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Topics in Catalysis

, Volume 11, Issue 1–4, pp 195–204 | Cite as

Synthesis of 3-fluorobenzaldehyde by gas-phase selective oxidation on Fe–Mo oxide/boralite catalysts

  • G. Centi
  • S. Perathoner
  • S. Tonini
Article

Abstract

The gas-phase selective synthesis of 3-fluorobenzaldehyde from 3-fluorotoluene over bulk iron molybdate and Fe–Mo oxide in a host boralite sample is described. The latter samples, prepared by adding Fe and Mo by chemical vapor deposition to the boralite, show high selectivity in oxidation, making yields of 3-fluorobenzaldehyde of over 40% possible. The pretreatment of the zeolite to eliminate extra-framework boron improves behavior, and secondary post-addition of molybdenum by CVD to increase the Mo/Fe ratio in the catalyst has a similar enhancing effect. The behavior of Fe–Mo/boralite samples proves significantly better, in terms of both specific activity (per mass of active phase) and selectivity, than bulk Fe2(MoO4)3, but at high conversion lower selectivities are found probably due to the presence of limitations in the backdiffusion of 3-fluorobenzaldehyde.

3-fluorotoluene 3-fluorobenzaldehyde iron molybdate Fe–Mo/boralite oxidation 

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Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • G. Centi
    • 1
  • S. Perathoner
    • 1
  • S. Tonini
    • 1
  1. 1.Dipartimento di Chimica Industriale ed Ingegneria dei MaterialiUniversity of MesssinaMessinaItaly

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