2218.     ---------------.  [MAYER, M., AND ALTMAYER, V.]  [Synthesis of Methane With Calcium Hydride.]  Ber. deut. chem. Gesell., vol. 41, 1908, pp. 3074-3080; Chem. Abs., vol. 3, 1909, p. 64.

        CaH2 forms CH4 with CO, the maximum yield (65.6%) being at 500°.  The yield decreases as the temperature rises.  Other products of the reaction are C and CaC2.  With CO2 and CaH2, the maximum yield of CH4 is 60.24% at 500°.  Less CaC2 is produced and traces of Ca formate and oxalate and considerable quantities of CaCO2 also are formed.  Soot and CaH2 at 270° give H2 and N2; above 270° CH4 also is obtained.  The maximum yield is 40.68% at 500° or in a stream of H2 19%.  Some Ca3N2 also is produced.