PATENT 3180. ----- [RUHRCHEMIE, A.G.] [Regulating Gas Flow Through Catalyst.] German Patent Appl. R 105,508, filed June 24, 1939 (Cl.iv d-12 o). PB Report 412, May 15, 1945. Process and apparatus whereby more uniform flow is maintained through a bed of synthesis catalyst by supplying the synthesis gas through a valve or orfice causing a considerably greater pressure drop than the catalyst bed itself. |