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vol.49 número3INCLUSION COMPOUN DS OF α AND γ -CYCLODEXTRINS WITH n-ALKYL AMINE (n= 12, 18)EFFECT OF TREE AGE ON VARIATION OF PINUS RADIATA D. DON CHEMICAL COMPOSITION índice de autoresíndice de assuntospesquisa de artigos
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Journal of the Chilean Chemical Society

versão On-line ISSN 0717-9707

Resumo

COMELLI, Nora A et al. OBTENTION OF CAMPHENE WITH H3PW12O40 CATALYSTS SUPPORTED ON TiO2, SiO2 AND ZrO2nH2O. J. Chil. Chem. Soc. [online]. 2004, vol.49, n.3, pp.245-250. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072004000300011.

The -pinene isomerization reaction was studied on catalysts based on H3PW12O40 (HPW) supported on TiO2, SiO2 and ZrO2nH2O. Catalysts with a 40% nominal charge of phosphotungstic acid (HPW) were prepared by impregnation of supports with a HPW solution. The study of the isomerization reaction was carried out in liquid phase by using a discontinuous reactor, magnetically stirred and maintaining a constant temperature. The catalyst supported on SiO2 resulted to be the most active while the one supported on ZrO2nH2O was the less active. This behavior correlated with the number and strength of the acid sites. XRD studies revealed the formation of HPW crystals when it was supported on SiO2.

Palavras-chave : -pinene; camphene acid catalysts; phosphotungstic acid; isomerization.

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