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Patent Abstracts

      253.     ------.  [BROOKS, R. E.]  (E. I. du Pont de Nemours & Co.).  Process for Production of 5-Carbon Acyclic Aldehydes.  United States Patent 2,517,383, Aug. 1, 1950; appl. filed Nov. 13, 1947, Serial No. 785,799; 2 claims (Cl. 260-604).  Chem. Abs., vol. 45, 1951. p. 1158.

Mixture of Co hydrogenation catalyst, 1-9 molar equivalents of CO and 3 H2 is heated to 75º-200º C. at 500-1,500 atm.  Butadiene is injected into the heated mixture.  The molar ratio of butadiene to unreacted H2 is kept<1:2.  1 United States patent cited.