Rocha, Kelly Alessandra da SilvaRobles Azocar, Patrícia AlejandraKozhevnikov, Ivan V.Gusevskaya, Elena Vitalievna2015-04-172015-04-172009ROCHA, K. A. da S. et al. Phosphotungstic heteropoly acid as efficient heterogeneous catalyst for solvent-free isomerization of a-pinene and longifolene. Applied Catalysis. A, General, v. 352, p. 188-192, 2009. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0926860X08006303>. Acesso em: 02 fev. 2015.0926-860Xhttp://www.repositorio.ufop.br/handle/123456789/5126Silica-supported H3PW12O40 (PW), the strongest heteropoly acid in the Keggin series, is an efficient, environmentally friendly heterogeneous catalyst for the liquid-phase isomerization of a-pinene and longifolene into their more valuable isomers – camphene and isolongifolene, respectively, which are intermediates in the synthesis of expensive fragrances. The reactions occur under solvent-free conditions in the temperature range of 80–100 8C, with low catalyst loadings (0.15–5 wt%) and high turnover numbers (up to 6000 per proton). The catalyst can be easily recovered and reused. No PW leaching is observed in the reaction system.en-USIsomerizationTerpenesAcid catalysisHeteropoly acidArtigo publicado em periodicoO periódico Applied Catalysis A: General concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3581990121031.https://doi.org/10.1016/j.apcata.2008.10.005