2910.     RÖTTIG, -----.  [Aromatization of Straight-Chain Aliphatic Hydrocarbons From the Fischer-Tropsch Synthesis.]  TOM Reel 138, Doc. 28, 13 pp.

        Some reference is made to the ability of Cr₂O₃ to convert napthenic and aliphatic hydrocarbons into aromatics and to the possibility of depositing these catalysts on active C, pumice, Al₂O₃, and silica gel.  Such metals as Ni, Co, Fe, Ta, etc., are mentioned as promoters.  Preliminary treatment of the catalysts with CO₂, H₂S, PH₃ is said to increase their activity.  Reference is made to the work of Huppke-Frey and Moldayskii-Kamuscher with multiple component catalysts.  Calcined magnesite is stated to increase catalyst activity.  It is possible by means of efficient fractionation columns to isolate C₅, C₆, C₇, and C₈ hydrocarbons from Fischer-Tropsch gasoline fractions.  A flow sheet of a cyclization is shown.  The economics of the process is discussed.