2856.     ---------------.  [ROELEN, O.]  [New Method of Cooling Catalyst Furnaces for the Synthesis of Hydrocarbons.]  FIAT Reel K-29, 1939, frames 6,936-6,940; PB 70,218; TOM Reel 296.

        Reaction temperature of certain catalysts, for example, Fe catalysts, are very high.  The use of H₂O as coolant causes high pressure, therefore the cooling system must have corresponding dimensions.  An appropriate fraction of the hydrocarbons prepared by the synthesis process is recommended as cooling medium.  Later it is returned to the process.