772. GARNER, P. J., AND MILLS, S. E. (Shell Development Co.). Olefins. United States Patent 2,642,466, June 16, 1953. Chem. Abs., vol. 47, 1953, p. 8,999.

Patent Abstracts

An improvement in the process for producing olefins by vaporphase thermal cracking is described by which the difficulty vaporizable fraction resulting from a processed paraffin wax is subjected to thermal soaking for 0.25-4 hr. at 390º-460º before reprocessing.