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Acetone transformation into methyl isobutyl ketone over Pt/HMFI catalysts. IV. Effect of density and strength of the acidic sites

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Abstract

Acetone transformation into methyl isobutyl ketone (MIBK) was studied using a fixed-bed dynamic reactor at 160°C, 1 atm pressure and acetone/H2 molar ratio=3. The reaction was carried out over Pt/HMFI bifunctional catalysts, with 0.30 wt% of platinum which was supported over three aluminosilicates (Si/Al ratio=40, 95 and 160) and a borosilicate (Si/B ratio=44) with similar dispersion. The results show that catalytic properties depend greatly on density and strength of the acidic sites of the catalysts. Moreover, the limiting step of the MIBK synthesis reaction (aldolization of two acetone molecules) is carried out over the acidic sites of the aluminosilicates, but not over those of the borosilicate, which considerably affects reaction selectivity.

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Authors and Affiliations

  1. Facultad de Ingeniería, Universidad Central de Venezuela, PO Box 48.057, Caracas, 1041-A, Venezuela

    L. Melo, G. Giannetto, L. Cardozo & L. García

  2. Departamento de Química, IUT Región Capital, Caracas, Venezuela

    A. Llanos

  3. Faculté de Science, Université de Poitiers, Poitiers, France

    P. Magnoux & M. Guisnet

  4. Instituto de Superior Técnico, Lisbon, Portugal

    F. Alvarez

Authors
  1. L. Melo
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  2. G. Giannetto
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  3. L. Cardozo
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  4. A. Llanos
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  5. L. García
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  6. P. Magnoux
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  7. M. Guisnet
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  8. F. Alvarez
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Melo, L., Giannetto, G., Cardozo, L. et al. Acetone transformation into methyl isobutyl ketone over Pt/HMFI catalysts. IV. Effect of density and strength of the acidic sites. Catalysis Letters 60, 217–222 (1999). https://doi.org/10.1023/A:1019015325859

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