PATENTS

      1466.  ------.  [I. G. FARBENINDUSTRIE, A. G.]  [Process for the Production of Antiknock, Storage-Stable Gasoline.]  German Patent Appl. - -, OZ 12,069, filed Mar. 19, 1940.  TOM Reel 17, item 38. frames 1,070-1,076; Meyer Transl.  PC-S-II.  Fischer-Tropsch, vol. 3, chap. 112. 1948, p. 19.

            To improve unstable gasolines, particularly those obtained by cracking hydrocarbons or by catalytically hydrogenating CO, the material to be improved is brought together with a mixture of H₂ and CO suitable for conversion to hydrocarbons at such temperatures and pressures and in the presence of such known catalysts that stable hydrocarbons are formed from CO and H₂.  Example: CO and H₂ are reacted at about 190º in 2 steps in tubular converters provided with a Co catalyst.  The gas remaining in the 1^st step after the removal of the liquid hydrocarbons has the following composition: CO₂, 0.6%: H₂, 60.2%: CO, 19.8%: CH₄, 11.0%: N₂, 8.4%.  It serves as synthesis gas for the 2d step.  Daily in this step there is sprayed, per 1, of the catalyst, 2 1, of a gasoline produced by cracking a gasoline obtained by the reduction of CO by the Fischer process and having an olefin content of 41%, and octane number 68, and a bomb test of 33.  The end product, which contains about 10% of the synthetic gasoline, after distilling off the constituents b. >200, gives a gasoline with olefin content 39%, octane number 66, and a bomb test of 0.  The loss by evaporation is virtually nil.  The synthesis of stable hydrocarbons is not appreciably affected by the introduction of the cracked gasoline.  The yield decreases only to about 95% of normal.