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
| Autor: | Marta Regina dos Santos Nunes, Marcia Martinelli, Marcelo Monteiro Pedroso |
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| Jazyk: | English<br />Spanish; Castilian<br />Portuguese |
| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Química Nova, Vol 31, Iss 4, Pp 818-821 (2008) |
| Druh dokumentu: | article |
| ISSN: | 0100-4042 1678-7064 |
| DOI: | 10.1590/S0100-40422008000400021 |
| Popis: | 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. |
| Databáze: | Directory of Open Access Journals |
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