2551. OFFICE NATIONAL INDUSTRIEL DE LíAZOTE. [Catalytic Reactions.] French Patent 700,034, Nov. 16, 1929. Chem. Abs., vol. 25, 1931, p. 3415.

In exothermic catalytic gas reactions the temperature is kept down by the introduction at points of equal distance in the catalyst of the gaseous mixture not yet combined at a temperature below the optimum temperature of reaction.