256a.    BHATTACHARYYA, S. K., AND RAO, B. C. S.  Oxo Process.  I.  Synthesis of Propionaldehyde From Ethylene, Carbon Monoxide and Hydrogen in the Gas Phase in the Presence of Cobalt Catalysts at High Pressures.  Jour. Sci. Ind. Research (India), vol. 11 B, 1952, pp. 80-81; British Abs., 1952, B II, p. 794.

                    In preparing propionaldehyde by the Oxo process, the optimum conditions are:  A gas mixture of C₂H₄, CO, and H₂ (1:1:1), 150°, 150 atm. (3 hr.), and a catalyst containing 20% of Co (prepared by precipitating from nitrate solution with K₂CO₃) on kieselguhr.

          BILJCEVIC, P.  See abs. 2433.