Epoxidação do óleo de mamona e derivados empregando o sistema catalítico VO(acac)2/TBHP

Autor:	Marcelo Monteiro Pedroso, Marta Regina dos Santos Nunes, Marcia Martinelli
Jazyk:	portugalština
Rok vydání:	2008
Předmět:	Óleo de mamona Chemistry Epoxidação General Chemistry Toluene Catalysis chemistry.chemical_compound Catálise homogênea Castor oil epoxidation medicine Proton NMR castor oil Organic chemistry heterogeneous system Selectivity medicine.drug
Zdroj:	Química Nova v.31 n.4 2008 Química Nova Sociedade Brasileira de Química (SBQ) instacron:SBQ Química Nova, Volume: 31, Issue: 4, Pages: 818-821, Published: 2008 Repositório Institucional da UFRGS Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS
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:	OpenAIRE
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