Oxidation and ammoxidation of toluene and benzyl alcohol over silico-aluminophosphate and metal-silico-aluminophosphate catalysts

S. J. Kulkarni, R. Ramachandra Rao, M. Subrahmanyam, A. V. Rama Rao, A. Sárkány, L. Guczi

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The silico-aluminophosphate (SAPO), vanadium-aluminophosphate (VAPO) and vanadium-silico-aluminophosphate (VSAPO) catalysts were synthesized by hydrothermal method. Depending on silicon and vanadium content, the as-synthesized molecular sieves were thermally stable or unstable up to 400-450°C. The catalysts were characterized by XRD, IR, TG and sorption methods. The oxidation and ammoxidation reactions of toluene and benzylalcohol were carried out over SAPO, VAPO and VSAPO catalysts. The catalysts were selective in the oxidation and ammoxidation of toluene. The yield of benzonitrile was 20-92 wt.-%. The vanadium and Sb2O3 modification enhances the yield of benzonitrile substantially. The benzoic acid was not observed in the products. In the ammoxidation of benzylalcohol, the yield of benzonitrile was 18%-74%. The selectivity of benzonitrile was comparatively lower. The reaction scheme is discussed. We report silico-aluminophosphate, VSAPO and TiSAPO, as-synthesized molecular sieves, as a new and novel class of oxidation and ammoxidation catalysts.

Original languageEnglish
Pages (from-to)59-74
Number of pages16
JournalApplied Catalysis A: General
Volume139
Issue number1-2
Publication statusPublished - Jun 6 1996

Fingerprint

Benzyl Alcohol
Vanadium
Toluene
Alcohols
Metals
Oxidation
Catalysts
Molecular sieves
Benzoic Acid
Benzoic acid
Silicon
Sorption
benzonitrile

Keywords

  • Ammoxidation
  • Benzonitrile
  • Benzyl alcohol
  • SAPO
  • Toluene ammoxidation
  • Vanadium

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Oxidation and ammoxidation of toluene and benzyl alcohol over silico-aluminophosphate and metal-silico-aluminophosphate catalysts. / Kulkarni, S. J.; Ramachandra Rao, R.; Subrahmanyam, M.; Rama Rao, A. V.; Sárkány, A.; Guczi, L.

In: Applied Catalysis A: General, Vol. 139, No. 1-2, 06.06.1996, p. 59-74.

Research output: Contribution to journalArticle

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AU - Subrahmanyam, M.

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