Sulfur trioxide containing caprolactamium hydrogen sulfate: An expanded ionic liquid for large-scale production of ε- Caprolactam

I. T. Horváth, V. Fábos, D. Lantos, A. Bodor, A. M. Bálint, L. T. Mika, O. E. Sielcken, A. D. Cuiper

Research output: Conference contribution

Abstract

The Beckmann rearrangement of cyclohexanone oxime to ε- caprolactam in the presence of oleum proceeds in an ionic liquid, the caprolactamium hydrogen sulfate. We report its remarkable capability to keep the vapor pressure of dissolved sulfur trioxide below 10 kPa even at 140°C, allowing its safe use in large scale processes for a long-time.

Original languageEnglish
Title of host publicationGas-Expanded Liquids and Near-Critical Media
Subtitle of host publicationGreen Chemistry and Engineering
PublisherAmerican Chemical Society
Pages235-239
Number of pages5
ISBN (Print)9780841269712
DOIs
Publication statusPublished - jan. 6 2009

Publication series

NameACS Symposium Series
Volume1006
ISSN (Print)0097-6156
ISSN (Electronic)1947-5918

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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    Horváth, I. T., Fábos, V., Lantos, D., Bodor, A., Bálint, A. M., Mika, L. T., Sielcken, O. E., & Cuiper, A. D. (2009). Sulfur trioxide containing caprolactamium hydrogen sulfate: An expanded ionic liquid for large-scale production of ε- Caprolactam. In Gas-Expanded Liquids and Near-Critical Media: Green Chemistry and Engineering (pp. 235-239). (ACS Symposium Series; Vol. 1006). American Chemical Society. https://doi.org/10.1021/bk-2009-1006.ch012