1968. KRUPP TREIBSTOFFWERK G. m. b. H. [Converter.] German Patent Appl. K 147,143, filed July 5, 1937 (Cl. IV b-12 g). PB Report 412, May 15, 1945.

Reactor for the Fischer-Tropsch process in which the cross section of the catalyst bed decreases from inlet to outlet according to the contraction in volume of the reacting gases.