalyst using both TBHP and O2 oxidant. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26107434 [article] Polymer anchored catalysts for oxidation of styrene using TBHP and molecular oxygen [texte imprimé] / Sweta Sharma, Auteur ; Shishir Sinha, Auteur ; Shri Chand, Auteur . - 2012 . - pp. 8806-8814. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 26 (Juillet 2012) . - pp. 8806-8814 Mots-clés : Oxidation Catalyst Résumé : Catalytic oxidation of styrene was investigated for polymer anchored Cu(II) and Mn(II) complexes prepared by Schiff base tridentate ligand. The effect of different oxidants, tert-butyl hydroperoxide (TBHP) under atmospheric pressure and molecular oxygen (O2) at high pressure in a batch reactor, were studied for maximum conversion of styrene and selectivity of styrene oxide product. The effect of various reaction parameters such as temperature, styrene to TBHP mole ratio, and catalyst amount were studied using TBHP as oxidant. The maximum conversion of styrene (87.3%) was obtained using Cu(II) complex, with maximum selectivity to styrene oxide (76.2%) at styrene to TBHP mole ratio of 1:3, 70 °C, and 25 mg catalyst The O2 oxidant showed maximum conversion of 45.5% at 80 °C and 0.5 MPa pressure, with a styrene oxide selectivity of 22.4%. The catalytic activity was improved to 70.0% by addition of TBHP as initiator during the use of O2 oxidant. The Cu(II) catalyst showed better catalytic activity in comparison to Mn(II) catalyst using both TBHP and O2 oxidant. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26107434

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