Development of fluidized bed catalyst for phthalic anhydride production

Hitoshi Saima, Toshinao Aono, Yukio Asami, Tatsuya Nobusawa, Toshihide Suzuki

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1 Citation (Scopus)


JFE Group has produced phthalic anhydride at its Chiba plant since 1979 by using a fluidized bed reactor. A ground silica-based catalyst was used at the beginning of fluidized bed operation. By changing to a spherical type catalyst, the duration of catalytic activity was increased and catalyst density in the bed was reduced by around 10%. Addition of Cs to the catalyst enhanced its activity. Non-active silica gel was used as diluent for matching catalyst activity with plant capacity. The active component of Cs added to the catalyst has a lower melting point, the catalyst particles bound with it. The fluidized bed was operated stably by controlling the Cs/K ratio.

Original languageEnglish
Pages (from-to)272-276
Number of pages5
Journalkagaku kogaku ronbunshu
Issue number3
Publication statusPublished - May 1 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)


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