PATENTS

      1638.  ------.  [INTERNATIONAL HYDROCARBON SYNTHESIS CO.]  [Carbon Monoxide-Hydrogen Synthesis.]  Italian Patent 387,038. Dec. 30, 1940.  Oel u. Kohle, vol. 39, 1943, Sch. 178: Chem. Zentralb., 1943. I. p. 589.

            To cool the catalyst space in the synthesis of hydrocarbons from CO and H₂, a synthetic oil b. 200º-320º is used as the cooling agent.  Because of its purity this oil is very stable to temperature.