Letter | Published:

Activity of the Chromium-Aluminium Oxide Catalyst System in the Nitrile-Diene and n-Heptane Cyclizations

Naturevolume 168pages387388 (1951) | Download Citation

Subjects

Abstract

THE chromium–aluminium oxide catalyst system is one most commonly used in the aromatization of paraffinic hydrocarbons. In practice, mixtures containing up to 20 per cent chromium oxide are used, this being regarded as the region of greatest catalytic activity. The work of Eischens and Selwood1 on this catalyst system established the close relation between the activity, magnetic susceptibility, and state of dispersion of the chromium oxide on the alumina. It was shown that at low chromium oxide content, the chromium oxide aggregates into clusters or islands which build up into two and even three layers in thickness, and which have high magnetic susceptibility and high catalytic activity.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1

    Eischens, R. P., and Selwood, P. W., J. Amer. Chem. Soc., 70, 2271 (1948).

  2. 2

    Hawkins, P. J., and Janz, G. J., J. Chem. Soc., 1485 (1949).

Download references

Author information

Affiliations

  1. Walker Laboratory, Department of Chemistry, Rensselaer Polytechnic Institute, Troy, N.Y.

    • G. J. JANZ
    •  & P. J. HAWKINS

Authors

  1. Search for G. J. JANZ in:

  2. Search for P. J. HAWKINS in:

About this article

Publication history

Issue Date

DOI

https://doi.org/10.1038/168387a0

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.