2977.     ---------------.  [RUHRCHEMIE, A.-G.]  [Water-Gas Circulation Test Over Iron Catalyst.]  FIAT Reel L-5, July 25, 1942, frames 201-221; PB 70,159; TOM Reel 299.

        Test was carried out with water-gas circulation in a Lamella furnace with a filament-grain Fe catalyst.  The test was run for 140 operating days.  From the values obtained it is plainly revealed that shortening the operating time of the Fe catalyst would produce the highest yields of hard paraffins.  The test justifies the conclusion that the Fe catalyst can be effectively used for 3 months if a double-tube furnace is employed.