Advertisement

Korean Journal of Chemical Engineering

, Volume 14, Issue 6, pp 502–506 | Cite as

Catalytic fluorination of HCFC-133a (1,1,1-trifluoro-2-chloroethane)

  • Dong Hyun Cho
  • Young Gul Kim
  • Moon Jo Chung
  • Jong Shik Chung
Article

Abstract

Catalytic fluorination of HCFC-133a was performed over metal oxide catalysts. Chromium oxide showed the best catalytic activity among several metal oxides tested. An increase in the crystallinity with decreased surface area resulted in a decrease of catalytic activity for the fluorination reaction. Active phase of chromia is Cr-O-F-OH having a proper ratio of O/F and a high hydroxyl content. The hydroxyl content on the catalyst is strongly dependent on support material. The selectivity to HFC-134a is independent of the O/F ratio on the Cr surface.

Key words

Chromium Oxide Fluorination l,l,l-Trifluoro-2-Chloroethane 1,1,1,2-Tetrafluoroethane 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Bell, S. L., “Manufacture of Halogenated Compounds”, US patent.4, 129603, 1978.Google Scholar
  2. Brunet, S., Requieme, B., Colnay, E., Barrault, J. and Blanchard, M., “ Catalytic Gas-phase Fluorination of 1,1,1-Trifluoro-2-chloethane over Chromium (III) Oxide: Preparation of Hydrofluoroalkanes”,Appli. Catal, B,5, 305 (1995).CrossRefGoogle Scholar
  3. Burwell, R. L. jr., Haller, G. L., Taylor, K. C. and Read, J.F., “Chemisorptive and Catalytic Behavior of Chromia”,Adv. Catal,19, 62 (1969).Google Scholar
  4. Kim, H., Kim, H. S., Lee, B. G., Lee, H. and Kim, S., “Effect of Magnesium Fluoride in Chromium-Magnesium Catalysts on the Fluorination Reaction of l,l,-Trifluo-2-2chloroethane”,J. Chem. Soc, Chem. Comma., 374 (1993).Google Scholar
  5. Lee, H., Jeong, H. D, Chung, Y. S., Lee, H. K. and Chung, M. J., “Fluorination of CF3CH2]C1 over Cr-Mg Fluoride Catalyst: The Effect of Temperature on the Catalyst Deactivation”,J.Catal,169, 307 (1997).CrossRefGoogle Scholar
  6. Lu, J., Yang, H., Chen, S., Shi, L., Ren, J., Li, H. and Peng, S., “Synthesis of HFC-134a over CrF3/AlF3”,Chem. Lett.,41, 221 (1996).Google Scholar
  7. Manzer, L. E. and Rao, V. N. M., “Catalytic Synthesis of Chlorofluorocaibon Alternatives”,Adv. Catal,39, 329 (1993).CrossRefGoogle Scholar
  8. Mcdaniel, M. P. and Burwell, R. L. jr., “Excess Oxygen of Chromia”,J. Catal,36, 394 (1975).CrossRefGoogle Scholar
  9. Molina M. L. and Rowland F. S., “The Mechanism of Ozone Depletion”, Nature,249, 810 (1974).CrossRefGoogle Scholar
  10. Potter, S. E., “Manufacture of Halogenated Compounds”, US Patent,4, 153675, 1979.Google Scholar
  11. Ruh, R. P. and Davis, R. A., “Process for Fluorination of Haloalkanes using a Hydrogen Fluoride Activated Catalyst Containing Alumina, a Metal Fluoride and Basic Aluminum Fluoride”, US Patent,2, 744148, 1956.Google Scholar
  12. Scherer, O., Korinth, J. and Frisch, P., “Fluorination of Aliphatic Compounds”, US Patent,3, 752850, 1973.Google Scholar
  13. Scherer, O., Korinth, J. and Frisch, P., “Process and Catalyst for Fluorination Aliphatic Compounds”, US Patent,3, 859424, 1975.Google Scholar
  14. Schraml-Marth, M., Wokaun, A., Curry-Hyde, H.E. and Baiker, A., “Surface Structure of Crystalline and Amorphous Chromia Catalysts for the Selective Catalytic Reduction of Nitric Oxide”,J.Catal,133, 415 (1992).CrossRefGoogle Scholar
  15. Sobolev, I., “Catalyst and Process for 1,1,1,2-Tetrafluoroethane by Vapor Phase Reaction”, US Patent,4, 792643, 1988.Google Scholar

Copyright information

© Korean Institute of Chemical Engineering 1997

Authors and Affiliations

  • Dong Hyun Cho
    • 1
  • Young Gul Kim
    • 1
  • Moon Jo Chung
    • 1
    • 2
  • Jong Shik Chung
    • 1
  1. 1.Department of Chemical Engineering and School of Environmental EngineeringPohang University of Science and TechnologyPohangKorea
  2. 2.CFC Alternative Tech, CenterKISTSeoulKorea

Personalised recommendations