Isomerization of styrene oxide to phenylacetaldehyde over supported phosphotungstic heteropoly acid.

• Autor(a) principal: Costa, Vinícius Vieira
• Data de Publicação: 2010
• Outros Autores: Rocha, Kelly Alessandra da Silva, Kozhevnikov, Ivan V., Gusevskaya, Elena Vitalievna
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFOP
• Texto Completo: http://www.repositorio.ufop.br/handle/123456789/5092; https://doi.org/10.1016/j.apcata.2010.06.005
• topic: Isomerization; Styrene oxide; Phenylacetaldehyde; Acid catalysis; Heteropoly acid

Silica-supported H3PW12O40 (PW), the strongest heteropoly acid in the Keggin series, is an efficient, environmentally friendly heterogeneous catalyst for the liquid-phase isomerization of styrene oxide into phenylacetaldehyde, an industrially important intermediate for fine chemical synthesis. The reaction occurs in cyclohexane as a solvent under mild conditions at 25–70 ◦C with low catalyst loadings and without PW leaching in solution. At 60 ◦C, the yield of phenylacetaldehyde reaches 92% at 97% styrene oxide conversion, with a catalyst turnover number of 19 600. The catalyst can be recovered and reused.