Patents

3597. --------.  [Method of Carrying Out the Hydrogenation of Carbon Monoxide on Iron Catalysts in a Liquid Medium.]  German Patent Appl. St 61,846, PA 230,288, filed Apr. 3, 1943 (Dl. 12 o-1.03).  FIAT Reel B-196, frames 862-868 : PB 83,253.

In carrying out the hydrogenation of CO on Fe catalysts in a liquid medium under atmospheric or increased pressure, the fresh catalyst before induction with synthesis gas is reduced by a gas mixture containing CO and H₂ in the ratio of 1 : 1-1 : 3 in a liquid medium above the synthesis temperature.  The fresh catalyst is not brought into contact with the reducing gas until the reduction temperature is reached.  Example:  A precipitated oxide catalyst containing 12 gm. Fe, 20 gm. Cu, and 40 gm. K₂CO₃ is ground fine with some synthesis oil, then suspended in more of the same oil and stirred by a lively stream of N₂.  After the reduction temperature of 250º is reached, the catalyst is reduced under 10 atm. pressure with S 1. of synthesis gas containing CO : H₂ = 54 : 35 per 10 gm. Fe hourly.  The reduction is completed in 3 hr. after which the synthesis temperature is gradually reduced to 235º.  The CO conversion amounts to 91-94%.  There are formed per N m.³ of pure gas introduced products consisting of 11 gm. CH₄ and C₂H₆ and about 165 gm. chiefly of hydrocarbons, 122 gm. of which are liquids b. 25º-310º.  Of this 90 gm. are a benzine fraction b. 25º-170º, having an olefin content of 64% and an octane No. of 76.