1635. INTERNATIONAL HYDROCARBON SYNTHESIS Co. Apparatus for Conversion of Carbon Monoxide. British Patent 536,169, May 6, 1941: appl. Filed Sept. 30, 1939. Chem. Abs., vol. 36. 1942, p. 1468.

In the production of hydrocarbons above C₃ the temperature in a number of converters is controlled by providing each of the converters with a closed cooling system in which a high boiling liquid is vaporized: the vapors are condensed by heat exchange in a common secondary vaporizing system employing H₂O.