PATENTS

3103.----- [RUHRCHEMIE, A. G.]  [Process for the Catalytic Conversion of Hydrocarbons Especially Their Aromatization.]  German Patent Appl. R 110,308, R 578, filed July 12, 1941 (Cl. IV d-23 b).  TOM Reel 36, bag 3,454, item 36, 4 pp.; TOM Reel 177, frames 1,625-1,628; Meyer Transl. PC-S-II, Fischer-Tropsch, vol. 1, ch. 38, 1948, p.94.

Presence of oxygenated compounds in the starting material interferes with the catalytic conversion of hydrocarbons (aromatization, polymerization, dehydrogenation).  Such compounds are virtually eliminated by passing the vaporized hydrocarbon mixture over a metallic oxide, for example, Al, Mg, or alkaline earth oxide, at 150°-400° C.  In time the catalyst loses its activity and is regenerated in a current of air Aromatization and polymerization are then carried out as usual.  Removal oxygenated compounds raises the aromatic content of the final product from 26-49% by volume.