PATENTS

3215.  RUTHRUFF, R. F. Catalytic Conversion of Fischer Synthesis Product.  United States Patent 2,467,407, Apr. 19, 1949; appl. filed Nov. 8, 1944, Serial No. 562,567; 8 claims (Cl. 196-50).

When the fraction of Fischer synthesis product b. 410°-650° F. is catalytically cracked with a synthetic silica-magnesia complex catalyst, gasoline of 75 octane number is produced with comparatively little gas loss.  The gasoline to gas ration is 3.  Gives 19 examples of catalyst preparation.  Example:  To 25 l. of a solution containing a total of 800 gm. MgSO₄ 7 H₂O there were added over a period of 4 hr., with stirring, 1.93 l. of a solution containing 376 gm. NaSiO₃.  The resulting precipitate was separated from the mother liquor by settling and decanting.  It was washed by making a slurry with H₂O, settling, and decanting.  This washing operation was repeated several times, and the precipitate was finally separated by filtration.  The product contained 38.5% magnesia and 61.5%silica on the H₂O free basis.  The catalyst may contain from a trace up to 1% zeolitic Na oxide.  15 United States patents cited.