456.    ---------------.[CHAKRAVARTY, K. M.]  Hydrogenation of Nickel Carbonyl.  Ind. Eng. Chem., vol. 31, 1939, pp. 1059-1060; Chem. Abs., vol. 33, 1939, p. 7498.

                  Evidence is given to show that the principal reactions in the process of Litkenhous and Mann (see abs. 2122) are CO+H₂=C+O₂ and 2 CO+2H₂=CO₂+CH₄.  (See abs. 2121.)