Epoxidation of Butadiene with Hydrogen Peroxide Catalyzed by the Salts of Phosphotungstate Anions: Relation Between Catalytic Activity and Composition of Intermediate Peroxo Complexes

Kuznetsova LI; Kuznetsova NI; Maksimovskaya RI; Aleshina GI; Koscheeva OS; Utkin VA

Catalysis Letters, Vol.141, No.10, 1442-1450, 2011

DOI10.1007/s10562-011-0676-1 Export Citation

Epoxidation of Butadiene with Hydrogen Peroxide Catalyzed by the Salts of Phosphotungstate Anions: Relation Between Catalytic Activity and Composition of Intermediate Peroxo Complexes

Kuznetsova LI, Kuznetsova NI, Maksimovskaya RI, Aleshina GI, Koscheeva OS, Utkin VA

Epoxidation of 1,3-butadiene has been studied in acetonitrile solutions of aqueous H2O2 and tetrabutylammonium or 1-ethyl-3-methylimidazolium salts of phosphotungstate anions: [(n-C4H9)(4)N](3){PO4[WO(O-2)(2)](4)}, [(n-C4H9)(4)N](5)Na0.6H1.4[PW11O39] or [(C2H5)(CH3)C3H3N2](5)NaH[PW11O39]. The selectivity of the 1,3-butadiene to 3,4-epoxy-1-butene (EpB) conversion attains 97% at nearly 100% efficiency of the H2O2 consumption. The rate of the EpB formation has been correlated with the solution compositions as found by P-31 NMR under the reaction conditions.

Keywords:Epoxidation;1,3-Butadiene;Hydrogen peroxide;Phosphotungstates;Tetrabutylammonium;1-Ethyl-3-methylimidazolium;P-31 NMR