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Patent Abstracts

      1259.  ------.  [I. G. FARBENINDUSTRIE A. G.]  [Hydrocarbon Synthesis Operation.]  German Patent Appl. I 74,496, no date, (Cl. 12 o-5.02).  Auszüge deut. Patent-Anmeldungen, vol. 6, p. 212. 

            CO and H2 are reacted with olefins followed by hydrogenation in alternating operating catalyst zones.