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      217.     ------.  [BRAUNKOHLE-BENZIN, A. G.]  [Catalyst Pretreatment.]  German Patent Appl. B 182,020, filed Feb. 19, 1938 (Cl. IV d-126).  PB REPT. 412, May 15, 1945.

Pretreating a synthesis catalyst with synthesis gas containing NH3 for about 20 min, at 185º C.  Longer catalyst life results.