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      1019.  ------ [HERBERT, W.].  (Metallgesellchaft A. G.).  [Production of Hydrocarbons by Carbon Monoxide Hydrogenation.]  German Patent 744,078, Jan. 8, 1944; appl. M 139,309, filed Sept. 26, 1937 (Cl. 12 o-1.03) FIAT Reel E 29, frames 614-615; PB 70, 432; FIAT Reel AA 89, frames 69-71; PB 70,274; TOM Reel 35, item 64, 6 pp.; Chem. Zentralb., 1944, I, p. 1353. 

            Catalysts have a long life and yield antiknock benzenes (octane number 165-170) when a CO-rich synthesis gas is used.  The medium pressure synthesis can be operated by recycling the synthesis gas and by passage of <1 l. of synthesis gas per l. of catalyst per hr.