2233.     MEISENHEIMER, K.  [Experiments With the Fischer Synthesis at Normal Pressure.]  FIAT Reel R-20, frames 7,546-7,551, Oct. 21, 1938; PB 73,564.

        Experiments at the Ammonia Laboratory, Oppau, deal with the influence of certain processes on the manufacture of Co catalysts and the effect of other additional catalyst metals.  It was found that washing out of the Co carbonate precipitated on the carrier must be thoroughly done.  Addition of Mn oxide to the Co catalyst leads to a more constant yield of paraffin after a longer reaction time.  Of the rare metals La oxide and Th oxide proved to be the best additions tested.  As substitutes for diatomaceous earth, kaolin and some brands of Al oxides are of importance.  Diatomaceous earth is not considered to be very suitable.  Finally Cu-containing Co catalysts were considered.  They can be used without a preliminary reduction.