epoxidação do óleo de mamona e derivados empregando o sistema catalítico vo(acac)2/tbhp epoxidation of castor oil and its derivatives using vo(acac)2/tbhp as the catalytic system
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epoxidação do óleo de mamona e derivados empregando o sistema catalítico vo(acac)2/tbhp epoxidation of castor oil and its derivatives using vo(acac)2/tbhp as the catalytic system

;Marta Regina dos Santos Nunes;Marcia Martinelli;Marcelo Monteiro Pedroso
greece and rome 2008 Vol. 31 pp. 818-821
136
nunes2008qumicaepoxidao

Abstract

The alternative system VO(acac)2/TBHP was investigated for the epoxidation reaction of castor oil and its derivatives. Results of 88% of conversion, 73% of epoxidation and 82% of selectivity were obtained for the system containing 20% excess of TBHP and 1% of VO(acac)2 catalyst, during 3 h under toluene reflux. The product was characterized by GC/MS as methyl-cis-9, 10-epoxi, 12-hydroxystearate and quantitative ¹H NMR was used to calculate the data above. Preliminary results indicate that the heterogeneous system VO(acac)2 grafted on K10 clay can also promote epoxidation of castor oil.

Keywords

castor oil heterogeneous systemchemistry

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DOI:
10.1590/S0100-40422008000400021
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http://www.scielo.br/scielo.php?script=sci_arttext...

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